January Weather in Merrimac, United States

Last updated: June 24, 2025

In January, the average temperature in Merrimac, United States hovers around 2°C (35°F). Temperatures can vary significantly, with minimums dropping to -20°C (-3°F) and maximums peaking at 20°C (69°F). Expect 68 mm (2.7 in) of precipitation over approximately 9 days, accompanied by a high average humidity of 87%.

January Temperature in Merrimac

In January in Merrimac, the average temperature is 2°C (35°F). The maximum can reach 20°C (69°F), and the minimum can be as low as -20°C (-3°F). Travelers should prepare for a wide range of temperatures and pack accordingly for both warm days and cold nights.

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

The chart illustrates January temperature patterns in Merrimac, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merrimac, January typically has an average temperature of 2°C (35°F), with highs reaching up to 20°C (69°F) and lows dropping to around -20°C (-3°F).

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

January Precipitation in Merrimac

In Merrimac in January, the precipitation amount is 68 mm (2.7 in) spread over 9 days.

January Precipitation Trends in Merrimac

The chart displays monthly precipitation patterns in Merrimac, 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 Merrimac, January typically receives around 68 mm (2.7 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 Merrimac

In Merrimac in January, humidity is 87%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling feel uncomfortable and heavy, as each breath carries a hint of the cold, moist air that lingers around you.

January Average Humidity in Merrimac

This chart illustrates the average monthly humidity levels in Merrimac, 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 Merrimac is approximately 87%, 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 Merrimac

In Merrimac in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Merrimac, you can check the information here.

Maximum UV Index Levels in Merrimac for January

The chart shows the monthly maximum UV Index (UVI) for Merrimac 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 Merrimac typically reaches 3, which falls under the moderate exposure category.

Data source: Merrimac 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 Merrimac Compares to Other Months

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

This table compares monthly weather conditions in Merrimac, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	68 mm (2.7 inches)	87%	moderate
February Weather	5°C (41°F)	113 mm (4.4 inches)	87%	high
March Weather	7°C (46°F)	85 mm (3.3 inches)	86%	very high
April Weather	12°C (54°F)	104 mm (4.1 inches)	84%	very high
May Weather	17°C (63°F)	115 mm (4.5 inches)	83%	extreme
June Weather	21°C (70°F)	83 mm (3.3 inches)	83%	extreme
July Weather	23°C (74°F)	57 mm (2.3 inches)	79%	extreme
August Weather	22°C (73°F)	74 mm (2.9 inches)	66%	very high
September Weather	20°C (68°F)	95 mm (3.7 inches)	68%	very high
October Weather	14°C (58°F)	96 mm (3.8 inches)	78%	high
November Weather	6°C (44°F)	63 mm (2.5 inches)	89%	moderate
December Weather	4°C (40°F)	87 mm (3.4 inches)	86%	moderate