January Weather in Hyannis, United States

Last updated: February 24, 2025

In January, Hyannis experiences a brisk winter climate characterized by a maximum temperature of 13°C (55°F) and an average of just 2°C (36°F), with lows dipping to -14°C (6°F). This month typically sees rainfall totaling 94 mm (3.7 in) across approximately 10 days, resulting in a damp atmosphere with humidity levels averaging a notable 84%. While the chill permeates the air, the occasional rain offers a refreshing twist to the winter landscape, making January in Hyannis a blend of cold and cozy maritime charm.

January Temperature in Hyannis

January in Hyannis, United States, brings a chilly embrace as temperatures fluctuate from a brisk minimum of -14°C (6°F) to a mild maximum of 13°C (55°F), with an average hovering around 2°C (36°F). This month marks the peak of winter's hold, showcasing a sharp contrast to the more temperate months that follow. As February approaches, we see a slight upward shift, with lows of -12°C (10°F) and highs declining to 11°C (53°F), while the average remains constant, hinting at a gradual thaw. The transition into March continues the trend, with temperatures inching upward toward an average of 3°C (38°F). Overall, January sets the stage for the slow yet steady march toward spring, as the region begins to warm up after the coldest days of the year.

January Weather in Hyannis: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Hyannis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec353638455363707266594839
Data source: Temperature data for Hyannis generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Hyannis

In January, Hyannis experiences an average precipitation of 94 mm (3.7 in) over approximately 10 days, setting the tone for the wet winter months ahead. As the year progresses, precipitation amounts gradually increase, peaking in October at 175 mm (6.9 in), accompanied by about 12 days of rainfall. Interestingly, February and April also see significant totals of 123 mm (4.8 in) and 137 mm (5.4 in), hinting at a trend where spring emerges with increased moisture. The precipitation days remain relatively stable across most months, with January averaging 10 days, mirroring the rainfall patterns seen in March and September. As the seasons transition into summer, both the amount and frequency of rain decrease, with July and August recording the lowest totals of 83 mm (3.3 in) and 82 mm (3.2 in), respectively, creating a distinct contrast to the wetter winter and early spring months.

January Precipitation Trends in Hyannis

The chart displays monthly precipitation patterns in Hyannis, 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.
JanFebMarAprMayJunJulAugSepOctNovDec94123118137119918382118175102136
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Hyannis

In January, Hyannis experiences its peak humidity at a notable 84%, a trend that continues into February, reflecting the region's persistent winter moisture. As spring approaches in March, humidity begins to taper slightly to 82%, further decreasing as the months progress. By the time April arrives, levels drop to 79%, showcasing the transition towards more temperate conditions. The summer months offer a respite, with humidity stabilizing around 75-78% from May through August, making it feel pleasantly comfortable. However, as autumn sets in, the humidity starts to climb again, reaching 80% in both November and December. This cyclical pattern not only emphasizes the seasonal shifts in Hyannis but also highlights the region's overall moisture-rich environment throughout the year.

January Average Humidity in Hyannis

This chart illustrates the average monthly humidity levels in Hyannis, 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%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Hyannis

In January, the UV Index in Hyannis stands at a moderate 3, indicating that while sun exposure is generally safe, it's still wise to be mindful, with a burn time of about 30 minutes. As winter progresses into February, the UV level increases slightly to 4, but the exposure remains in the moderate category. A notable shift occurs in March, when the UV Index spikes to 6, marking the transition to high exposure, which means shorter burn times of just 25 minutes. This upward trend continues through the spring and into summer, where values soar to 9 or 10 from May to July, representing very high UV exposure and necessitating vigilant sun protection. As fall approaches in September, the index begins to decline again, signaling a gradual return to lower levels. By the end of the year in December, the UV Index drops to a low 2, allowing for longer safe exposure times of 45 minutes. To learn more about UV patterns throughout the year, visit Hyannis UV Index.

Maximum UV Index Levels in Hyannis for January

The chart shows the monthly maximum UV Index (UVI) for Hyannis 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.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998642
Data source: Hyannis 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 Hyannis

In January, Hyannis tends to bask in about 142 hours of sunshine, setting the tone for a year that gradually brightens. The sun's presence begins to strengthen in February, rising to 184 hours, and by March, this increase becomes even more pronounced, with a total of 258 hours illuminating the skies. As spring unfolds into summer, the solar spectacle reaches its peak in July with an impressive 346 hours of sunshine, making it the sunniest month of the year. From this high point, the hours gradually taper off, but remain generous, with 330 hours in August and 280 hours in September. This sun-filled journey gradually dims through the fall and winter, concluding the year with 165 hours in December. The trend showcases a rhythm of changing seasons, where every month offers its unique mix of sunlight, inviting residents and visitors alike to revel in the warmth whenever it graces the shores.

Monthly Sunshine Duration in Hyannis: January Highlighted

The January sunshine duration represents the total number of hours Hyannis 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.
JanFebMarAprMayJunJulAugSepOctNovDec142h184h258h243h298h326h346h330h280h236h203h165h
Data source: Hyannis January Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hyannis During January

In January, residents and visitors of Hyannis, United States, can expect a 36% chance of sunny weather, setting the tone for a month that isn’t exactly drenched in sunlight. Compared to the following February, which sees a 28% likelihood of clear skies, January offers a slightly brighter outlook. As spring draws near, the chances of sunshine increase significantly, peaking at 57% in March. Interestingly, late fall and early winter months, like December and November, hover around 28% and 52%, respectively, suggesting that as winter progresses, the likelihood of sunny days fluctuates. Overall, while January may not be the sunniest month, it serves as a stepping stone towards the brighter days of spring.

Percentage of Sunny Days in January in Hyannis

The chart illustrates the percentage of sunny days in Hyannis 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 Hyannis experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%28%57%43%41%38%37%35%49%44%52%28%
Data source: Hyannis January chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hyannis in January

In Hyannis, January ushers in a modest 9 hours of daylight, marking the tail end of winter's grasp. As the month progresses, daylight gradually increases, emphasizing the transition toward spring. By February, residents enjoy an extra hour, bringing the total to 10 hours, while March sees even more light with 11 hours. The pace accelerates dramatically in April and May, where daylight stretches to 13 and 14 hours, respectively, creating a vibrant atmosphere as nature awakens. June peaks at 15 hours, offering the longest days of the year. However, following the summer solstice, the daylight starts to recede slightly, with July at 14 hours and August tapering to 13. This seasonal ebb and flow continues into the autumn months, with daylight tying back to 12 hours in September and fading to 9 hours by November, then holding steady in December. This rhythmic pattern captures the enchanting cycle of light throughout the year in Hyannis.

Average Daylight Hours in Hyannis for January

The chart illustrates the variation in daylight duration in Hyannis throughout the year, with January highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 31m10h 36m11h 58m13h 22m14h 33m15h 8m14h 49m13h 45m12h 25m11h 1m9h 48m9h 11m
Data source: Hyannis daylight hours, calculated by summing the hours between sunrise and sunset for each day.

January Winds in Hyannis

In January, Hyannis experiences a brisk average wind speed of 7.1 m/s (16 mph), setting the tone for an invigorating winter. As the month slips into February, the winds pick up slightly to 7.2 m/s, creating an atmosphere that encourages brisk walks along the coast. Moving into March, conditions mellow slightly with a dip to 7.0 m/s, indicating a subtle approach of spring. This trend continues into April, where the winds ease further to 6.5 m/s. The following months, particularly from May to August, see a gradual decline in wind speed, hitting the year's lowest average of 4.8 m/s (11 mph) in August, which is perfect for calmer summer days by the water. As autumn arrives, speeds begin to pick up again, culminating in November and December where the winds return to a steadier 6.7 m/s. Overall, January serves as the gateway to a seasonal ebb and flow of winds, shaping the unique character of Hyannis throughout the year.

Average January Wind Speed in Hyannis

The chart displays monthly wind speed patterns in Hyannis, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.1 m/s7.27.06.55.96.25.24.85.96.66.76.6
Data source: Hyannis January wind data, generated using information from the Copernicus Climate Change Service.

How January Weather in Hyannis Compares to Other Months

The weather in Hyannis 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 Hyannis and find detailed weather information for every month.

January and February exhibit similar average temperatures, both hovering around 2°C (36°F); however, January experiences slightly colder extremes, with a minimum of -14°C (6°F) compared to February's -12°C (10°F). Precipitation in February increases, totaling 123 mm (4.8 in) over 12 days, compared to January’s 94 mm (3.7 in) over 10 days. Interestingly, both months share a consistent humidity level of 84%, contributing to the chilly atmosphere experienced during this winter period. For more detailed weather information, you can check Hyannis weather in February.

In January, temperatures are quite cold, with a minimum of -14°C (6°F) and an average of 2°C (36°F), while March brings slightly milder conditions, as temperatures range from a minimum of -9°C (16°F) to an average of 3°C (38°F). Although both months have a maximum temperature of around 13°C (55°F), March experiences a higher total precipitation of 118 mm (4.7 in) compared to January's 94 mm (3.7 in), with rain occurring on approximately 10 days in both months. Humidity levels are also similar, with January at 84% and March slightly lower at 82%. For a more detailed outlook on the weather in March, you can check out Hyannis weather in March.

January and April present contrasting weather patterns. In January, temperatures can dip as low as -14°C (6°F) with an average of 2°C (36°F), while April sees milder conditions, with temperatures ranging from a minimum of 1°C (33°F) to a maximum of 16°C (60°F). Precipitation in January totals 94 mm (3.7 in) over about 10 days, whereas April experiences a slight increase in rainfall, reaching 137 mm (5.4 in) across 13 days. Additionally, the humidity in January is higher at 84%, compared to April's 79%. For more detailed information on April's weather, you can check Hyannis weather in April.

January and May present stark contrasts in weather conditions. In January, temperatures can drop as low as -14°C (6°F), with an average of 2°C (36°F) and a maximum of 13°C (55°F). The month is marked by high humidity at 84% and about 94 mm (3.7 in) of precipitation spread over 10 days. In contrast, May sees milder temperatures, with a minimum of 5°C (41°F), an average of 12°C (53°F), and a high of 21°C (70°F). Although May experiences slightly more precipitation at 119 mm (4.7 in) over 12 days, the humidity is notably lower at 75%. For a more detailed look at the weather patterns, check out Hyannis weather in May.

In January, the weather is characterized by much colder temperatures, with minimums reaching as low as -14°C (6°F) and an average temperature of around 2°C (36°F). In contrast, June brings a significant warming trend, with minimum temperatures starting at 10°C (51°F) and averages climbing to 17°C (63°F). While both months receive similar levels of precipitation—January recording 94 mm (3.7 in) and June slightly less at 91 mm (3.6 in)—the humidity is higher in January at 84%, compared to June's 78%. For a closer look at what to expect during this summer month, you can explore more at Hyannis weather in June.

January and July exhibit stark contrasts in weather. January temperatures can drop to a chilling minimum of -14°C (6°F), with an average of just 2°C (36°F) and a maximum of 13°C (55°F). The month receives approximately 94 mm (3.7 in) of precipitation over 10 days, coupled with high humidity at 84%, making it feel even colder. In contrast, July offers a much warmer climate, with minimum temperatures around 16°C (61°F), an average of 21°C (71°F), and maximums reaching 29°C (84°F). Precipitation in July is slightly lower at 83 mm (3.3 in), occurring over 9 days, and the humidity is reduced to 76%. For more details, check out Hyannis weather in July.

The weather in January is characterized by much colder temperatures, with a minimum of -14°C (6°F) and an average of 2°C (36°F), while August enjoys milder conditions with a minimum of 16°C (61°F) and an average of 22°C (72°F). January sees significant precipitation, totaling 94 mm (3.7 in) over about 10 days, and experiences higher humidity at 84%. In contrast, August is slightly drier, with precipitation of 82 mm (3.2 in) over just 8 days and humidity at a more comfortable 76%. For a closer look at the weather trends in August, you can check Hyannis weather in August.

January and September present markedly different weather conditions. In January, temperatures can drop as low as -14°C (6°F), with an average of 2°C (36°F) and a maximum of 13°C (55°F), leading to a cold and chilly atmosphere. The month also sees significant precipitation, averaging 94 mm (3.7 inches) over about 10 days, coupled with high humidity at 84%. In contrast, September offers a much milder climate, where temperatures range from a minimum of 13°C (56°F) to a comfortable average of 19°C (67°F), reaching up to 25°C (78°F) at times. Although September has slightly higher precipitation at 118 mm (4.7 inches) over the same number of days, the humidity is lower at 75%. The transition from winter's chill to early autumn warmth makes September a notably more inviting month. For more details, check out Hyannis weather in September.

January and October present quite contrasting weather conditions. In January, temperatures can dive as low as -14°C (6°F), with an average of just 2°C (36°F) and a maximum of 13°C (55°F). The month also sees significant precipitation at 94 mm (3.7 in) over about 10 days, coupled with high humidity levels averaging 84%.

In stark contrast, October offers milder temperatures, ranging from a minimum of 4°C (39°F) to an average of 15°C (59°F) and a maximum of 22°C (72°F). The precipitation in October rises to 175 mm (6.9 in) across 12 days, but the humidity is notably lower at 75%. For those interested in a more detailed look at October weather patterns, you can check out Hyannis weather in October.

In comparing the weather between January and November, notable differences emerge. January experiences harsher cold temperatures, with minimums dropping to -14°C (6°F) and an average of only 2°C (36°F), while November offers a milder range, with minimums around -6°C (21°F) and a more comfortable average of 9°C (48°F). Precipitation levels in both months are fairly similar, with January receiving 94 mm (3.7 in) and November slightly higher at 102 mm (4.0 in), both over approximately 10 days. Humidity during January is also higher at 84% compared to November’s 80%. For a more detailed look, check out Hyannis weather in November.

When comparing the weather in January and December, January tends to be slightly colder on average, with temperatures ranging from a minimum of -14°C (6°F) to a maximum of 13°C (55°F), while December features a minimum of -12°C (11°F) and a maximum of 15°C (60°F). Precipitation is also less in January, totaling 94 mm (3.7 in) over about 10 days, compared to December's 136 mm (5.4 in) over 12 days. Additionally, January has a higher humidity level at 84%, compared to December's 80%. For more specific details on December weather, you can check Hyannis weather in December.

Compare Hyannis's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Hyannis

January in Hyannis presents a striking contrast to the milder months, characterized by chilly temperatures, frequent precipitation, and high humidity. As winter settles in, the typical weather brings an average temperature that feels significantly cooler than the spring and summer months, resulting in a crisp, brisk atmosphere. With precipitation occurring on several days throughout the month, residents and visitors can expect a mix of snow and rain, making it a time for warm clothing and cozy indoor activities. As you experience Hyannis in January, embrace the beauty of the season while preparing for the chill. For a deeper understanding of the year's climate patterns, check out Hyannis Climate.