August is one of the warmer months of the year in Olympia, with average highs near 23.3°C and lows around 11.7°C (mean 17.5°C). It is one of the drier months, averaging 34 mm of rainfall and 81% relative humidity across the period.
August is one of the warmer months of the year in Olympia. Across 45 years of records, the warmest August in Olympia was 2023 — when the month averaged 19.5°C — while the coldest was 1995 at 15.6°C. Typical August days reach 23.3°C with nights near 11.7°C. The long-term trend is warming, about 0.2°C per decade.
August is one of the drier months in Olympia, averaging 34 mm of rainfall. The wettest August on record was 2004 with 111 mm, while the driest was 1986 at 4 mm.
Relative humidity in Olympia during August averages 81%. The most humid Augusts were 1999 and 2025 at 85%, and the least humid was 1992 at 76%.
August receives about 5.4 kWh/m²/day of solar energy in Olympia. The sunniest August was 1998 at 6.1 kWh/m²/day, and the cloudiest was 1995 at 4.6.
Average wind speed in Olympia during August is 0.2 m/s. The windiest Augusts were 1981, 1982 and 1985 at 0.3 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.3°C | 17.4°C | 17.1°C | 17.8°C | 18.1°C | +0.8°C |
| Avg High | 23.4°C | 23.0°C | 22.8°C | 23.6°C | 23.8°C | +0.4°C |
| Avg Low | 11.2°C | 11.8°C | 11.4°C | 12.0°C | 12.3°C | +1.1°C |
| Avg Rain | 25 mm | 42 mm | 39 mm | 28 mm | 33 mm | +8 mm |
August temperatures in Olympia have risen by about 1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 7.1°C (2000) to a record high of 36.5°C (1987).
Rainfall in August is one of the drier months, averaging 34 mm, with a wettest year of 111 mm.
One of the best times to visit Olympia
August is one of the best times to visit Olympia. Expect days averaging 23.3°C and nights around 11.7°C (mean 17.5°C) — warmer than Olympia's yearly average — with moderate rainfall (34 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 | 22.3°C | 17.1°C | 11.8°C | 30.0°C | 8.6°C | 84 mm | 85% | 0.2 m/s | 5.2 |
| 2024 | 22.9°C | 17.3°C | 11.7°C | 30.5°C | 8.9°C | 52 mm | 84% | 0.2 m/s | 4.8 |
| 2023 🔥 | 25.6°C | 19.5°C | 13.4°C | 34.8°C | 10.1°C | 26 mm | 78% | 0.2 m/s | 5.5 |
| 2022 | 25.3°C | 19.3°C | 13.2°C | 31.4°C | 9.7°C | 7 mm | 81% | 0.2 m/s | 5.9 |
| 2021 | 23.8°C | 17.8°C | 11.9°C | 34.8°C | 7.4°C | 10 mm | 80% | 0.2 m/s | 5.3 |
| 2020 | 22.9°C | 17.3°C | 11.7°C | 29.4°C | 8.7°C | 21 mm | 81% | 0.2 m/s | 5.9 |
| 2019 | 24.2°C | 18.3°C | 12.5°C | 31.4°C | 10.0°C | 29 mm | 81% | 0.2 m/s | 5.2 |
| 2018 | 24.3°C | 18.1°C | 12.0°C | 32.4°C | 9.2°C | 16 mm | 78% | 0.2 m/s | 5.2 |
| 2017 | 25.2°C | 18.7°C | 12.3°C | 33.1°C | 8.9°C | 7 mm | 79% | 0.2 m/s | 5.9 |
| 2016 | 24.2°C | 18.1°C | 12.0°C | 32.4°C | 9.5°C | 21 mm | 79% | 0.2 m/s | 5.7 |
| 2015 | 24.0°C | 18.3°C | 12.6°C | 31.0°C | 9.4°C | 78 mm | 77% | 0.2 m/s | 5.4 |
| 2014 | 24.2°C | 18.4°C | 12.6°C | 30.7°C | 9.9°C | 36 mm | 82% | 0.2 m/s | 5.5 |
| 2013 | 23.0°C | 17.7°C | 12.4°C | 27.0°C | 10.3°C | 46 mm | 84% | 0.2 m/s | 5 |
| 2012 | 23.0°C | 17.3°C | 11.7°C | 32.1°C | 7.4°C | 5 mm | 82% | 0.2 m/s | 5.6 |
| 2011 | 22.1°C | 16.6°C | 11.1°C | 28.2°C | 8.1°C | 15 mm | 82% | 0.2 m/s | 5.5 |
| 2010 | 22.1°C | 16.4°C | 10.8°C | 31.6°C | 7.5°C | 29 mm | 82% | 0.2 m/s | 5.3 |
| 2009 | 22.3°C | 16.8°C | 11.3°C | 30.0°C | 8.9°C | 32 mm | 82% | 0.2 m/s | 4.9 |
| 2008 | 21.7°C | 16.6°C | 11.5°C | 31.1°C | 7.5°C | 80 mm | 84% | 0.2 m/s | 4.8 |
| 2007 | 21.7°C | 16.4°C | 11.1°C | 28.3°C | 8.6°C | 26 mm | 82% | 0.2 m/s | 5 |
| 2006 | 22.9°C | 16.8°C | 10.6°C | 29.3°C | 7.9°C | 5 mm | 78% | 0.2 m/s | 5.8 |
| 2005 | 24.0°C | 17.9°C | 11.8°C | 30.5°C | 9.2°C | 11 mm | 79% | 0.2 m/s | 5.8 |
| 2004 🌧️ | 24.2°C | 18.7°C | 13.1°C | 34.2°C | 9.7°C | 111 mm | 83% | 0.2 m/s | 5.1 |
| 2003 | 23.4°C | 17.5°C | 11.6°C | 30.6°C | 8.0°C | 12 mm | 79% | 0.2 m/s | 5.8 |
| 2002 | 23.5°C | 17.1°C | 10.8°C | 34.8°C | 8.0°C | 9 mm | 79% | 0.2 m/s | 5.8 |
| 2001 | 22.6°C | 17.0°C | 11.4°C | 30.3°C | 9.1°C | 80 mm | 83% | 0.2 m/s | 5 |
| 2000 | 21.4°C | 16.0°C | 10.7°C | 26.8°C | 7.1°C | 22 mm | 82% | 0.2 m/s | 5.5 |
| 1999 | 22.3°C | 17.1°C | 11.9°C | 27.6°C | 9.1°C | 40 mm | 85% | 0.2 m/s | 5.1 |
| 1998 | 23.8°C | 17.6°C | 11.5°C | 30.1°C | 8.6°C | 6 mm | 81% | 0.2 m/s | 6.1 |
| 1997 | 23.4°C | 18.2°C | 12.9°C | 29.7°C | 10.3°C | 66 mm | 83% | 0.2 m/s | 5.6 |
| 1996 | 23.0°C | 17.1°C | 11.3°C | 30.1°C | 8.0°C | 26 mm | 81% | 0.2 m/s | 5.3 |
| 1995 ❄️ | 20.8°C | 15.6°C | 10.4°C | 27.0°C | 7.9°C | 65 mm | 83% | 0.2 m/s | 4.6 |
| 1994 | 22.9°C | 17.2°C | 11.6°C | 30.3°C | 9.9°C | 21 mm | 81% | 0.2 m/s | 5.1 |
| 1993 | 22.6°C | 17.0°C | 11.4°C | 30.9°C | 7.5°C | 20 mm | 82% | 0.2 m/s | 4.9 |
| 1992 | 24.4°C | 18.1°C | 11.8°C | 29.9°C | 8.2°C | 25 mm | 76% | 0.2 m/s | 5.5 |
| 1991 | 22.9°C | 17.6°C | 12.3°C | 28.6°C | 8.0°C | 100 mm | 84% | 0.2 m/s | 4.9 |
| 1990 | 23.8°C | 18.1°C | 12.4°C | 33.0°C | 8.9°C | 54 mm | 82% | 0.2 m/s | 5.1 |
| 1989 | 21.9°C | 16.4°C | 11.0°C | 26.8°C | 8.7°C | 32 mm | 82% | 0.2 m/s | 5 |
| 1988 | 22.5°C | 16.6°C | 10.7°C | 29.9°C | 8.0°C | 18 mm | 80% | 0.2 m/s | 5.2 |
| 1987 | 24.3°C | 17.6°C | 10.9°C | 36.5°C | 7.5°C | 11 mm | 76% | 0.2 m/s | 5.6 |
| 1986 | 25.5°C | 18.9°C | 12.2°C | 31.2°C | 8.4°C | 4 mm | 77% | 0.2 m/s | 5.6 |
| 1985 | 23.1°C | 16.8°C | 10.5°C | 31.3°C | 7.7°C | 28 mm | 76% | 0.3 m/s | 5.4 |
| 1984 | 21.8°C | 16.2°C | 10.5°C | 27.5°C | 7.3°C | 17 mm | 80% | 0.2 m/s | 5.3 |
| 1983 | 22.9°C | 17.1°C | 11.2°C | 31.1°C | 9.3°C | 61 mm | 82% | 0.2 m/s | — |
| 1982 | 23.5°C | 17.5°C | 11.4°C | 32.8°C | 8.2°C | 26 mm | 77% | 0.3 m/s | — |
| 1981 | 25.0°C | 18.6°C | 12.2°C | 35.4°C | 8.4°C | 28 mm | 79% | 0.3 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 23.3°C with lows near 11.7°C (mean 17.5°C), based on 45 years of NASA POWER data.
August averages 34 mm of rainfall in Olympia, one of the drier months. The wettest on record was 111 mm in 2004.
The hottest August reached 36.5°C in 1987. The coldest dipped to 7.1°C in 2000.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 1°C. Daytime highs moved from 23.3°C to 24°C and overnight lows from 11.2°C to 12.4°C over the same span.
August is one of the warmer months of the year in Olympia and one of the drier months, so plan for around 23.3°C daytime highs and 11.7°C at night.
Not quite — August is the 12th coolest month in Olympia, averaging 17.5°C.
For August in Olympia, pack light layers you can adjust through the day, with typical highs of 23.3°C and lows of 11.7°C.
Relative humidity in August averages 81% — quite humid.
Average wind speed in August is 0.2 m/s. The windiest August on record averaged 0.3 m/s (1981).
The wettest August on record was 2004 with 111 mm. On average, August sees 34 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 Olympia 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.
