January Weather in Salem, United States

Last updated: June 24, 2025

In Salem, United States, the average temperature in January hovers around 5°C (41°F). During this time, temperatures can dip as low as -13°C (10°F) or rise to a pleasant 23°C (74°F). Expect to experience 97 mm (3.8 in) of precipitation over 9 days, with average humidity levels reaching a notable 86%. Be prepared for a mix of chilly days and occasional warmth!

January Temperature in Salem

In January in Salem, the average temperature is 5°C (41°F), with maximums reaching up to 23°C (74°F) and minimums dropping as low as -13°C (10°F). This variation in temperature makes Salem an exciting destination for travelers seeking both chilly adventures and mild 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 5°C (41°F), with highs reaching up to 23°C (74°F) and lows dropping to around -13°C (10°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 total precipitation amount reaches 97 mm (3.8 in) over the course of 9 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 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 Salem

In Salem in January humidity is 86%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite challenging due to the chill combined with the stickiness in the air.

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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Salem for better planning.

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 4, which falls under the moderate 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	5°C (41°F)	97 mm (3.8 inches)	86%	moderate
February Weather	8°C (46°F)	120 mm (4.7 inches)	85%	high
March Weather	10°C (51°F)	100 mm (3.9 inches)	84%	very high
April Weather	15°C (59°F)	137 mm (5.4 inches)	82%	very high
May Weather	19°C (67°F)	137 mm (5.4 inches)	83%	very high
June Weather	23°C (73°F)	81 mm (3.2 inches)	82%	extreme
July Weather	25°C (78°F)	66 mm (2.6 inches)	80%	extreme
August Weather	24°C (76°F)	95 mm (3.7 inches)	74%	very high
September Weather	22°C (72°F)	128 mm (5.0 inches)	75%	very high
October Weather	17°C (62°F)	151 mm (5.9 inches)	79%	very high
November Weather	9°C (49°F)	84 mm (3.3 inches)	87%	moderate
December Weather	7°C (44°F)	116 mm (4.6 inches)	87%	moderate