January Weather in Dennis, United States

Last updated: February 24, 2025

January in Dennis, United States, showcases a chill atmosphere with a maximum temperature reaching 13°C (55°F) and an average hovering around 2°C (36°F). The month is characterized by cold snaps, with lows dipping to a minimum of -14°C (6°F). Precipitation is notable, accumulating to 94 mm (3.7 in) over 10 days, contributing to the region's high humidity level of 84%. This combination of frigid temperatures and damp conditions creates a uniquely brisk winter experience for residents and visitors alike.

January Temperature in Dennis

In January, Dennis, United States experiences one of its coldest months, with temperatures dipping as low as -14°C (6°F) and averaging around 2°C (36°F). This chill sets the tone for the winter season, with maximum temperatures reaching 13°C (55°F), providing only brief moments of milder weather. As February arrives, temperatures remain relatively stable, with similar averages, but the min and max values slightly adjust, hinting at an early transition towards spring. By March, the days gradually warm up, raising average temperatures to 3°C (38°F) and bringing hopes of the impending thaw. Overall, January marks a frigid peak in the winter cycle, showcasing the region's dramatic temperature variations and laying the groundwork for the gradual warming trend that follows in the months ahead.

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

The chart illustrates January temperature patterns in Dennis, 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 Dennis 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 Dennis

In January, Dennis, United States, experiences an average precipitation of 94 mm (3.7 in) over approximately 10 days, setting the tone for a relatively wet winter month. Although January's rainfall is less than the subsequent February total of 123 mm (4.8 in), it serves as a vital precursor to the wetter spring months ahead. The precipitation trend steadily climbs from January through April, peaking in April at 137 mm (5.4 in), before gradually tapering off in the following summer months. This pattern highlights a significant seasonal shift, where winter yields to spring rain, culminating in lush growth as the year progresses. With the consistency of precipitation days, January marks the start of Dennis’s rainy season, indicating that residents should be ready for those crisp, wet days ahead.

January Precipitation Trends in Dennis

The chart displays monthly precipitation patterns in Dennis, 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 Dennis

In January, Dennis, United States, experiences notably high humidity at 84%, a trend that continues into February. This consistent moisture sets the tone for the winter months, followed by a gradual decline as spring approaches, with March and April witnessing a dip to 82% and 79%, respectively. As summer unfolds, May brings a further drop to 75%, maintaining a relatively comfortable atmosphere. Through the mid-year, humidity levels hover around the mid-70% range, showing little fluctuation until the cooler months return, where we see a slight increase again in November and December to 80%. Overall, Dennis' humidity levels reflect a pattern of consistency, gently ebbing and flowing with the seasons, promoting a unique coastal climate.

January Average Humidity in Dennis

This chart illustrates the average monthly humidity levels in Dennis, 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 Dennis

In January, Dennis, Massachusetts, experiences a moderate UV Index of 3, indicating an exposure level where sunburn may occur after about 30 minutes in the sun. As the month progresses into February, the UV Index rises slightly to 4, maintaining the same burn time. However, spring brings a notable shift; by March, the UV Index climbs to 6—a high level with a reduced burn time of 25 minutes. This upward trend continues through the months, peaking in June with an intense 10, where sun protection becomes essential in just 15 minutes of exposure. The summer months, especially July and August, sustain this high level before tapering off in September. As autumn sets in, the UV Index gradually declines, hitting 4 in November and dropping to a low of 2 in December, extending the burn time to 45 minutes. This seasonal fluctuation underscores the importance of monitoring UV levels year-round to safeguard your skin. For more insights, visit the Dennis UV Index.

Maximum UV Index Levels in Dennis for January

The chart shows the monthly maximum UV Index (UVI) for Dennis 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: Dennis 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 Dennis

In Dennis, United States, January brings a modest 142 hours of sunshine, setting the stage for a gradual climb in light as the year unfolds. By February, the days start to lengthen with 184 hours, hinting at the vibrant spring ahead. As the temperature rises, March sees a leap to 258 hours, followed by an impressive 243 hours in April. The real sunshine splendor occurs from late spring into summer, peaking in July with 346 hours—the sun-drenched days inviting outdoor adventures. Although August remains robust at 330 hours, sunlight begins to wane as fall approaches, with September still basking in 280 hours. The trend continues downward into the cooler months, wrapping up the year with December's 165 hours. Ultimately, this progression not only highlights the beauty of seasonal transitions in Dennis but also paints a vivid picture of the area's annual sunshine rhythm.

Monthly Sunshine Duration in Dennis: January Highlighted

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

Chance of Sun in Dennis During January

In Dennis, United States, January brings a promising 36% chance of sunny weather, making it one of the more favorable months for sun-seekers during the winter. While this is a significant drop from the sunnier months of March and November, which boast chances of 57% and 52% respectively, January still outshines the cold February, where the likelihood of sun dips to just 28%. As winter progression continues, it's clear that sunshine begins to reemerge in the early spring, with April (43%) providing a notable bump. This trend suggests that although January may start with a frosty finish, there’s hope on the horizon, as the daylight minutes lengthen and the sun’s presence gradually becomes more prominent in the following months.

Percentage of Sunny Days in January in Dennis

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

Daylight Hours in Dennis in January

In January, Dennis, United States, experiences about 9 hours of daylight, marking the winter's peak darkness. However, as the months unfold, daylight gradually increases, reaching 10 hours in February and 11 hours in March. This trend continues to gain momentum as April brings a significant jump to 13 hours, and by May, residents enjoy a generous 14 hours of sunlight. The longest days occur in June, with 15 hours of daylight, before a small decline begins in July as days shorten back to 14 hours. The days gradually decrease through the late summer and early fall, with 12 hours in September, dwindling down to 9 hours again by November and December. The cyclical nature of daylight in Dennis beautifully encapsulates the changing seasons, offering a natural rhythm that marks the passage of time.

Average Daylight Hours in Dennis for January

The chart illustrates the variation in daylight duration in Dennis 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: Dennis daylight hours, calculated by summing the hours between sunrise and sunset for each day.

January Winds in Dennis

In January, the winds in Dennis, United States, are brisk, with an average speed of 7.1 m/s (16 mph), making it one of the windiest months of the year. This slight increase in wind speed from December and February—both at 7.2 m/s (16 mph)—highlights a trend of consistent breeziness that persists through the early winter months. As spring approaches, the winds begin to gentle down, with April averaging 6.5 m/s (15 mph), marking a transition towards milder conditions. Notably, by July, the winds lose some of their vigor, dipping to 5.2 m/s (12 mph), the calmest period of the year, which continues through the summer and into August. This seasonal variation emphasizes the dynamic character of Dennis's winds, offering a refreshing contrast to the warmer months ahead.

Average January Wind Speed in Dennis

The chart displays monthly wind speed patterns in Dennis, 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: Dennis January wind data, generated using information from the Copernicus Climate Change Service.

How January Weather in Dennis Compares to Other Months

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

January and February exhibit similar average temperatures, with both months averaging around 2°C (36°F); however, February tends to be slightly cooler, with a maximum of 11°C (53°F) compared to January's 13°C (55°F). Precipitation levels increase in February, reaching 123 mm (4.8 in) over 12 days, whereas January sees 94 mm (3.7 in) across 10 days. Humidity remains consistent at 84% for both months, creating a chilly atmosphere. For more specific details on February weather in Dennis, you can check out Dennis weather in February.

In January, temperatures can drop as low as -14°C (6°F), with an average temperature of 2°C (36°F) and a maximum reaching 13°C (55°F). The month typically sees about 94 mm (3.7 in) of precipitation over 10 days, with humidity at a relatively high 84%. In contrast, March brings slightly milder conditions, featuring temperatures that range from a minimum of -9°C (16°F) to an average of 3°C (38°F), with a similar maximum of 13°C (56°F). However, March experiences a bit more precipitation at 118 mm (4.7 in) over the same number of days, while humidity decreases slightly to 82%. For a closer look at the weather specifics in Dennis during March, visit Dennis weather in March.

In January, temperatures can plummet to as low as -14°C (6°F), with an average of 2°C (36°F) and a maximum of 13°C (55°F), making it one of the coldest months of the year. This winter chill is accompanied by significant precipitation, totaling 94 mm (3.7 in) over approximately 10 days, along with high humidity reaching 84%. In contrast, April brings a noticeable warming trend, with minimum temperatures rising to 1°C (33°F) and daily averages around 7°C (46°F), peaking at 16°C (60°F). Although it is wetter in April, with precipitation of 137 mm (5.4 in) spread over 13 days, the humidity is slightly lower at 79%. For more details on weather specifics in April, you can visit Dennis weather in April.

January and May present a stark contrast in weather conditions. In January, temperatures typically range from a frigid minimum of -14°C (6°F) to a maximum of 13°C (55°F), with an average of just 2°C (36°F). This cold month also sees significant precipitation, amounting to 94 mm (3.7 in) over about 10 days, accompanied by high humidity levels of 84%. In contrast, May experiences a much milder climate, with temperatures ranging from a low of 5°C (41°F) to a pleasant high of 21°C (70°F), averaging around 12°C (53°F). While May has slightly more precipitation at 119 mm (4.7 in) over 12 days, the humidity drops to a more comfortable 75%. For more detailed insights, you can visit Dennis weather in May.

In January, the weather is notably cold, with temperatures ranging from a chilling minimum of -14°C (6°F) to a comparatively moderate maximum of 13°C (55°F), creating an average temperature of around 2°C (36°F). The month is characterized by high humidity at 84% and significant precipitation, averaging 94 mm (3.7 in) over about 10 days. In contrast, June brings a welcoming warmth, with temperatures ranging from a minimum of 10°C (51°F) to a pleasant maximum of 24°C (76°F), and an average of 17°C (63°F). The humidity decreases slightly to 78%, and precipitation remains similar at 91 mm (3.6 in) over the same number of rainy days. For more details on the weather in Dennis during June, you can check this link: Dennis weather in June.

January and July present stark contrasts in weather conditions. In January, temperatures can plummet as low as -14°C (6°F), with an average around 2°C (36°F) and a maximum reaching just 13°C (55°F). The month sees considerable precipitation, totaling 94 mm (3.7 in) over approximately 10 days, contributing to a high humidity level of 84%. In contrast, July offers a much warmer climate, with minimum temperatures around 16°C (61°F) and an average of 21°C (71°F), peaking at 29°C (84°F). While precipitation in July is slightly lower at 83 mm (3.3 in), it occurs over fewer days (9), and the humidity drops to 76%. For a detailed look at July weather in Dennis, you can visit this link: Dennis weather in July.

January and August present a stark contrast in weather conditions. In January, temperatures can drop as low as -14°C (6°F), with an average temperature of 2°C (36°F) and a maximum of 13°C (55°F). The month experiences significant precipitation, with about 94 mm (3.7 in) falling over 10 days, contributing to high humidity levels at 84%. In contrast, August enjoys milder temperatures, with a minimum of 16°C (61°F), an average of 22°C (72°F), and a maximum of 27°C (81°F). Precipitation in August is slightly lower at 82 mm (3.2 in) over 8 days, and humidity is more comfortable at 76%. For a detailed look at the weather conditions in August, you can visit Dennis weather in August.

In January, the weather is quite cold, with temperatures ranging from a frigid -14°C (6°F) to a maximum of 13°C (55°F) and an average temperature of 2°C (36°F). During this month, there is notable precipitation of 94 mm (3.7 in) over about 10 days, accompanied by high humidity levels at 84%. In contrast, September experiences a much milder climate, with temperatures ranging from a minimum of 13°C (56°F) to a pleasant maximum of 25°C (78°F) and an average of 19°C (67°F). This month also sees slightly more precipitation at 118 mm (4.7 in), but the number of rainy days remains the same at 10, with humidity levels lower at 75%. For more detailed information on the weather conditions, check out Dennis weather in September.

In January, temperatures can drop to a chilly -14°C (6°F), with an average of 2°C (36°F) and a maximum of 13°C (55°F), while October enjoys much milder conditions with a minimum of 4°C (39°F), an average of 15°C (59°F), and highs reaching 22°C (72°F). Additionally, January experiences about 94 mm (3.7 in) of precipitation over 10 days, compared to October's 175 mm (6.9 in) over 12 days. The humidity is notably higher in January at 84%, while October has a more comfortable level at 75%. For more specific details about the weather in Dennis during October, you can visit Dennis weather in October.

In comparing the weather between January and November, notable differences in temperature and precipitation patterns emerge. January typically experiences colder temperatures, with minimums plummeting to -14°C (6°F) and an average of around 2°C (36°F), whereas November offers a milder climate, where temperatures range from a minimum of -6°C (21°F) to an average of 9°C (48°F). Both months see a similar number of precipitation days, around 10, but January's total precipitation is slightly lower at 94 mm (3.7 in) compared to November’s 102 mm (4.0 in). Additionally, January maintains a higher humidity level at 84%, versus November's 80%. For more details on the weather in November, you can explore Dennis weather in November.

January typically experiences slightly colder temperatures compared to December, with average highs reaching 13°C (55°F) and lows dropping to -14°C (6°F), while December has an average high of 15°C (60°F) and lows of -12°C (11°F). Precipitation is also lower 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, humidity remains higher in January at 84%, compared to December's 80%. For more detailed insights, you can check Dennis weather in December.

Compare Dennis's Climate with Cities Worldwide

Conclusion: What to Expect From January Weather in Dennis

January in Dennis presents a stark contrast to the milder months of the year, characterized by cold temperatures and increased precipitation. With an average chill that hovers around freezing and occasional dips below zero, the month embraces winter's full force, leaving behind the warmth of autumn and the mildness of spring. While rain is common, the 84% humidity adds a biting edge to the air, making the experience feel even colder. Unlike the sunnier days of summer, January typically showcases overcast skies, resulting in a serene yet stark landscape. To delve deeper into how January's climate shapes life in Dennis, be sure to explore Dennis Climate.