January Weather in Salem, United States

Last updated: June 24, 2025

In January, the average temperature in Salem, United States is a brisk 1°C (34°F), with a minimum plunge as low as -19°C (-2°F) and a maximum reaching up to 20°C (68°F). Expect about 75 mm (3.0 in) of precipitation spread over 8 days, and experience a notably high average humidity of 83%.

January Temperature in Salem

In January in Salem, the average temperature is 1°C (34°F). Maximums can reach 20°C (68°F) and minimums can be as low as -19°C (-2°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 1°C (34°F), with highs reaching up to 20°C (68°F) and lows dropping to around -19°C (-2°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 is 75 mm (3.0 in) over the course of 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 75 mm (3.0 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 83%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making travel uncomfortable as the damp cold seeps into your bones, adding an extra layer of heaviness to the air that can leave you feeling sluggish and fatigued.

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 83%, 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 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 Salem, you can check the information here.

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 3, 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	1°C (34°F)	75 mm (3.0 inches)	83%	moderate
February Weather	3°C (37°F)	96 mm (3.8 inches)	81%	high
March Weather	9°C (48°F)	136 mm (5.3 inches)	80%	high
April Weather	12°C (55°F)	152 mm (6.0 inches)	80%	very high
May Weather	18°C (66°F)	178 mm (7.0 inches)	83%	very high
June Weather	24°C (75°F)	84 mm (3.3 inches)	83%	extreme
July Weather	26°C (79°F)	84 mm (3.3 inches)	76%	extreme
August Weather	24°C (76°F)	101 mm (4.0 inches)	69%	very high
September Weather	22°C (72°F)	59 mm (2.3 inches)	68%	very high
October Weather	15°C (58°F)	112 mm (4.4 inches)	72%	high
November Weather	7°C (45°F)	69 mm (2.7 inches)	83%	moderate
December Weather	4°C (40°F)	60 mm (2.4 inches)	86%	moderate