August is one of the warmer months of the year in Bentonville, with average highs near 33.2°C and lows around 20.6°C (mean 26.9°C). It is about average for rainfall, averaging 91 mm of rainfall and 64% relative humidity across the period.
August is one of the warmer months of the year in Bentonville. Across 45 years of records, the warmest August in Bentonville was 2000 — when the month averaged 30.2°C — while the coldest was 1992 at 23°C. Typical August days reach 33.2°C with nights near 20.6°C. The long-term August temperature trend is broadly flat.
August is about average for rainfall in Bentonville, averaging 91 mm of rainfall. The wettest August on record was 2019 with 180 mm, while the driest was 2000 at 2 mm.
Relative humidity in Bentonville during August averages 64%. The most humid August was 2019 at 79%, and the least humid was 2000 at 47%.
August receives about 5.9 kWh/m²/day of solar energy in Bentonville. The sunniest August was 2000 at 6.7 kWh/m²/day, and the cloudiest was 2019 at 4.9.
Average wind speed in Bentonville during August is 1.2 m/s. The windiest Augusts were 2010, 2012 and 2018, among others at 1.4 m/s, while the calmest were 1991, 2013 and 2019 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.8°C | 26.6°C | 27.3°C | 26.7°C | 27.3°C | +0.5°C |
| Avg High | 33.2°C | 33.2°C | 33.5°C | 32.6°C | 33.7°C | +0.5°C |
| Avg Low | 20.4°C | 20.0°C | 21.0°C | 20.8°C | 20.9°C | +0.5°C |
| Avg Rain | 101 mm | 78 mm | 86 mm | 106 mm | 83 mm | -18 mm |
August temperatures in Bentonville have risen by about 0.4°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 10.3°C (1986) to a record high of 44.5°C (2011).
Rainfall in August is about average for rainfall, averaging 91 mm, with a wettest year of 180 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
One of the best times to visit Bentonville
August is one of the best times to visit Bentonville. Expect days averaging 33.2°C and nights around 20.6°C (mean 26.9°C) — warmer than Bentonville's yearly average — with higher rainfall (91 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 34.1°C | 27.4°C | 20.7°C | 39.5°C | 14.4°C | 79 mm | 58% | 1.2 m/s | 5.8 |
| 2024 | 34.8°C | 27.9°C | 21.1°C | 39.6°C | 15.7°C | 80 mm | 59% | 1.2 m/s | 5.9 |
| 2023 | 34.8°C | 28.0°C | 21.3°C | 41.1°C | 13.8°C | 127 mm | 65% | 1.2 m/s | 6.4 |
| 2022 | 32.3°C | 26.5°C | 20.7°C | 37.3°C | 16.6°C | 96 mm | 70% | 1.1 m/s | 6.3 |
| 2021 | 33.6°C | 27.7°C | 21.9°C | 38.4°C | 18.0°C | 47 mm | 67% | 1.3 m/s | 5.9 |
| 2020 | 32.5°C | 26.0°C | 19.5°C | 36.4°C | 14.2°C | 72 mm | 67% | 1.2 m/s | 6.1 |
| 2019 🌧️ | 30.7°C | 26.0°C | 21.3°C | 36.8°C | 14.8°C | 180 mm | 79% | 1 m/s | 4.9 |
| 2018 | 31.0°C | 25.9°C | 20.8°C | 36.0°C | 17.4°C | 149 mm | 73% | 1.4 m/s | 5.3 |
| 2017 | 29.9°C | 24.4°C | 18.9°C | 33.3°C | 14.1°C | 140 mm | 73% | 1.2 m/s | 5.4 |
| 2016 | 32.5°C | 27.0°C | 21.5°C | 38.3°C | 13.6°C | 62 mm | 71% | 1.2 m/s | 5.7 |
| 2015 | 30.1°C | 24.6°C | 19.0°C | 36.7°C | 12.0°C | 130 mm | 72% | 1.1 m/s | 5.8 |
| 2014 | 33.7°C | 27.1°C | 20.5°C | 38.6°C | 14.2°C | 52 mm | 63% | 1.2 m/s | 6.4 |
| 2013 | 30.4°C | 25.0°C | 19.6°C | 37.0°C | 13.1°C | 129 mm | 76% | 1 m/s | 5.7 |
| 2012 | 34.2°C | 27.3°C | 20.4°C | 43.2°C | 15.0°C | 90 mm | 51% | 1.4 m/s | 5.9 |
| 2011 | 36.7°C | 30.0°C | 23.3°C | 44.5°C | 17.0°C | 99 mm | 57% | 1.3 m/s | 5.9 |
| 2010 | 36.8°C | 29.8°C | 22.8°C | 40.6°C | 14.6°C | 36 mm | 56% | 1.4 m/s | 6.6 |
| 2009 | 31.2°C | 25.0°C | 18.8°C | 38.1°C | 10.3°C | 114 mm | 69% | 1.4 m/s | 6 |
| 2008 | 30.2°C | 24.9°C | 19.6°C | 38.7°C | 15.6°C | 137 mm | 75% | 1.1 m/s | 5.4 |
| 2007 | 34.7°C | 28.7°C | 22.7°C | 40.2°C | 17.9°C | 72 mm | 65% | 1.3 m/s | 6.1 |
| 2006 | 34.4°C | 28.5°C | 22.6°C | 39.3°C | 14.9°C | 112 mm | 63% | 1.3 m/s | 5.8 |
| 2005 | 33.6°C | 27.8°C | 21.9°C | 38.2°C | 18.0°C | 98 mm | 65% | 1.1 m/s | 5.9 |
| 2004 | 29.6°C | 23.5°C | 17.4°C | 35.3°C | 11.0°C | 52 mm | 70% | 1.4 m/s | 5.9 |
| 2003 | 35.3°C | 28.8°C | 22.2°C | 40.5°C | 17.5°C | 134 mm | 58% | 1.1 m/s | 5.8 |
| 2002 | 33.5°C | 27.1°C | 20.7°C | 37.3°C | 16.4°C | 81 mm | 64% | 1.3 m/s | 5.8 |
| 2001 | 35.1°C | 28.2°C | 21.3°C | 38.3°C | 15.4°C | 60 mm | 57% | 1.3 m/s | 6.1 |
| 2000 🔥 | 37.6°C | 30.2°C | 22.8°C | 41.0°C | 17.9°C | 2 mm | 47% | 1.4 m/s | 6.7 |
| 1999 | 35.9°C | 28.0°C | 20.1°C | 40.5°C | 15.5°C | 39 mm | 51% | 1.3 m/s | 6.5 |
| 1998 | 35.1°C | 28.3°C | 21.4°C | 39.1°C | 18.0°C | 71 mm | 59% | 1.2 m/s | 6 |
| 1997 | 30.3°C | 24.7°C | 19.0°C | 36.4°C | 13.1°C | 159 mm | 69% | 1.2 m/s | 5.4 |
| 1996 | 32.3°C | 26.2°C | 20.0°C | 36.7°C | 16.1°C | 79 mm | 65% | 1.1 m/s | 5.6 |
| 1995 | 35.5°C | 28.9°C | 22.2°C | 39.4°C | 17.4°C | 35 mm | 59% | 1.1 m/s | 6.2 |
| 1994 | 32.3°C | 25.2°C | 18.2°C | 36.3°C | 12.4°C | 108 mm | 64% | 1.2 m/s | 6.1 |
| 1993 | 33.2°C | 27.2°C | 21.3°C | 38.2°C | 14.0°C | 84 mm | 67% | 1.2 m/s | 5.9 |
| 1992 ❄️ | 29.1°C | 23.0°C | 16.9°C | 33.2°C | 11.0°C | 65 mm | 71% | 1.1 m/s | 5.5 |
| 1991 | 33.7°C | 27.0°C | 20.2°C | 39.7°C | 13.4°C | 78 mm | 58% | 1 m/s | 5.8 |
| 1990 | 34.3°C | 27.4°C | 20.4°C | 39.7°C | 13.6°C | 59 mm | 61% | 1.2 m/s | 6.1 |
| 1989 | 32.0°C | 26.0°C | 20.0°C | 36.1°C | 11.3°C | 92 mm | 67% | 1.2 m/s | 5.9 |
| 1988 | 33.8°C | 27.4°C | 21.1°C | 38.9°C | 11.3°C | 81 mm | 62% | 1.2 m/s | 5.7 |
| 1987 | 34.1°C | 27.7°C | 21.3°C | 39.7°C | 12.8°C | 127 mm | 61% | 1.4 m/s | 5.9 |
| 1986 | 31.0°C | 24.6°C | 18.3°C | 34.8°C | 10.3°C | 120 mm | 63% | 1.2 m/s | 5.6 |
| 1985 | 32.1°C | 25.8°C | 19.5°C | 36.7°C | 13.7°C | 156 mm | 69% | 1.2 m/s | 5.9 |
| 1984 | 34.2°C | 27.1°C | 20.1°C | 39.3°C | 14.2°C | 67 mm | 58% | 1.2 m/s | 5.5 |
| 1983 | 36.9°C | 30.1°C | 23.2°C | 39.5°C | 20.5°C | 51 mm | 53% | 1.1 m/s | — |
| 1982 | 34.4°C | 27.8°C | 21.1°C | 38.2°C | 17.9°C | 84 mm | 64% | 1.4 m/s | — |
| 1981 | 30.4°C | 24.6°C | 18.8°C | 34.3°C | 13.2°C | 134 mm | 71% | 1.2 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 33.2°C with lows near 20.6°C (mean 26.9°C), based on 45 years of NASA POWER data.
August averages 91 mm of rainfall in Bentonville, about average for rainfall. The wettest on record was 180 mm in 2019.
The hottest August reached 44.5°C in 2011. The coldest dipped to 10.3°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.4°C. Daytime highs moved from 33.6°C to 33.9°C and overnight lows from 20.5°C to 21.1°C over the same span.
August is one of the warmer months of the year in Bentonville and about average for rainfall, so plan for around 33.2°C daytime highs and 20.6°C at night.
Not quite — August is the 11th coolest month in Bentonville, averaging 26.9°C.
For August in Bentonville, pack light, breathable clothing and sun protection, with typical highs of 33.2°C and lows of 20.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 64% — moderately humid.
Average wind speed in August is 1.2 m/s. The windiest August on record averaged 1.4 m/s (1982).
The wettest August on record was 2019 with 180 mm. On average, August sees 91 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Bentonville behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.
