Milwaukee, WI weather in August
Expect warm, often humid weather with some rain in Milwaukee in August, with highs near 80°F and lows near 64°F. Rain falls on about 10 days. It is one of the warmest months in Milwaukee. Good for outdoor plans.
- Normal high
- 80°F
- Normal low
- 64°F
- Wet days
- 10
- 3.6 in total
- Muggy days
- 10
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 82°F | 78°F |
| Normal low | 65°F | 62°F |
| Chance of a wet day | 30% | 29% |
| Sunrise / sunset | 5:42 am / 8:13 pm | 6:15 am / 7:28 pm |
| Daylight | 14.5 h | 13.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am66°Fdew point 61°F
- 9 am73°Fdew point 62°F
- Noon77°Fdew point 61°F
- 3 pm77°Fdew point 61°F
- 6 pm74°Fdew point 61°F
- 9 pm70°Fdew point 61°F
NOAA hourly normals (local standard time) from Milwaukee Mitchell Airport (6 mi away); average wind 8 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F10 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph10 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more10 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 3.6 in; a dry August brings about 1.8 in and a wet one about 5.1 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20202010: average high 84°F
- Coolest August1997: average high 74°F
- Wettest August2020: 8.6 in
- Driest August2003: 0.6 in
- Highest reading97°F (August 1, 2006)
- Lowest reading46°F (August 31, 2009)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 82°F | 80°F | 74°F |
| Normal low | 65°F | 64°F | 56°F |
| Wet days | 10 | 10 | 9 |
| Comfortable days | 9 | 10 | 14 |
| Daylight | 15.0 h | 13.9 h | 12.5 h |
Highs change by -2°F from July and -6°F into September.
Nearby alternatives in August
- Warmer: Springfield, IL241 mi · high 85°F · 8 wet days
- Cooler: Sister Bay, WI153 mi · high 75°F · 9 wet days
How Milwaukee ranks in August
- Normal high308th warmest of 378 cities; 2nd of 5 in Wisconsin
- Wet days230th driest of 378
- Comfortable days66th most of 341
What to pack for Milwaukee in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 8 heating degree days and 232 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Milwaukee in August?
The normal high is 80°F and the normal low is 64°F. From 1991 to 2020 the hottest August reading was 97°F (August 1, 2006).
Does it rain a lot in Milwaukee in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 3.7 in. The wettest August in 1991-2020 was in 2020 (8.6 in); the driest was in 2003 (0.6 in).
Is August a good time to visit Milwaukee?
August ranks 5th of 12 months on our comfort score for Milwaukee (63 out of 100). It has about 10 comfortable days and about 3 days at 90°F or hotter. The best months are May, June and September.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Milwaukee Mitchell Airport (USW00014839), 5.8 mi S of the city center, 670 ft (55 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: General Mitchell International Airport (726400-14839), 5.8 mi S of the city center, 667 ft (52 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).