January Weather in Salem, United States

Last updated: June 24, 2025

In Salem, United States, the average temperature in January hovers around -2°C (29°F). Expect a minimum chill of -22°C (-8°F) and a maximum warmth of 20°C (68°F). During this month, 68 mm (2.7 in) of precipitation typically falls over 8 days, contributing to an average humidity level of 86%.

January Temperature in Salem

In January in Salem, the average temperature is -2°C (29°F), with maximums reaching 20°C (68°F) and minimums dropping as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and unexpectedly warm days.

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

The chart illustrates January temperature patterns in Salem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Salem, January typically has an average temperature of -2°C (29°F), with highs reaching up to 20°C (68°F) and lows dropping to around -22°C (-8°F).

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

January Precipitation in Salem

In Salem in January, the precipitation amount is 68 mm (2.7 in) spread over 8 days.

January Precipitation Trends in Salem

The chart displays monthly precipitation patterns in Salem, 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 Salem, January typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 8 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 Salem

In Salem in January humidity is 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

January Average Humidity in Salem

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

In Salem 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 Salem, you can visit Hourly UV Index in Salem.

Maximum UV Index Levels in Salem for January

The chart shows the monthly maximum UV Index (UVI) for Salem 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 Salem typically reaches 2, which falls under the low exposure category.

Data source: Salem 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 Salem Compares to Other Months

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

This table compares monthly weather conditions in Salem, 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 (29°F)	68 mm (2.7 inches)	86%	low
February Weather	0°C (32°F)	84 mm (3.3 inches)	84%	moderate
March Weather	3°C (37°F)	85 mm (3.3 inches)	82%	moderate
April Weather	9°C (48°F)	127 mm (5.0 inches)	80%	very high
May Weather	15°C (59°F)	82 mm (3.2 inches)	72%	very high
June Weather	20°C (69°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (74°F)	131 mm (5.2 inches)	67%	very high
August Weather	23°C (74°F)	77 mm (3.0 inches)	66%	very high
September Weather	19°C (66°F)	73 mm (2.9 inches)	71%	high
October Weather	13°C (55°F)	128 mm (5.0 inches)	78%	high
November Weather	5°C (42°F)	95 mm (3.7 inches)	84%	moderate
December Weather	0°C (32°F)	121 mm (4.8 inches)	81%	low