Milwaukee weather in August: Milwaukee, Wisconsin: normal highs, lows, rain and records for August
Milwaukee in August has a normal high of 80°F and a normal low of 64°F, a daily mean of 72°F, falling from 82°F on the 1st to 78°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.65 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 27°C and low of 18°C, 93 mm of precipitation in August.
- NOAA stationMilwaukee Mitchell Airport
- Station IDUSW00014839
- Location42.95°N 87.90°W
- Elevation670 ft (204 m)
- From the center8 miles
- Population563,531
- Jan 31° 17°
- Feb 34° 20°
- Mar 44° 29°
- Apr 55° 38°
- May 67° 48°
- Jun 77° 58°
- Jul 82° 65°
- Aug 80° 64°
- Sep 74° 56°
- Oct 61° 45°
- Nov 48° 33°
- Dec 36° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Milwaukee in August?
The normal high is 80°F and the normal low 64°F, for a daily mean of 72.3°F. August is 1.0°F cooler than July and 7.3°F warmer than September. August is the 2nd warmest month of the year in Milwaukee and the 3rd wettest. Across the month the normal high falls 4°F, from 82°F on August 1 to 78°F on August 31. From one year to the next August's mean temperature typically moves about 2.4°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 82°F | 65°F | 30% | 19% |
| August 8 | 81°F | 65°F | 30% | 19% |
| August 15 | 81°F | 65°F | 30% | 19% |
| August 22 | 80°F | 64°F | 29% | 19% |
| August 31 | 78°F | 62°F | 28% | 18% |
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 | 82°F | 65°F | 30% | 19% | 14 h 30 min |
| August 2 | 82°F | 65°F | 30% | 20% | 14 h 30 min |
| August 3 | 82°F | 65°F | 30% | 20% | 14 h 30 min |
| August 4 | 82°F | 65°F | 30% | 20% | 14 h 30 min |
| August 5 | 81°F | 65°F | 30% | 20% | 14 h 20 min |
| August 6 | 81°F | 65°F | 30% | 20% | 14 h 20 min |
| August 7 | 81°F | 65°F | 30% | 20% | 14 h 20 min |
| August 8 | 81°F | 65°F | 30% | 19% | 14 h 20 min |
| August 9 | 81°F | 65°F | 30% | 19% | 14 h 10 min |
| August 10 | 81°F | 65°F | 30% | 19% | 14 h 10 min |
| August 11 | 81°F | 65°F | 30% | 19% | 14 h 10 min |
| August 12 | 81°F | 65°F | 30% | 19% | 14 h 10 min |
| August 13 | 81°F | 65°F | 30% | 19% | 14 h |
| August 14 | 81°F | 65°F | 30% | 19% | 14 h |
| August 15 | 81°F | 65°F | 30% | 19% | 14 h |
| August 16 | 81°F | 65°F | 30% | 19% | 14 h |
| August 17 | 80°F | 64°F | 30% | 19% | 13 h 50 min |
| August 18 | 80°F | 64°F | 29% | 19% | 13 h 50 min |
| August 19 | 80°F | 64°F | 29% | 19% | 13 h 50 min |
| August 20 | 80°F | 64°F | 29% | 19% | 13 h 50 min |
| August 21 | 80°F | 64°F | 29% | 19% | 13 h 40 min |
| August 22 | 80°F | 64°F | 29% | 19% | 13 h 40 min |
| August 23 | 80°F | 64°F | 29% | 19% | 13 h 40 min |
| August 24 | 80°F | 63°F | 29% | 19% | 13 h 40 min |
| August 25 | 79°F | 63°F | 29% | 19% | 13 h 30 min |
| August 26 | 79°F | 63°F | 29% | 19% | 13 h 30 min |
| August 27 | 79°F | 63°F | 29% | 19% | 13 h 30 min |
| August 28 | 79°F | 63°F | 29% | 19% | 13 h 20 min |
| August 29 | 79°F | 62°F | 29% | 19% | 13 h 20 min |
| August 30 | 78°F | 62°F | 29% | 18% | 13 h 20 min |
| August 31 | 78°F | 62°F | 28% | 18% | 13 h 20 min |
- Normal high
- 80°FAugust average
- Normal low
- 64°FAugust average
- Precipitation
- 3.65 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 3
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 29
- Days at 80°F or more
- 15
- Sunshine
- 78%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014839; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Milwaukee in August?
On a given August day the chance of 0.01 inch or more is 30% on average, highest around August 1 (30%). In all, 3.65 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Milwaukee, 3 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014839.
How humid and windy is Milwaukee in August?
At 3 p.m. the normal temperature is 76°F with 59% relative humidity and a dew point of 60°F; at 6 a.m. it is 65°F with 83% humidity. The wind averages 8.5 mph, most often from the southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 65°F | 59°F | 83% | 6.7 mph | 37% |
| 9 a.m. | 72°F | 60°F | 67% | 9.9 mph | 44% |
| noon | 75°F | 60°F | 60% | 11.2 mph | 26% |
| 3 p.m. | 76°F | 60°F | 59% | 11.7 mph | – |
| 6 p.m. | 72°F | 60°F | 66% | 8.8 mph | 36% |
| 9 p.m. | 69°F | 60°F | 75% | 6.4 mph | 55% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014839. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Milwaukee?
The warmest August temperature on Milwaukee's official record (since 1871) is 103°F, on August 1, 1988; the coldest is 42°F, on August 23, 1875. The wettest August brought 9.05 in (1987).
The August mean against the 1991-2020 normal of 72.3°F: 2021 75.5°F (+3.2), 2022 73.1°F (+0.8), 2023 72.9°F (+0.6), 2024 72.3°F (at normal), 2025 70.1°F (−2.2), 2026 71.7°F (−0.6). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 75.5°F | +3.2°F | 4.77 in |
| 2022 | 73.1°F | +0.8°F | 3.02 in |
| 2023 | 72.9°F | +0.6°F | 2.60 in |
| 2024 | 72.3°F | at normal | 4.38 in |
| 2025 | 70.1°F | −2.2°F | 8.94 in |
| 2026 | 71.7°F | −0.6°F | 4.05 in |
Source: records: ACIS, NWS threaded record MKEthr; recent months: ACIS, station USW00014839. Records and recent months use complete months only.
How does August in Milwaukee 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; Milwaukee's is 80°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.