January Weather in Martinsville, United States

Last updated: June 24, 2025

In January, the average temperature in Martinsville, United States hovers around -1°C (31°F), yet can vary significantly with a minimum of -29°C (-19°F) and a maximum reaching 18°C (65°F). This month sees 86 mm (3.4 in) of precipitation spread across 9 days, and an average humidity of 87% fills the air, making it a chilly, damp time of year.

January Temperature in Martinsville

In January in Martinsville, the average temperature is -1°C (31°F). The maximum can reach 18°C (65°F) and the minimum can be as low as -29°C (-19°F). Be prepared for a wide range of temperatures while traveling, and pack accordingly to enjoy your trip comfortably.

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

The chart illustrates January temperature patterns in Martinsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Martinsville, January typically has an average temperature of -1°C (31°F), with highs reaching up to 18°C (65°F) and lows dropping to around -29°C (-19°F).

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

January Precipitation in Martinsville

In Martinsville in January, the precipitation amount is 86 mm (3.4 in), falling over the course of 9 days.

January Precipitation Trends in Martinsville

The chart displays monthly precipitation patterns in Martinsville, 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 Martinsville, January typically receives around 86 mm (3.4 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 Martinsville

In Martinsville in January humidity is 87%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps through your clothes, making traveling incredibly uncomfortable as it adds a layer of dampness to the already cold air, leaving you shivering and wishing for warmth.

January Average Humidity in Martinsville

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

In Martinsville 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 Martinsville, you can check the information here.

Maximum UV Index Levels in Martinsville for January

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

Data source: Martinsville 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 Martinsville Compares to Other Months

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

This table compares monthly weather conditions in Martinsville, 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 (31°F)	86 mm (3.4 inches)	87%	moderate
February Weather	1°C (34°F)	96 mm (3.8 inches)	85%	moderate
March Weather	6°C (43°F)	129 mm (5.1 inches)	86%	high
April Weather	11°C (53°F)	102 mm (4.0 inches)	84%	very high
May Weather	18°C (65°F)	131 mm (5.2 inches)	79%	very high
June Weather	23°C (74°F)	121 mm (4.8 inches)	82%	extreme
July Weather	25°C (77°F)	108 mm (4.3 inches)	79%	very high
August Weather	23°C (74°F)	107 mm (4.2 inches)	70%	very high
September Weather	21°C (70°F)	74 mm (2.9 inches)	69%	very high
October Weather	14°C (58°F)	100 mm (3.9 inches)	76%	high
November Weather	5°C (42°F)	98 mm (3.8 inches)	88%	moderate
December Weather	3°C (37°F)	88 mm (3.5 inches)	87%	moderate