Climate averages 1991–2020
Spokane weather
in August.
A hot, very dry month: the 2nd warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Spokane: daytime highs average 29.3°C and nights cool to about 15.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 12 mm of rain on roughly 2 days, which makes August a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 17 min on an average August day.
The nearest other city in this atlas is Spokane Valley (14 km away). In August its highs average 28.7°C, 0.6°C cooler than Spokane, with 14 mm of rain.
Among the 498 cities listed in the United States, Spokane ranks joint 273rd of 498 for the warmest August highs and joint 118th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Spokane is 0.6°C cooler than that mean.
From August to September, average highs fall by 5.6°C to 23.7°C, and monthly rainfall rises from 12 mm to 19 mm.
The annual picture
August in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Spokane climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.2°C-4.6°C | -4.6°C | 69 | 12.7 | 8.99 h |
| February | 5.0°C-3.6°C | -3.6°C | 49 | 10.0 | 10.210 h |
| March | 9.7°C-0.6°C | -0.6°C | 63 | 12.0 | 11.912 h |
| April | 14.3°C3.0°C | 3.0°C | 50 | 9.8 | 13.614 h |
| May | 19.9°C7.8°C | 7.8°C | 46 | 8.0 | 15.115 h |
| June | 23.8°C11.6°C | 11.6°C | 33 | 6.0 | 15.916 h |
| July | 29.7°C16.0°C | 16.0°C | 13 | 2.7 | 15.616 h |
| August, selected | 29.3°C15.7°C | 15.7°C | 12 | 2.3 | 14.314 h |
| September | 23.7°C11.0°C | 11.0°C | 19 | 4.2 | 12.613 h |
| October | 15.1°C4.9°C | 4.9°C | 46 | 7.9 | 10.911 h |
| November | 6.8°C-0.5°C | -0.5°C | 73 | 12.6 | 9.49 h |
| December | 1.9°C-4.1°C | -4.1°C | 78 | 12.3 | 8.59 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
August in nearby cities
- Spokane Valley in AugustUnited States · 14 kmHigh 28.7°C · Low 15.1°C · 14 mm rain
- Tri-Cities in AugustUnited States · 207 kmHigh 33.2°C · Low 18.6°C · 4.2 mm rain
- Kennewick in AugustUnited States · 207 kmHigh 33.0°C · Low 18.5°C · 4.2 mm rain
- Yakima in AugustUnited States · 261 kmHigh 30.2°C · Low 15.1°C · 3.0 mm rain
- Missoula in AugustUnited States · 274 kmHigh 28.6°C · Low 14.9°C · 19 mm rain
- Kelowna in AugustCanada · 290 kmHigh 27.8°C · Low 16.5°C · 25 mm rain
- Bellevue in AugustUnited States · 358 kmHigh 24.1°C · Low 13.9°C · 33 mm rain
- Kirkland in AugustUnited States · 358 kmHigh 23.4°C · Low 13.5°C · 38 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Spokane) is explained once on the Spokane year overview and on the Sources, method and limits page.