World Resorts USA Fort Smith Weather

Fort Smith weather in September

Weather in Fort Smith: September

Average day temperature: 85.9°F
Average night temperature: 67.5°F
Number of sunny days: 18 days
Day length: 11.8 - 12.9 hours
Number of rainy days: 1 day
Precipitation totals: 0.9 in.

Air temperature in September, °F

Show year:
2025
2024
2023

The highest day temperature during September of 2025 was 95°F. At the same time the lowest night temperature was 57°F. Daily and nightly averages during September were 85.4°F and 67.1°F.

Sunny, partly cloudy and cloudy days

Mostly all days in September are sunny but cloudy days are also possible.

Precipitation total in September, in.

Precipitation total value in Fort Smith in September is 0.9 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 4.6 mph It makes September one of the least windy months of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 9.1.

Best time for vacation in Fort Smith

Sunniest months:
October 20 days
September 18 days
August 18 days
Warmest months:
July 91.8 °F
August 91.3 °F
June 86.7 °F
Coldest months:
January 46.2 °F
February 50.1 °F
December 52.5 °F
Rainiest months:
May 7 days
April 4 days
March 3 days
Windiest months:
March 6.7 mph
April 6.6 mph
February 5.8 mph

Fort Smith on a weather map

Fort Smith
+37°F
N 2 mph
Feels like: +34°F
Precip.: 0%
Places in USA:
Name
°F
+30°F
+75°F
+75°F
+41°F
+52°F
+70°F
+77°F
+70°F
+23°F
+54°F
+46°F
+61°F
+61°F
+45°F
+3°F
24 Hours Forecast
Fort Smith
Local time: 03:07
December 05, friday
0600
37°F
NW
2 mph
0900
32°F
W
2 mph
1200
39°F
N
2 mph
1500
46°F
NE
2 mph
1800
46°F
W
2 mph
2100
41°F
NW
2 mph
December 06, saturday
0000
37°F
W
2 mph
0300
36°F
W
2 mph
Units of measurement: °C / °F