Climate averages 1991–2020
Fort Smith weather
in August.
A hot, moderately wet month: the 2nd warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Fort Smith: daytime highs average 32.8°C and nights cool to about 22.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 63 mm of rain on roughly 8 days, which makes August a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 13 h 29 min on an average August day.
The nearest other city in this atlas is Fayetteville, United States (78 km away). In August its highs average 30.8°C, 2.0°C cooler than Fort Smith, with 75 mm of rain.
Among the 498 cities listed in the United States, Fort Smith ranks joint 106th of 498 for the warmest August highs and joint 218th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Fort Smith is 2.9°C warmer than that mean.
From August to September, average highs fall by 3.9°C to 28.9°C, and monthly rainfall rises from 63 mm to 93 mm.
The annual picture
August in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Fort Smith climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.5°C-0.1°C | -0.1°C | 84 | 8.9 | 10.110 h |
| February | 12.3°C1.8°C | 1.8°C | 85 | 8.5 | 10.911 h |
| March | 17.0°C6.0°C | 6.0°C | 125 | 11.3 | 11.912 h |
| April | 21.6°C10.7°C | 10.7°C | 149 | 11.3 | 13.113 h |
| May | 25.9°C16.0°C | 16.0°C | 148 | 12.9 | 14.014 h |
| June | 30.5°C20.8°C | 20.8°C | 92 | 10.3 | 14.515 h |
| July | 33.0°C23.1°C | 23.1°C | 78 | 8.8 | 14.314 h |
| August, selected | 32.8°C22.7°C | 22.7°C | 63 | 8.3 | 13.513 h |
| September | 28.9°C18.6°C | 18.6°C | 93 | 7.4 | 12.412 h |
| October | 22.7°C12.4°C | 12.4°C | 108 | 9.0 | 11.311 h |
| November | 15.9°C6.2°C | 6.2°C | 110 | 8.7 | 10.310 h |
| December | 10.7°C1.6°C | 1.6°C | 96 | 8.9 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Fayetteville, United States in AugustUnited States · 78 kmHigh 30.8°C · Low 21.2°C · 75 mm rain
- Springdale in AugustUnited States · 92 kmHigh 30.8°C · Low 21.3°C · 75 mm rain
- Broken Arrow in AugustUnited States · 146 kmHigh 32.6°C · Low 23.3°C · 71 mm rain
- Tulsa in AugustUnited States · 167 kmHigh 32.8°C · Low 23.5°C · 73 mm rain
- Little Rock in AugustUnited States · 205 kmHigh 32.8°C · Low 23.3°C · 70 mm rain
- Springfield (Missouri), United States in AugustUnited States · 226 kmHigh 30.6°C · Low 20.6°C · 83 mm rain
- Norman in AugustUnited States · 277 kmHigh 33.2°C · Low 23.8°C · 57 mm rain
- Edmond in AugustUnited States · 280 kmHigh 33.3°C · Low 23.5°C · 66 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Fort Smith) is explained once on the Fort Smith year overview and on the Sources, method and limits page.