Mill Creek, WA Weather & Climate Normals
What a normal year in Mill Creek actually looks like
On the 30-year record NOAA keeps for Mill Creek, WA, the comfort score comes out to 57/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Mill Creek's weather actually swings
Average temperatures in Mill Creek run from 40°F in Dec up to 64°F in Aug, a 23.9°F seasonal swing, a middling gap by national standards.
Mill Creek, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 46°F | 37°F | 3.89in |
| Feb | 48°F | 37°F | 2.84in |
| Mar | 52°F | 39°F | 3.63in |
| Apr | 56°F | 43°F | 2.67in |
| May | 63°F | 48°F | 2.11in |
| Jun | 66°F | 51°F | 1.89in |
| Jul | 72°F | 55°F | 0.84in |
| Aug | 73°F | 55°F | 0.98in |
| Sep | 68°F | 52°F | 1.68in |
| Oct | 58°F | 46°F | 3.35in |
| Nov | 50°F | 40°F | 4.97in |
| Dec | 45°F | 36°F | 4.52in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are Mill Creek's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet Mill Creek actually gets
Mill Creek averages 33.37in of precipitation a year across roughly 178 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Mill Creek against the rest of the country
Out of 4876 cities scored here, Mill Creek comes in at 677; within WA alone it ranks 17 of 125. Population is about 20,993.
Checking the actual forecast
These figures come from Everett Snohomish Ap, WA US, the NOAA station 4.4 miles from Mill Creek, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is