January Weather in Cohasset, United States

Last updated: June 24, 2025

In January, the average temperature in Cohasset, United States hovers around 1°C (34°F). Expect a chill, with lows dipping to a brisk -16°C (3°F) and highs reaching a mild 15°C (60°F). During this month, precipitation averages 97 mm (3.8 in) over approximately 9 days, while the air remains quite damp with an average humidity of 86%. Be prepared for a mix of cold and wet weather!

January Temperature in Cohasset

In January in Cohasset, the average temperature is 1°C (34°F). Maximums can reach 15°C (60°F) and minimums can be as low as -16°C (3°F). It's essential to pack warm clothing and be prepared for a range of temperatures during your travels.

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

The chart illustrates January temperature patterns in Cohasset, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cohasset, January typically has an average temperature of 1°C (34°F), with highs reaching up to 15°C (60°F) and lows dropping to around -16°C (3°F).

Data source: Temperature data for Cohasset generated using information from the Copernicus Climate Change Service.

January Precipitation in Cohasset

In Cohasset in January, the total precipitation amount reaches 97 mm (3.8 in) over the course of 9 days.

January Precipitation Trends in Cohasset

The chart displays monthly precipitation patterns in Cohasset, 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. In Cohasset, January typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Cohasset

In Cohasset in January, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

January Average Humidity in Cohasset

This chart illustrates the average monthly humidity levels in Cohasset, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Cohasset is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Cohasset

In Cohasset in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Cohasset, you can visit Hourly UV Index in Cohasset.

Maximum UV Index Levels in Cohasset for January

The chart shows the monthly maximum UV Index (UVI) for Cohasset 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. In January, the maximum UV index in Cohasset typically reaches 2, which falls under the low exposure category.

Data source: Cohasset 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.

How January Weather in Cohasset Compares to Other Months

Weather in Cohasset varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Cohasset, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Cohasset, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	97 mm (3.8 inches)	86%	low
February Weather	2°C (35°F)	122 mm (4.8 inches)	84%	moderate
March Weather	3°C (38°F)	118 mm (4.7 inches)	82%	moderate
April Weather	7°C (45°F)	159 mm (6.3 inches)	80%	very high
May Weather	12°C (54°F)	110 mm (4.3 inches)	72%	very high
June Weather	17°C (63°F)	94 mm (3.7 inches)	72%	very high
July Weather	21°C (70°F)	104 mm (4.1 inches)	67%	very high
August Weather	21°C (71°F)	66 mm (2.6 inches)	66%	very high
September Weather	19°C (66°F)	107 mm (4.2 inches)	71%	high
October Weather	14°C (58°F)	182 mm (7.2 inches)	78%	high
November Weather	8°C (46°F)	115 mm (4.5 inches)	84%	moderate
December Weather	3°C (38°F)	147 mm (5.8 inches)	81%	low