January Weather in Mount Vernon, United States

Last updated: February 24, 2025

January in Mount Vernon, United States, brings a diverse range of winter weather experiences. Temperatures peak at a mild 20°C (69°F) during the day but can plunge to a chilling -16°C (3°F) at night, resulting in an average of 4°C (39°F) for the month. Rain and snow mix as 71 mm (2.8 in) of precipitation falls over 9 days, contributing to the overall humidity of 84% that often blankets the region. As residents embrace the winter chill, January becomes a month of contrasts—inviting both outdoor adventures and cozy indoor retreats.

January Temperature in Mount Vernon

In January, Mount Vernon experiences a crisp start to the year, with temperatures ranging from a frigid -16°C (3°F) at night to a more comfortable 20°C (69°F) during the day. This month marks a dramatic contrast, where the average temperature hovers around 4°C (39°F) — a stark reminder of winter's chill. As the season progresses into February, milder days gradually nestle in, with lows still dipping to -11°C (12°F), yet the overall average inches up to 6°C (43°F). Notably, by March, the promise of spring emerges with temperatures leaping into the 9°C (48°F) average, while highs flirt with the late twenties. This upward trend continues into the spring months, as temperatures steadily rise, paving the way for warmer days ahead.

January Weather in Mount Vernon: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Mount Vernon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec394348576675817973645044
Data source: Temperature data for Mount Vernon generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Mount Vernon

In Mount Vernon, January marks the year's start with a precipitation total of 71 mm (2.8 in), spread over approximately 9 rainy days. This establishes a trend of relatively moderate rainfall at the beginning of the year, setting a baseline that gradually rises in the following months. As winter transitions into spring, February sees an uptick in both precipitation and rain days, totaling 94 mm (3.7 in) over 11 days. The trend continues with March and April, where precipitation remains consistent, hovering around 90 mm, before soaring in the summer months. By the time July and August arrive, residents experience the heaviest rainfalls of the year, with 139 mm (5.5 in) and 149 mm (5.8 in), respectively. This pattern illustrates a seasonal shift, with winter's drier conditions giving way to the lush, rain-soaked summer. As the year progresses towards the fall and winter months, precipitation begins to taper off again, creating a rhythmic cycle of moisture that nurtures the region's vibrant ecosystems.

January Precipitation Trends in Mount Vernon

The chart displays monthly precipitation patterns in Mount Vernon, with values for each month alongside January's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec719491881041061391491001178497
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

January Humidity in Mount Vernon

In January, Mount Vernon experiences a high humidity level of 84%, setting the tone for a winter characterized by moisture-laden air. As the months progress into February and March, humidity remains relatively stable at 83%, before gradually declining to 81% in April. This trend continues into the warmer months, with a notable drop to 74% in July and 72% in August. However, the onset of fall brings a rise back to 75% in September, before peaking again at 85% in November and settling at 84% in December. Overall, January’s humidity reflects a consistent pattern of elevated moisture during winter, followed by a diminishing trend that culminates in seasonal fluctuations as the year progresses.

January Average Humidity in Mount Vernon

This chart illustrates the average monthly humidity levels in Mount Vernon, with January's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how January's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Mount Vernon

In January, Mount Vernon experiences a moderate UV Index of 3, allowing for a burn time of 30 minutes before skin damage occurs. As we move into February, the UV Index rises to 5, maintaining the same exposure category and burn time. The trend continues with March, where the UV Index escalates to 7, transitioning into the high exposure category, which shortens burn time to 25 minutes. Notably, from April through August, the UV Index peaks at 10, indicating very high exposure and a mere 15 minutes of burn time. As summer fades into early fall, September sees a decrease to an 8, while October and November revert to a more moderate 5 and 3 respectively, each offering 30 minutes of safe exposure. This seasonal fluctuation underscores the importance of UV awareness throughout the year. For more details, visit Mount Vernon UV Index.

Maximum UV Index Levels in Mount Vernon for January

The chart shows the monthly maximum UV Index (UVI) for Mount Vernon in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
Data source: Mount Vernon January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

January Sunshine in Mount Vernon

In Mount Vernon, January greets residents with 161 hours of sunshine, a gentle reminder of the winter chill. As the months roll on, the daylight gradually increases, peaking dramatically in the summer. February brings a slight rise to 187 hours, a hint of spring on the horizon. By March, the sun shines for 271 hours, invigorating the landscape, and as April unfolds, this number climbs to 289 hours. The warmth of May welcomes 319 hours of bright days, leading into the sunniest month of all, July, with an impressive 366 hours—the ultimate celebration of summer’s glory. However, as the seasons begin to change, sunshine begins to wane, with August at 336 hours and September at 294 hours. October marks a transition, offering 260 hours, while November and December wrap up the year with 230 hours and 193 hours, respectively, as the days draw shorter and winter's chill sets in. Overall, the sunshine trends reflect a vibrant cycle, characterizing the distinct seasons and the warmth that Mount Vernon enjoys throughout the year.

Monthly Sunshine Duration in Mount Vernon: January Highlighted

The January sunshine duration represents the total number of hours Mount Vernon experiences direct sunlight during the month of January, excluding cloudy or obstructed periods. This chart compares the sunshine duration of January with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec161h187h271h289h319h345h366h336h294h260h230h193h
Data source: Mount Vernon January Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mount Vernon During January

In Mount Vernon, January brings a 49% chance of sunny weather, positioning it among the more favorable months for sunshine. This likelihood is roughly mirrored in April, while it shows a notable increase in March and July, both with a 51% chance. The months of February and August experience a dip, with only 29% and 37% sunny days, respectively. Interestingly, as winter transitions to spring, there appears to be a trend toward sunnier conditions, culminating in the higher probabilities seen in the late summer and early autumn months like September at 58%. Overall, January is a promising start to the year for those who thrive under sunlit skies.

Percentage of Sunny Days in January in Mount Vernon

The chart illustrates the percentage of sunny days in Mount Vernon throughout the year, with January highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Mount Vernon experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%29%51%49%46%41%51%37%59%45%57%42%
Data source: Mount Vernon January chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mount Vernon in January

In Mount Vernon, United States, January brings about 9 hours of daylight, setting the stage for gradually lengthening days as winter transitions to spring. As February sweeps in, daylight increases to 10 hours, hinting at the promise of longer days ahead. By March, this trend accelerates, with daylight stretching to 11 hours, and the arrival of April marks a significant leap to 13 hours—a clear signal of the approaching warmth. May and June maintain this brightness with a consistent 14 hours of daylight, making it a delightful time for outdoor activities. As summer wanes into July and August, daylight starts to retreat, but gradually, leading to 13 hours in August. The descent continues through September and October, where daylight dips to 12 and 11 hours respectively, before returning to 10 hours in November and finishing off the year with 9 hours in December. This cycle illuminates the rhythmic dance of daylight throughout the year, reflectively highlighting the vibrant shifts of the seasons in Mount Vernon.

Average Daylight Hours in Mount Vernon for January

The chart illustrates the variation in daylight duration in Mount Vernon throughout the year, with January highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 49m10h 46m11h 58m13h 13m14h 15m14h 46m14h 29m13h 33m12h 22m11h 9m10h 4m9h 32m
Data source: Mount Vernon daylight hours, calculated by summing the hours between sunrise and sunset for each day.

January Winds in Mount Vernon

In January, Mount Vernon experiences a gentle breeze with an average wind speed of 3.7 m/s (8 mph), setting a calm tone for the month. As winter transitions into spring, the winds pick up slightly in February, reaching 4.1 m/s (9 mph), a speed that remains consistent through March and April. However, as May rolls in, a subtle decline occurs, with winds decreasing to 3.5 m/s (8 mph), leading to a seasonal trend where summer months display the weakest breezes—peaking in August at just 2.5 m/s (6 mph). Interestingly, as autumn approaches, the winds regain strength in November at 3.9 m/s (9 mph), reflecting a seasonal ebb and flow. Overall, January’s winds mark the beginning of a rhythm, where winter's tranquility gives way to spring breezes before settling into the stillness of summer.

Average January Wind Speed in Mount Vernon

The chart displays monthly wind speed patterns in Mount Vernon, with values for each month shown alongside January's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how January's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.7 m/s4.14.14.13.53.43.32.53.53.73.93.5
Data source: Mount Vernon January wind data, generated using information from the Copernicus Climate Change Service.

How January Weather in Mount Vernon Compares to Other Months

The weather in Mount Vernon changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Mount Vernon and find detailed weather information for every month.

January and February exhibit notable differences in weather patterns. January experiences a wide temperature range, with minimums reaching as low as -16°C (3°F) and maximums peaking at 20°C (69°F), culminating in an average temperature of 4°C (39°F). In contrast, February is slightly warmer, showcasing minimum temperatures of -11°C (12°F) and maximums of 23°C (74°F), with an average temperature of 6°C (43°F). Precipitation also varies, with January receiving 71 mm (2.8 inches) over 9 days, while February sees increased precipitation at 94 mm (3.7 inches) across 11 days. Despite the slight decrease in humidity—84% in January compared to 83% in February—the winter months remain relatively damp. For more details on February weather, check out Mount Vernon weather in February.

In January, temperatures range significantly, with a minimum of -16°C (3°F), averaging around 4°C (39°F), and peaking at 20°C (69°F). The month experiences 71 mm (2.8 in) of precipitation over approximately 9 days, accompanied by high humidity levels of 84%. In contrast, March sees a milder temperature profile, with a minimum of -6°C (22°F) and an average temperature of 9°C (48°F), while the maximum can reach 28°C (83°F). Precipitation slightly increases to 91 mm (3.6 in) over approximately 10 days, and humidity remains quite similar at 83%. For a more detailed comparison of March weather, you can explore Mount Vernon weather in March.

In January, temperatures in Mount Vernon can drop as low as -16°C (3°F) and typically hover around a chilly average of 4°C (39°F), with maximums reaching 20°C (69°F). The month experiences a significant amount of precipitation, averaging 71 mm (2.8 in) over 9 days, along with high humidity levels at 84%. In contrast, April brings a marked warming trend, with minimum temperatures at 0°C (32°F) and an average of 14°C (58°F), peaking at a pleasant 30°C (87°F). April also sees a slight increase in precipitation to 88 mm (3.5 in) across 11 days, though humidity levels dip slightly to 81%. For more insights on April weather, you can explore Mount Vernon weather in April.

In comparison, January and May present starkly different weather conditions. January is characterized by its cold temperatures, with a minimum of -16°C (3°F) and an average of 4°C (39°F), while May enjoys a much milder climate, boasting a minimum of 5°C (42°F) and an average of 19°C (67°F). Additionally, January experiences a maximum temperature of only 20°C (69°F), whereas May can reach a high of 33°C (91°F). Precipitation is slightly higher in May, with 104 mm (4.1 in) over 11 days compared to January's 71 mm (2.8 in) over 9 days. Humidity levels are also different, with January at 84% and May at 78%. For more specific details about the weather in May, you can check this link: Mount Vernon weather in May.

The weather in January contrasts sharply with that of June. In January, temperatures can drop as low as -16°C (3°F), with an average of 4°C (39°F) and a maximum reaching up to 20°C (69°F). During this month, the region experiences significant snowfall and humidity levels around 84%, with precipitation recorded on 9 days totaling 71 mm (2.8 in). In contrast, June brings much warmer weather, with temperatures ranging from a minimum of 12°C (54°F) to an average of 24°C (75°F), and highs reaching 33°C (91°F). Though June sees slightly higher precipitation at 106 mm (4.2 in) over 12 days, the overall humidity decreases to 79%, offering a more comfortable summer climate. For more specific details about June weather, you can check out Mount Vernon weather in June.

The weather in January and July presents a stark contrast, reflecting the extremes of seasonal change. In January, temperatures can plummet to a chilling minimum of -16°C (3°F), while averaging around a cool 4°C (39°F) and peaking at a maximum of 20°C (69°F). This winter month also sees considerable precipitation with 71 mm (2.8 inches) over about 9 days, accompanied by high humidity levels at 84%. In sharp contrast, July ushers in much warmer conditions with minimum temperatures of 15°C (60°F) and an average of 27°C (81°F), soaring to a maximum of 37°C (98°F). The summer month experiences increased precipitation at 139 mm (5.5 inches) over approximately 13 days, alongside slightly lower humidity at 74%. For a more detailed look at July weather specifics, visit Mount Vernon weather in July.

In January, temperatures are significantly colder, with a minimum of -16°C (3°F) and an average of 4°C (39°F), reaching a maximum of 20°C (69°F). The month experiences substantial precipitation, with 71 mm (2.8 in) falling over about 9 days, alongside high humidity levels at 84%.

Conversely, August brings much warmer conditions, with minimum temperatures around 17°C (63°F) and averages peaking at 26°C (79°F), reaching a maximum of 35°C (95°F). Precipitation is more frequent in August, totaling 149 mm (5.8 in) over 15 days, although humidity drops to 72%. This stark contrast in weather highlights the shift from the frigid days of winter to the heat of summer. For more information, you can check Mount Vernon weather in August.

In January, the weather is much colder, with temperatures ranging from a frigid -16°C (3°F) to a mild 20°C (69°F), averaging around 4°C (39°F). This month typically experiences higher humidity at 84% and about 71 mm (2.8 in) of precipitation spread over 9 days. In contrast, September offers a much warmer climate, with temperatures fluctuating between a minimum of 11°C (51°F) and a maximum of 33°C (92°F), averaging 23°C (74°F). Although September sees slightly more precipitation at 100 mm (3.9 in) over 10 days, the humidity is lower at 75%. For a detailed look at the weather in September, you can explore Mount Vernon weather in September.

January and October present stark contrasts in weather patterns. In January, temperatures can plummet as low as -16°C (3°F), with an average of around 4°C (39°F) and a milder maximum reaching 20°C (69°F). It also experiences 71 mm (2.8 in) of precipitation over 9 days, coupled with high humidity at 84%. In contrast, October sees much warmer temperatures, ranging from a minimum of 4°C (40°F) to an average of 18°C (64°F) and a maximum that can touch 32°C (91°F). This month is wetter, recording 117 mm (4.6 in) of precipitation, while maintaining a slightly lower humidity of 81%. For more insights into what to expect, check out Mount Vernon weather in October.

January typically experiences colder temperatures compared to November, with minimums reaching as low as -16°C (3°F) and an average of 4°C (39°F). In contrast, November has milder temperatures, with minimums around -4°C (24°F) and an average of 10°C (50°F). Precipitation is slightly higher in November, totaling 84 mm (3.3 in) over 8 days, compared to January's 71 mm (2.8 in) over 9 days. Despite both months having similar humidity levels, January's chilliness starkly contrasts with November's relatively comfortable conditions. For more details, check out Mount Vernon weather in November.

When comparing the weather in January and December, January tends to be colder, with minimum temperatures plummeting to -16°C (3°F) as opposed to December's milder minimum of -9°C (16°F). Average temperatures in January hover around 4°C (39°F), slightly lower than December's average of 6°C (44°F). Both months experience similar maximum temperatures, peaking at 20°C (69°F) in January and 21°C (69°F) in December. Precipitation is more abundant in December, totaling 97 mm (3.8 in) over 10 days compared to January's 71 mm (2.8 in) across 9 days. Humidity remains consistent at 84% for both months. For more detailed information, check out Mount Vernon weather in December.

Compare Mount Vernon's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Mount Vernon

January in Mount Vernon presents a stark contrast to the milder months of the year, as temperatures dip significantly, revealing a wintry chill that can plunge to as low as -16°C (3°F). With an average temperature around 4°C (39°F), it serves as a reminder of winter's grasp before the warmth of spring arrives. The increased humidity at 84% combined with nearly 10 days of precipitation enriches the atmosphere, making January one of the wetter months, further distinguishing it from the drier summer season. As the month unfolds, the chill sets the stage for cozy indoor activities and winter festivities, offering a unique charm contrasted with other times of the year. For further insights into the full climate patterns, explore Mount Vernon Climate.