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Weather by month

Fort Smith Weather by Month

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

Warmest month

July

34°C average high

Coolest month

January

-1°C average low

Wettest month

May

156 mm of rain

Driest month

February

29 mm of rain

Average temperature and rainfall in Fort Smith by month

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

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	10°C	-1°C	-18°C / 25°C	31 mm	66%	13 km/h
February	13°C	1°C	-22°C / 30°C	29 mm	64%	15 km/h
March	19°C	7°C	-15°C / 35°C	48 mm	61%	17 km/h
April	23°C	11°C	-3°C / 32°C	73 mm	64%	17 km/h
May	26°C	16°C	3°C / 34°C	156 mm	72%	14 km/h
June	32°C	21°C	12°C / 38°C	80 mm	70%	13 km/h
July	34°C	23°C	10°C / 42°C	51 mm	69%	12 km/h
August	34°C	22°C	12°C / 41°C	47 mm	69%	11 km/h
September	31°C	19°C	7°C / 38°C	42 mm	68%	12 km/h
October	24°C	12°C	-3°C / 34°C	68 mm	66%	13 km/h
November	18°C	6°C	-13°C / 31°C	47 mm	67%	14 km/h
December	13°C	2°C	-17°C / 29°C	38 mm	68%	13 km/h

Best time to visit Fort Smith

The most comfortable time to visit Fort Smith is generally March to April and October, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around May, totalling about 711 mm a year.

Travellers who prefer heat should aim for July, when highs average 34°C. May is the month to avoid if rain would spoil your plans — it averages 156 mm, roughly 5× the rainfall of the driest month (February).

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