Climate averages 1991–2020
Spokane Valley weather
in May.
A mild, moderately wet month: the 5th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Spokane Valley: daytime highs average 19.2°C and nights cool to about 7.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 51 mm of rain on roughly 9 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 06 min on an average May day.
The nearest other city in this atlas is Spokane (14 km away). In May its highs average 19.9°C, 0.7°C warmer than Spokane Valley, with 46 mm of rain.
Among the 498 cities listed in the United States, Spokane Valley ranks joint 436th of 498 for the warmest May highs and 143rd of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Spokane Valley is 4.6°C cooler than that mean.
From May to June, average highs rise by 3.8°C to 23.0°C, and monthly rainfall falls from 51 mm to 37 mm.
The annual picture
May 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 Valley climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.9°C-4.9°C | -4.9°C | 78 | 13.3 | 8.99 h |
| February | 4.6°C-4.0°C | -4.0°C | 54 | 10.7 | 10.210 h |
| March | 9.1°C-1.2°C | -1.2°C | 70 | 12.8 | 11.912 h |
| April | 13.7°C2.2°C | 2.2°C | 58 | 11.0 | 13.614 h |
| May, selected | 19.2°C7.0°C | 7.0°C | 51 | 8.6 | 15.115 h |
| June | 23.0°C10.9°C | 10.9°C | 37 | 6.6 | 15.916 h |
| July | 29.0°C15.3°C | 15.3°C | 15 | 3.0 | 15.616 h |
| August | 28.7°C15.1°C | 15.1°C | 14 | 2.6 | 14.314 h |
| September | 23.2°C10.5°C | 10.5°C | 22 | 4.4 | 12.613 h |
| October | 14.7°C4.5°C | 4.5°C | 52 | 8.5 | 10.911 h |
| November | 6.5°C-0.7°C | -0.7°C | 83 | 13.2 | 9.49 h |
| December | 1.7°C-4.3°C | -4.3°C | 85 | 12.8 | 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
May in nearby cities
- Spokane in MayUnited States · 14 kmHigh 19.9°C · Low 7.8°C · 46 mm rain
- Kennewick in MayUnited States · 217 kmHigh 24.8°C · Low 11.4°C · 18 mm rain
- Tri-Cities in MayUnited States · 217 kmHigh 25.0°C · Low 11.5°C · 18 mm rain
- Missoula in MayUnited States · 261 kmHigh 17.9°C · Low 6.3°C · 56 mm rain
- Yakima in MayUnited States · 274 kmHigh 21.4°C · Low 7.8°C · 18 mm rain
- Kelowna in MayCanada · 296 kmHigh 19.9°C · Low 8.5°C · 51 mm rain
- Bellevue in MayUnited States · 372 kmHigh 17.3°C · Low 8.1°C · 76 mm rain
- Everett in MayUnited States · 372 kmHigh 16.7°C · Low 8.1°C · 89 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 Valley) is explained once on the Spokane Valley year overview and on the Sources, method and limits page.