August is one of the warmer months of the year in Spokane, with average highs near 27.9°C and lows around 13.1°C (mean 20.5°C). It is one of the drier months, averaging 16 mm of rainfall and 50% relative humidity across the period.
August is one of the warmer months of the year in Spokane. Across 45 years of records, the warmest August in Spokane was 2022 — when the month averaged 23.4°C — while the coldest was 1995 at 17°C. Typical August days reach 27.9°C with nights near 13.1°C. The long-term trend is warming, about 0.5°C per decade.
August is one of the drier months in Spokane, averaging 16 mm of rainfall. The wettest August on record was 1989 with 58 mm, while the driest was 1988 at 2 mm.
Relative humidity in Spokane during August averages 50%. The most humid August was 1993 at 60%, and the least humid was 2015 at 40%.
August receives about 6 kWh/m²/day of solar energy in Spokane. The sunniest August was 2011 at 6.8 kWh/m²/day, and the cloudiest was 1989 at 5.2.
Average wind speed in Spokane during August is 1.8 m/s. The windiest Augusts were 2008, 2010 and 2015, among others at 2 m/s, while the calmest was 2013 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.8°C | 19.9°C | 20.4°C | 21.0°C | 21.8°C | +2°C |
| Avg High | 27.2°C | 27.2°C | 28.0°C | 28.5°C | 29.1°C | +1.9°C |
| Avg Low | 12.4°C | 12.6°C | 12.8°C | 13.6°C | 14.5°C | +2.1°C |
| Avg Rain | 18 mm | 20 mm | 15 mm | 12 mm | 16 mm | -2 mm |
August temperatures in Spokane have risen by about 2.1°C between 1981–1985 and 2021–2025.
August has ranged from a record low of 2.7°C (1992) to a record high of 38.8°C (2024).
Rainfall in August is one of the drier months, averaging 16 mm, with a wettest year of 58 mm.
One of the best times to visit Spokane
August is one of the best times to visit Spokane. Expect days averaging 27.9°C and nights around 13.1°C (mean 20.5°C) — warmer than Spokane's yearly average — with low rainfall (16 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 | 28.7°C | 21.7°C | 14.7°C | 35.2°C | 10.1°C | 23 mm | 54% | 1.8 m/s | 5.6 |
| 2024 | 28.7°C | 21.1°C | 13.5°C | 38.8°C | 7.3°C | 13 mm | 49% | 1.8 m/s | 5.6 |
| 2023 | 29.3°C | 22.2°C | 15.0°C | 38.1°C | 10.3°C | 32 mm | 51% | 1.8 m/s | 5.4 |
| 2022 🔥 | 31.1°C | 23.4°C | 15.8°C | 37.1°C | 11.0°C | 7 mm | 49% | 1.7 m/s | 6.2 |
| 2021 | 28.4°C | 21.4°C | 14.4°C | 37.1°C | 7.1°C | 15 mm | 45% | 1.9 m/s | 5.3 |
| 2020 | 28.5°C | 20.9°C | 13.3°C | 36.9°C | 8.0°C | 8 mm | 46% | 1.9 m/s | 6.3 |
| 2019 | 28.9°C | 21.5°C | 14.1°C | 35.8°C | 10.0°C | 18 mm | 49% | 1.7 m/s | 6 |
| 2018 | 27.7°C | 20.5°C | 13.3°C | 38.2°C | 8.0°C | 9 mm | 50% | 1.8 m/s | 5.8 |
| 2017 | 29.8°C | 22.1°C | 14.4°C | 35.6°C | 9.1°C | 2 mm | 48% | 1.6 m/s | 5.9 |
| 2016 | 28.3°C | 20.8°C | 13.3°C | 32.9°C | 9.9°C | 11 mm | 47% | 1.7 m/s | 6.3 |
| 2015 | 29.3°C | 21.9°C | 14.5°C | 37.4°C | 9.3°C | 6 mm | 40% | 2 m/s | 5.6 |
| 2014 | 28.4°C | 21.5°C | 14.5°C | 35.9°C | 10.2°C | 28 mm | 54% | 1.6 m/s | 5.7 |
| 2013 | 28.7°C | 21.6°C | 14.4°C | 34.4°C | 11.4°C | 34 mm | 54% | 1.5 m/s | 5.8 |
| 2012 | 28.9°C | 20.8°C | 12.7°C | 34.2°C | 7.6°C | 4 mm | 51% | 1.7 m/s | 6.6 |
| 2011 | 28.0°C | 20.4°C | 12.8°C | 33.8°C | 8.9°C | 3 mm | 51% | 1.8 m/s | 6.8 |
| 2010 | 26.6°C | 19.3°C | 12.1°C | 33.2°C | 6.4°C | 10 mm | 51% | 2 m/s | 6.1 |
| 2009 | 28.0°C | 20.6°C | 13.2°C | 37.1°C | 7.9°C | 20 mm | 51% | 1.8 m/s | 5.9 |
| 2008 | 27.1°C | 19.6°C | 12.1°C | 38.0°C | 5.9°C | 27 mm | 51% | 2 m/s | 5.9 |
| 2007 | 26.9°C | 19.3°C | 11.8°C | 34.5°C | 8.3°C | 15 mm | 48% | 1.9 m/s | 6.3 |
| 2006 | 27.7°C | 19.9°C | 12.1°C | 35.4°C | 7.2°C | 3 mm | 46% | 1.8 m/s | 6.5 |
| 2005 | 28.7°C | 20.7°C | 12.6°C | 35.6°C | 7.7°C | 6 mm | 40% | 1.8 m/s | 6.6 |
| 2004 | 28.3°C | 21.2°C | 14.2°C | 37.5°C | 9.9°C | 50 mm | 54% | 1.9 m/s | 5.4 |
| 2003 | 29.4°C | 21.8°C | 14.1°C | 34.6°C | 11.7°C | 12 mm | 44% | 1.8 m/s | 6.3 |
| 2002 | 26.8°C | 19.3°C | 11.8°C | 33.2°C | 7.5°C | 9 mm | 47% | 1.8 m/s | 6.4 |
| 2001 | 29.9°C | 22.0°C | 14.1°C | 37.7°C | 8.4°C | 6 mm | 42% | 1.8 m/s | 6.4 |
| 2000 | 27.1°C | 19.4°C | 11.7°C | 33.4°C | 6.5°C | 4 mm | 48% | 2 m/s | 6.7 |
| 1999 | 27.8°C | 20.6°C | 13.4°C | 34.6°C | 5.5°C | 38 mm | 57% | 1.8 m/s | 5.8 |
| 1998 | 29.0°C | 21.2°C | 13.5°C | 36.8°C | 8.1°C | 9 mm | 51% | 1.7 m/s | 6.5 |
| 1997 | 27.9°C | 20.7°C | 13.6°C | 34.5°C | 9.5°C | 14 mm | 57% | 1.8 m/s | 6.2 |
| 1996 | 26.9°C | 19.4°C | 11.9°C | 34.6°C | 7.7°C | 16 mm | 53% | 1.9 m/s | 6.1 |
| 1995 ❄️ | 24.0°C | 17.0°C | 10.1°C | 30.8°C | 5.1°C | 26 mm | 56% | 2 m/s | 5.6 |
| 1994 | 28.8°C | 21.1°C | 13.3°C | 36.2°C | 9.1°C | 4 mm | 43% | 1.8 m/s | 6.4 |
| 1993 | 24.8°C | 17.7°C | 10.6°C | 30.6°C | 4.8°C | 22 mm | 60% | 1.8 m/s | 5.8 |
| 1992 | 27.6°C | 20.0°C | 12.4°C | 35.7°C | 2.7°C | 21 mm | 45% | 1.8 m/s | 6.1 |
| 1991 | 27.7°C | 20.8°C | 13.9°C | 32.9°C | 7.4°C | 16 mm | 55% | 1.7 m/s | 6.2 |
| 1990 | 27.4°C | 20.4°C | 13.5°C | 36.3°C | 6.9°C | 35 mm | 56% | 1.7 m/s | 5.6 |
| 1989 🌧️ | 24.7°C | 18.0°C | 11.2°C | 34.9°C | 8.0°C | 58 mm | 58% | 1.7 m/s | 5.2 |
| 1988 | 27.5°C | 19.6°C | 11.8°C | 36.7°C | 8.4°C | 2 mm | 44% | 1.9 m/s | 6.3 |
| 1987 | 26.3°C | 18.9°C | 11.4°C | 33.5°C | 7.3°C | 25 mm | 50% | 1.6 m/s | 6.1 |
| 1986 | 30.4°C | 22.4°C | 14.4°C | 35.4°C | 11.7°C | 8 mm | 43% | 1.6 m/s | 6.3 |
| 1985 | 25.3°C | 18.1°C | 10.8°C | 31.3°C | 6.5°C | 17 mm | 48% | 2 m/s | 5.7 |
| 1984 | 27.2°C | 19.7°C | 12.2°C | 34.6°C | 5.6°C | 7 mm | 53% | 1.8 m/s | 6 |
| 1983 | 27.4°C | 20.6°C | 13.9°C | 35.5°C | 9.3°C | 30 mm | 59% | 1.7 m/s | — |
| 1982 | 26.8°C | 19.7°C | 12.5°C | 34.4°C | 8.5°C | 9 mm | 54% | 1.9 m/s | — |
| 1981 | 29.5°C | 21.6°C | 13.7°C | 35.4°C | 8.7°C | 4 mm | 47% | 1.7 m/s | — |
Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.
The average high in August is around 27.9°C with lows near 13.1°C (mean 20.5°C), based on 45 years of NASA POWER data.
August averages 16 mm of rainfall in Spokane, one of the drier months. The wettest on record was 58 mm in 1989.
The hottest August reached 38.8°C in 2024. The coldest dipped to 2.7°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2.1°C. Daytime highs moved from 27.2°C to 29.2°C and overnight lows from 12.6°C to 14.7°C over the same span.
August is one of the warmer months of the year in Spokane and one of the drier months, so plan for around 27.9°C daytime highs and 13.1°C at night.
Not quite — August is the 11th coolest month in Spokane, averaging 20.5°C.
For August in Spokane, pack light layers you can adjust through the day, with typical highs of 27.9°C and lows of 13.1°C.
Relative humidity in August averages 50% — relatively dry.
Average wind speed in August is 1.8 m/s. The windiest August on record averaged 2 m/s (1985).
The wettest August on record was 1989 with 58 mm. On average, August sees 16 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 Spokane 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.
