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Salem Weather by Month

Average temperatures, rainfall and humidity for Salem, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Salem month looks like before you travel — then check the live Salem forecast for the days ahead.

Warmest month

August

30°C average high

Coolest month

January

3°C average low

Wettest month

December

127 mm of rain

Driest month

July

8 mm of rain

Average temperature and rainfall in Salem by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January9°C3°C-9°C / 18°C
96 mm
84%10 km/h
February10°C3°C-7°C / 18°C
91 mm
82%11 km/h
March14°C4°C-4°C / 24°C
90 mm
77%11 km/h
April17°C6°C-1°C / 32°C
72 mm
71%11 km/h
May21°C9°C1°C / 33°C
47 mm
68%9 km/h
June25°C11°C5°C / 45°C
36 mm
64%10 km/h
July30°C13°C7°C / 39°C
8 mm
59%10 km/h
August30°C14°C8°C / 41°C
13 mm
61%9 km/h
September25°C12°C4°C / 37°C
58 mm
68%9 km/h
October18°C8°C-2°C / 31°C
82 mm
78%9 km/h
November12°C5°C-8°C / 20°C
102 mm
85%10 km/h
December9°C3°C-13°C / 17°C
127 mm
86%10 km/h

Best time to visit Salem

The most comfortable time to visit Salem is generally May to June and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around December, totalling about 823 mm a year.

Travellers who prefer heat should aim for August, when highs average 30°C. December is the month to avoid if rain would spoil your plans — it averages 127 mm, roughly 16× the rainfall of the driest month (July).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Salem forecast for what is happening now.

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