August is one of the warmer months of the year in Oklahoma City, with average highs near 34.1°C and lows around 22.2°C (mean 28.2°C). It is about average for rainfall, averaging 83 mm of rainfall and 59% relative humidity across the period.
August is one of the warmer months of the year in Oklahoma City. Across 45 years of records, the warmest August in Oklahoma City was 2011 — when the month averaged 33.3°C — while the coldest was 1992 at 23.6°C. Typical August days reach 34.1°C with nights near 22.2°C. The long-term trend is warming, about 0.2°C per decade.
August is about average for rainfall in Oklahoma City, averaging 83 mm of rainfall. The wettest August on record was 2017 with 175 mm, while the driest was 2000 at 1 mm.
Relative humidity in Oklahoma City during August averages 59%. The most humid August was 2007 at 79%, and the least humid was 2000 at 38%.
August receives about 6.2 kWh/m²/day of solar energy in Oklahoma City. The sunniest August was 2000 at 6.9 kWh/m²/day, and the cloudiest were 1992 and 1996 at 5.5.
Average wind speed in Oklahoma City during August is 2.7 m/s. The windiest August was 2000 at 3.5 m/s, while the calmest was 2008 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.8°C | 27.6°C | 28.4°C | 28.5°C | 28.8°C | +1°C |
| Avg High | 33.8°C | 33.6°C | 34.2°C | 34.4°C | 34.9°C | +1.1°C |
| Avg Low | 21.8°C | 21.6°C | 22.6°C | 22.5°C | 22.6°C | +0.8°C |
| Avg Rain | 70 mm | 85 mm | 104 mm | 78 mm | 73 mm | +3 mm |
August temperatures in Oklahoma City have risen by about 0.6°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 11.7°C (1989) to a record high of 46.6°C (2012).
Rainfall in August is about average for rainfall, averaging 83 mm, with a wettest year of 175 mm.
A good time to visit Oklahoma City
August is a good time to visit Oklahoma City, with days averaging 34.1°C and nights around 22.2°C (mean 28.2°C, warmer than Oklahoma City's yearly average) and higher rainfall. September and May are marginally more temperate, but August still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.3°C | 27.1°C | 21.8°C | 37.3°C | 17.3°C | 108 mm | 69% | 2.5 m/s | 5.6 |
| 2024 | 36.7°C | 30.1°C | 23.5°C | 41.4°C | 19.0°C | 106 mm | 53% | 2.8 m/s | 6.4 |
| 2023 | 37.6°C | 30.4°C | 23.3°C | 42.5°C | 17.2°C | 49 mm | 49% | 2.6 m/s | 6.7 |
| 2022 | 35.7°C | 29.5°C | 23.4°C | 40.3°C | 19.5°C | 58 mm | 56% | 2.6 m/s | 6.1 |
| 2021 | 33.4°C | 28.0°C | 22.6°C | 37.4°C | 17.3°C | 53 mm | 67% | 2.9 m/s | 6.1 |
| 2020 | 33.7°C | 27.5°C | 21.2°C | 40.1°C | 16.8°C | 67 mm | 62% | 2.5 m/s | 6.6 |
| 2019 | 33.2°C | 28.2°C | 23.1°C | 37.7°C | 18.2°C | 158 mm | 72% | 2.7 m/s | 5.7 |
| 2018 | 33.1°C | 27.6°C | 22.1°C | 37.3°C | 17.1°C | 105 mm | 65% | 2.9 m/s | 6.1 |
| 2017 🌧️ | 31.0°C | 25.7°C | 20.5°C | 35.6°C | 15.3°C | 175 mm | 71% | 2.4 m/s | 5.8 |
| 2016 | 33.6°C | 28.2°C | 22.7°C | 38.9°C | 15.7°C | 32 mm | 62% | 2.7 m/s | 6.1 |
| 2015 | 31.3°C | 25.8°C | 20.2°C | 36.8°C | 14.1°C | 40 mm | 68% | 2.5 m/s | 5.9 |
| 2014 | 35.6°C | 29.0°C | 22.4°C | 39.7°C | 17.0°C | 24 mm | 54% | 2.8 m/s | 6.7 |
| 2013 | 33.0°C | 27.3°C | 21.5°C | 39.2°C | 16.6°C | 85 mm | 66% | 2.5 m/s | 6.4 |
| 2012 | 36.2°C | 29.3°C | 22.3°C | 46.6°C | 15.5°C | 66 mm | 46% | 3 m/s | 6.4 |
| 2011 🔥 | 40.5°C | 33.3°C | 26.2°C | 45.0°C | 19.8°C | 55 mm | 41% | 2.9 m/s | 6.3 |
| 2010 | 36.8°C | 30.2°C | 23.7°C | 41.2°C | 14.2°C | 37 mm | 52% | 2.9 m/s | 6.8 |
| 2009 | 32.3°C | 26.6°C | 20.9°C | 37.3°C | 12.9°C | 140 mm | 65% | 3 m/s | 6.6 |
| 2008 | 32.2°C | 26.8°C | 21.4°C | 40.7°C | 16.8°C | 137 mm | 68% | 2.3 m/s | 5.6 |
| 2007 | 31.6°C | 27.0°C | 22.3°C | 35.6°C | 18.5°C | 156 mm | 79% | 3 m/s | 6.5 |
| 2006 | 35.8°C | 30.1°C | 24.4°C | 42.2°C | 16.8°C | 89 mm | 54% | 2.7 m/s | 6.3 |
| 2005 | 33.3°C | 27.8°C | 22.4°C | 38.5°C | 18.9°C | 158 mm | 65% | 2.4 m/s | 6 |
| 2004 | 31.2°C | 25.3°C | 19.5°C | 36.8°C | 14.2°C | 104 mm | 64% | 2.7 m/s | 6.1 |
| 2003 | 36.6°C | 30.3°C | 23.9°C | 40.5°C | 19.6°C | 101 mm | 51% | 2.5 m/s | 6 |
| 2002 | 34.6°C | 28.5°C | 22.4°C | 38.0°C | 14.8°C | 88 mm | 57% | 2.9 m/s | 6.4 |
| 2001 | 35.5°C | 29.4°C | 23.4°C | 40.1°C | 19.6°C | 66 mm | 54% | 2.6 m/s | 6.3 |
| 2000 | 39.2°C | 32.0°C | 24.9°C | 40.8°C | 19.7°C | 1 mm | 38% | 3.5 m/s | 6.9 |
| 1999 | 37.0°C | 30.2°C | 23.4°C | 41.0°C | 17.0°C | 30 mm | 47% | 2.8 m/s | 6.8 |
| 1998 | 37.0°C | 30.4°C | 23.9°C | 41.1°C | 20.1°C | 22 mm | 46% | 2.6 m/s | 6.2 |
| 1997 | 32.5°C | 26.7°C | 20.9°C | 36.2°C | 15.3°C | 114 mm | 65% | 2.7 m/s | 5.9 |
| 1996 | 30.3°C | 25.5°C | 20.7°C | 34.9°C | 16.5°C | 172 mm | 74% | 2.5 m/s | 5.5 |
| 1995 | 34.0°C | 28.4°C | 22.8°C | 37.9°C | 18.5°C | 80 mm | 63% | 2.6 m/s | 6.3 |
| 1994 | 35.1°C | 28.0°C | 20.9°C | 39.4°C | 15.6°C | 74 mm | 53% | 3.1 m/s | 6.3 |
| 1993 | 34.2°C | 28.3°C | 22.4°C | 38.6°C | 15.1°C | 67 mm | 58% | 2.9 m/s | 6 |
| 1992 ❄️ | 28.9°C | 23.6°C | 18.2°C | 34.5°C | 12.9°C | 147 mm | 73% | 2.5 m/s | 5.5 |
| 1991 | 33.6°C | 27.6°C | 21.5°C | 38.2°C | 17.1°C | 71 mm | 55% | 2.4 m/s | 6.2 |
| 1990 | 33.7°C | 27.6°C | 21.5°C | 39.9°C | 15.5°C | 73 mm | 60% | 2.5 m/s | 6.4 |
| 1989 | 31.3°C | 26.1°C | 20.9°C | 35.9°C | 11.7°C | 115 mm | 67% | 3 m/s | 5.6 |
| 1988 | 35.6°C | 29.2°C | 22.9°C | 40.0°C | 12.7°C | 37 mm | 50% | 2.8 m/s | 6.1 |
| 1987 | 32.6°C | 27.0°C | 21.3°C | 36.1°C | 14.6°C | 65 mm | 65% | 2.6 m/s | 6.3 |
| 1986 | 32.0°C | 26.3°C | 20.6°C | 39.0°C | 12.7°C | 97 mm | 59% | 2.7 m/s | 5.8 |
| 1985 | 34.1°C | 27.7°C | 21.4°C | 38.7°C | 15.6°C | 61 mm | 60% | 2.7 m/s | 6.2 |
| 1984 | 35.4°C | 28.8°C | 22.1°C | 41.7°C | 18.4°C | 56 mm | 50% | 2.5 m/s | 5.9 |
| 1983 | 35.9°C | 30.0°C | 24.1°C | 40.1°C | 22.3°C | 74 mm | 55% | 2.6 m/s | — |
| 1982 | 34.9°C | 28.8°C | 22.6°C | 39.4°C | 19.9°C | 18 mm | 59% | 3 m/s | — |
| 1981 | 32.5°C | 26.6°C | 20.6°C | 36.7°C | 14.3°C | 107 mm | 60% | 2.8 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 34.1°C with lows near 22.2°C (mean 28.2°C), based on 45 years of NASA POWER data.
August averages 83 mm of rainfall in Oklahoma City, about average for rainfall. The wettest on record was 175 mm in 2017.
The hottest August reached 46.6°C in 2012. The coldest dipped to 11.7°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 0.6°C. Daytime highs moved from 34.6°C to 35.1°C and overnight lows from 22.2°C to 22.9°C over the same span.
August is one of the warmer months of the year in Oklahoma City and about average for rainfall, so plan for around 34.1°C daytime highs and 22.2°C at night.
Not quite — August is the 11th coolest month in Oklahoma City, averaging 28.2°C.
For August in Oklahoma City, pack light, breathable clothing and sun protection, with typical highs of 34.1°C and lows of 22.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in August averages 59% — moderately humid.
Average wind speed in August is 2.7 m/s. The windiest August on record averaged 3.5 m/s (2000).
The wettest August on record was 2017 with 175 mm. On average, August sees 83 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 Oklahoma City 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.
