West Allis Climate by Month
West Allis, Wisconsin, United States
Warm summers and freezing winters, with rain spread through the year.
West Allis has warm summers and freezing winters, with rain spread through the year. Expect highs of 82°F (28°C) in July and 29°F (-1°C) in January, with the coldest nights (January) near 14°F (-10°C). It gets 34 in (862 mm) of rain a year, spread across the months.
- Warmest month
- 82°F(28°C)
- Average high, July
- Coldest nights
- 14°F(-10°C)
- Average low, January
- Rain per year
- 34 in(862 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: July
Best and worst months in West Allis
Best for weatherJune and September are the best time for weather in West Allis: highs near 75°F (24°C) and about 3.8 in (96 mm) of rain a month.
Least pleasantJanuary and February are the least pleasant; January is the coldest, with highs of only 29°F (-1°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
West Allis weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 29°F(-1°C) | 14°F(-10°C) | 1.5 in(39 mm) | 75% | 1.4 |
| FebFebruary | 34°F(1°C) | 18°F(-8°C) | 1.5 in(39 mm) | 85% | 2.3 |
| MarMarch | 44°F(7°C) | 27°F(-3°C) | 2.0 in(51 mm) | 71% | 3.5 |
| AprApril | 56°F(13°C) | 37°F(3°C) | 3.7 in(95 mm) | 65% | 4.5 |
| MayMay | 68°F(20°C) | 47°F(8°C) | 3.5 in(89 mm) | 68% | 5.2 |
| JunJuneBest | 77°F(25°C) | 56°F(14°C) | 4.1 in(104 mm) | 71% | 5.8 |
| JulJuly | 82°F(28°C) | 62°F(17°C) | 3.5 in(88 mm) | 71% | 6.0 |
| AugAugust | 80°F(27°C) | 61°F(16°C) | 3.9 in(98 mm) | 75% | 5.1 |
| SepSeptemberBest | 73°F(23°C) | 53°F(12°C) | 3.5 in(88 mm) | 70% | 4.2 |
| OctOctober | 61°F(16°C) | 42°F(5°C) | 2.8 in(71 mm) | 70% | 2.6 |
| NovNovember | 46°F(8°C) | 30°F(-1°C) | 2.0 in(52 mm) | 76% | 1.6 |
| DecDecember | 34°F(1°C) | 20°F(-7°C) | 1.9 in(48 mm) | 80% | 1.2 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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