Fort Smith, AR weather in August
In August, Fort Smith sees highs around 94°F and lows around 71°F: hot and oppressively humid, with some rain. There are about 7 days with rain. It is one of the warmest months in Fort Smith. Plan outdoor time for mornings and evenings.
- Normal high
- 94°F
- Normal low
- 71°F
- Wet days
- 7
- 3.6 in total
- Muggy days
- 26
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 95°F | 91°F |
| Normal low | 72°F | 68°F |
| Chance of a wet day | 23% | 23% |
| Sunrise / sunset | 6:26 am / 8:21 pm | 6:49 am / 7:46 pm |
| Daylight | 13.9 h | 12.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am72°Fdew point 69°F
- 9 am81°Fdew point 70°F
- Noon88°Fdew point 69°F
- 3 pm91°Fdew point 67°F
- 6 pm88°Fdew point 68°F
- 9 pm80°Fdew point 69°F
NOAA hourly normals (local standard time) from Ft Smith Rgnl Airport (4 mi away); average wind 6 mph; clear or few clouds in 75% of daytime hours, mostly cloudy or overcast in 17%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Hot dayshigh 90°F or more23 of 31
- Muggy daysdaily mean dew point 65°F or more26 of 31
- Wet daysat least 0.01 in of rain or melted snow7 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.6 in; a dry August brings about 1.8 in and a wet one about 4.4 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202000: average high 102°F
- Coolest August1992: average high 87°F
- Wettest August2019: 11.7 in
- Driest August2000: no measurable precipitation
- Highest reading115°F (August 3, 2011)
- Lowest reading53°F (August 28, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 94°F | 94°F | 87°F |
| Normal low | 72°F | 71°F | 63°F |
| Wet days | 7 | 7 | 7 |
| Comfortable days | 0 | 0 | 4 |
| Daylight | 14.3 h | 13.5 h | 12.4 h |
Highs change by 0°F from July and -7°F into September.
Nearby alternatives in August
- Cooler: Olathe, KS243 mi · high 87°F · 8 wet days
How Fort Smith ranks in August
- Normal high67th warmest of 378 cities; 1st of 4 in Arkansas
- Wet days142nd driest of 378
- Comfortable days227th most of 341
What to pack for Fort Smith in August
- Light, breathable clothing – highs near 94°F and about 26 muggy days
Heating and cooling
August has 0 heating degree days and 536 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How hot is Fort Smith in August?
The normal high is 94°F and the normal low is 71°F. From 1991 to 2020 the hottest August reading was 115°F (August 3, 2011).
Does it rain a lot in Fort Smith in August?
About 7 days in August have at least 0.01 in of precipitation, and the normal total is 3.6 in. The wettest August in 1991-2020 was in 2019 (11.7 in); the driest was in 2000, with no measurable precipitation.
Is August a good time to visit Fort Smith?
August ranks 12th of 12 months on our comfort score for Fort Smith (38 out of 100). It has almost no comfortable days and about 23 days at 90°F or hotter. The best month is April.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Ft Smith Rgnl Airport (USW00013964), 4.2 mi SSE of the city center, 449 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Fort Smith Regional Airport (723440-13964), 4.1 mi SSE of the city center, 448 ft . Hourly observations, 1991-2020.