Climate averages 1991–2020
Spokane Valley weather
in December.
A cold month with moderate precipitation: the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Spokane Valley: daytime highs average 1.7°C and nights cool to about -4.3°C. By daytime temperature it is the coolest month of the year.
Expect about 85 mm of precipitation on roughly 13 days, which makes December a month with moderate precipitation (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 8 h 30 min on an average December day.
The nearest other city in this atlas is Spokane (14 km away). In December its highs average 1.9°C, about as warm as Spokane Valley, with 78 mm of precipitation.
Among the 498 cities listed in the United States, Spokane Valley ranks joint 467th of 498 for the warmest December highs and joint 298th of 498 for the driest December (precipitation, lowest first). The mean December high of those 498 cities is 10.5°C; Spokane Valley is 8.9°C cooler than that mean.
From December to January, average highs rise by 0.2°C to 1.9°C, and monthly precipitation falls from 85 mm to 78 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Spokane in DecemberUnited States · 14 kmHigh 1.9°C · Low -4.1°C · 78 mm precipitation
- Kennewick in DecemberUnited States · 217 kmHigh 5.4°C · Low -1.4°C · 35 mm rain
- Tri-Cities in DecemberUnited States · 217 kmHigh 5.6°C · Low -1.2°C · 35 mm rain
- Missoula in DecemberUnited States · 261 kmHigh -0.1°C · Low -7.4°C · 51 mm precipitation
- Yakima in DecemberUnited States · 274 kmHigh 2.5°C · Low -4.0°C · 66 mm rain
- Kelowna in DecemberCanada · 296 kmHigh 1.3°C · Low -3.1°C · 66 mm precipitation
- Bellevue in DecemberUnited States · 372 kmHigh 6.8°C · Low 1.7°C · 178 mm rain
- Everett in DecemberUnited States · 372 kmHigh 6.4°C · Low 1.8°C · 231 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.