Green Bay, WI weather in August
In August, Green Bay sees highs around 79°F and lows around 58°F: mild, with frequent rain. Expect about 10 wet days. It is one of the warmest months in Green Bay. Good for outdoor plans.
- Normal high
- 79°F
- Normal low
- 58°F
- Wet days
- 10
- 3.4 in total
- Muggy days
- 7
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 81°F | 77°F |
| Normal low | 60°F | 55°F |
| Chance of a wet day | 34% | 31% |
| Sunrise / sunset | 5:39 am / 8:17 pm | 6:13 am / 7:31 pm |
| Daylight | 14.7 h | 13.3 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 am62°Fdew point 59°F
- 9 am71°Fdew point 61°F
- Noon76°Fdew point 61°F
- 3 pm77°Fdew point 61°F
- 6 pm73°Fdew point 61°F
- 9 pm66°Fdew point 60°F
NOAA hourly normals (local standard time) from Green Bay (5 mi away); average wind 6 mph; clear or few clouds in 59% of daytime hours, mostly cloudy or overcast in 31%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F12 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph11 of 31
- Hot dayshigh 90°F or more1 of 31
- Muggy daysdaily mean dew point 65°F or more7 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 3.4 in; a dry August brings about 2.2 in and a wet one about 4.2 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 83°F
- Coolest August1997: average high 74°F
- Wettest August1995: 7.3 in
- Driest August2008: 0.6 in
- Highest reading97°F (August 7, 2001)
- Lowest reading39°F (August 21, 2004)
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 | 81°F | 79°F | 72°F |
| Normal low | 60°F | 58°F | 50°F |
| Wet days | 11 | 10 | 10 |
| Comfortable days | 10 | 12 | 15 |
| Daylight | 15.2 h | 14.0 h | 12.5 h |
Highs change by -2°F from July and -7°F into September.
Nearby alternatives in August
- Warmer: Davenport, IA244 mi · high 84°F · 9 wet days
How Green Bay ranks in August
- Normal high322nd warmest of 378 cities; 4th of 5 in Wisconsin
- Wet days276th driest of 378
- Comfortable days55th most of 341
What to pack for Green Bay in August
- A rain jacket or umbrella – rain on about 10 days
- A swimsuit – about 11 beach days
Heating and cooling
August has 27 heating degree days and 137 cooling degree days (base 65°F), 2% of the year's total heating and cooling demand.
Questions
How hot is Green Bay in August?
The normal high is 79°F and the normal low is 58°F. From 1991 to 2020 the hottest August reading was 97°F (August 7, 2001).
Does it rain a lot in Green Bay in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 3.4 in. The wettest August in 1991-2020 was in 1995 (7.3 in); the driest was in 2008 (0.6 in).
Is August a good time to visit Green Bay?
August ranks 4th of 12 months on our comfort score for Green Bay (67 out of 100). It has about 12 comfortable days and about 1 day 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, humidity and wind by hour and cloud cover: Green Bay (USW00014898), 4.7 mi WSW of the city center, 682 ft (89 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Austin Straubel International Airport (726450-14898), 6.4 mi WSW of the city center, 684 ft (91 ft higher than the city). Hourly observations, 1991-2020.