West Allis weather in August: West Allis, Wisconsin: normal highs, lows, rain and records for August
West Allis in August has a normal high of 83°F and a normal low of 62°F, a daily mean of 72°F, falling from 84°F on the 1st to 82°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 4.34 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 17°C, 110 mm of precipitation in August.
- NOAA stationWest Allis
- Station IDUSC00479046
- Location43.02°N 88.00°W
- Elevation723 ft (220 m)
- From the center2 miles
- Population59,784
- Jan 31° 15°
- Feb 34° 17°
- Mar 45° 27°
- Apr 57° 37°
- May 70° 48°
- Jun 80° 58°
- Jul 85° 63°
- Aug 83° 62°
- Sep 77° 54°
- Oct 62° 42°
- Nov 48° 30°
- Dec 36° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Allis in August?
The normal high is 83°F and the normal low 62°F, for a daily mean of 72.4°F. August is 1.5°F cooler than July and 7.0°F warmer than September. August is the 2nd warmest month of the year in West Allis and the 2nd wettest. Across the month the normal high falls 2°F, from 84°F on August 1 to 82°F on August 31. From one year to the next August's mean temperature typically moves about 2.6°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°F and 75°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 84°F | 63°F | 32% | 18% |
| August 8 | 84°F | 63°F | 32% | 19% |
| August 15 | 83°F | 62°F | 32% | 19% |
| August 22 | 83°F | 62°F | 31% | 20% |
| August 31 | 82°F | 60°F | 30% | 20% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 84°F | 63°F | 32% | 18% | 14 h 30 min |
| August 2 | 84°F | 63°F | 32% | 18% | 14 h 30 min |
| August 3 | 84°F | 63°F | 32% | 18% | 14 h 30 min |
| August 4 | 84°F | 63°F | 32% | 18% | 14 h 30 min |
| August 5 | 84°F | 63°F | 32% | 18% | 14 h 20 min |
| August 6 | 84°F | 63°F | 32% | 18% | 14 h 20 min |
| August 7 | 84°F | 63°F | 32% | 19% | 14 h 20 min |
| August 8 | 84°F | 63°F | 32% | 19% | 14 h 20 min |
| August 9 | 83°F | 63°F | 32% | 19% | 14 h 10 min |
| August 10 | 83°F | 62°F | 32% | 19% | 14 h 10 min |
| August 11 | 83°F | 62°F | 32% | 19% | 14 h 10 min |
| August 12 | 83°F | 62°F | 32% | 19% | 14 h 10 min |
| August 13 | 83°F | 62°F | 32% | 19% | 14 h |
| August 14 | 83°F | 62°F | 32% | 19% | 14 h |
| August 15 | 83°F | 62°F | 32% | 19% | 14 h |
| August 16 | 83°F | 62°F | 32% | 19% | 14 h |
| August 17 | 83°F | 62°F | 32% | 19% | 13 h 50 min |
| August 18 | 83°F | 62°F | 32% | 20% | 13 h 50 min |
| August 19 | 83°F | 62°F | 32% | 20% | 13 h 50 min |
| August 20 | 83°F | 62°F | 32% | 20% | 13 h 50 min |
| August 21 | 83°F | 62°F | 32% | 20% | 13 h 40 min |
| August 22 | 83°F | 62°F | 31% | 20% | 13 h 40 min |
| August 23 | 83°F | 62°F | 31% | 20% | 13 h 40 min |
| August 24 | 83°F | 61°F | 31% | 20% | 13 h 40 min |
| August 25 | 83°F | 61°F | 31% | 20% | 13 h 30 min |
| August 26 | 82°F | 61°F | 31% | 20% | 13 h 30 min |
| August 27 | 82°F | 61°F | 31% | 20% | 13 h 30 min |
| August 28 | 82°F | 61°F | 30% | 20% | 13 h 30 min |
| August 29 | 82°F | 61°F | 30% | 20% | 13 h 20 min |
| August 30 | 82°F | 60°F | 30% | 20% | 13 h 20 min |
| August 31 | 82°F | 60°F | 30% | 20% | 13 h 20 min |
- Normal high
- 83°FAugust average
- Normal low
- 62°FAugust average
- Precipitation
- 4.34 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 22
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00479046; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Allis in August?
On a given August day the chance of 0.01 inch or more is 31% on average, highest around August 10 (32%). In all, 4.34 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in West Allis, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00479046.
What are the records for August in West Allis?
The warmest August temperature on this station's record (since 1948) is 101°F, on August 24, 1948; the coldest is 44°F, on August 28, 1965. The wettest August brought 10.51 in (2025).
The August mean against the 1991-2020 normal of 72.4°F: 2023 72.8°F (+0.4), 2024 72.3°F (−0.1), 2025 71.1°F (−1.3), 2026 72.1°F (−0.3). 1 of 4 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 72.8°F | +0.4°F | 4.24 in |
| 2024 | 72.3°F | −0.1°F | 5.36 in |
| 2025 | 71.1°F | −1.3°F | 10.51 in |
| 2026 | 72.1°F | −0.3°F | 6.21 in |
Source: records: ACIS, station USC00479046; recent months: ACIS, station USC00479046. Records and recent months use complete months only.
How does August in West Allis compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, August normal highs run from 71°F in Laona to 83°F in Lake Geneva; West Allis's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.