West Allis, WI Weather & Climate Normals
What a normal year in West Allis actually looks like
On the 30-year record NOAA keeps for West Allis, WI, the comfort score comes out to 43/100, 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 West Allis's weather actually swings
Average temperatures in West Allis run from 22°F in Jan up to 73°F in Jul, a 51.2°F seasonal swing, one of the widest gaps in this dataset.
West Allis, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 30°F | 14°F | 1.48in | 11in |
| Feb | 34°F | 17°F | 1.49in | 9.9in |
| Mar | 44°F | 26°F | 1.79in | 5.3in |
| Apr | 56°F | 36°F | 3.71in | 1.5in |
| May | 68°F | 48°F | 3.73in | 0in |
| Jun | 78°F | 58°F | 4.84in | 0in |
| Jul | 83°F | 63°F | 3.57in | 0in |
| Aug | 81°F | 62°F | 3.68in | 0in |
| Sep | 74°F | 53°F | 3.02in | 0in |
| Oct | 61°F | 42°F | 2.73in | 0in |
| Nov | 47°F | 30°F | 2.05in | 2in |
| Dec | 35°F | 21°F | 1.73in | 9.8in |
If you're timing a visit, May, Jun, Jul, Aug, and Sep are West Allis's mildest stretch; if you're moving there, you should plan around Jan's cold instead.
How wet West Allis actually gets
Over a typical year, West Allis sees about 33.82in of precipitation a year across roughly 120 days with measurable rain or snow, with 39.5in of snow a year.
West Allis against the rest of the country
Out of 4876 cities scored here, West Allis comes in at 3962; within WI alone it ranks 72 of 157. Population is about 59,784.
Checking the actual forecast
These figures come from Mt Mary College, WI US, the NOAA station 4.5 miles from West Allis, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated