Climate averages 1991–2020
Green Bay weather
in July.
A warm, moderately wet month: the warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Green Bay: daytime highs average 26.7°C and nights cool to about 17.8°C. By daytime temperature it is the warmest month of the year.
Expect about 88 mm of rain on roughly 11 days, which makes July a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 11 min on an average July day.
The nearest other city in this atlas is Appleton (42 km away). In July its highs average 26.4°C, about as warm as Green Bay, with 86 mm of rain.
Among the 498 cities listed in the United States, Green Bay ranks joint 441st of 498 for the warmest July highs and joint 295th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Green Bay is 3.6°C cooler than that mean.
From July to August, average highs fall by 1.1°C to 25.6°C, and monthly rainfall falls from 88 mm to 87 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Green Bay climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -4.1°C-11.9°C | -11.9°C | 37 | 7.6 | 9.29 h |
| February | -2.3°C-10.8°C | -10.8°C | 33 | 6.5 | 10.410 h |
| March | 4.2°C-5.1°C | -5.1°C | 56 | 8.3 | 11.912 h |
| April | 11.3°C1.6°C | 1.6°C | 80 | 11.4 | 13.413 h |
| May | 18.5°C8.7°C | 8.7°C | 86 | 11.4 | 14.815 h |
| June | 24.1°C14.9°C | 14.9°C | 91 | 11.2 | 15.515 h |
| July, selected | 26.7°C17.8°C | 17.8°C | 88 | 11.2 | 15.215 h |
| August | 25.6°C17.3°C | 17.3°C | 87 | 10.4 | 14.014 h |
| September | 21.5°C13.3°C | 13.3°C | 67 | 9.1 | 12.613 h |
| October | 14.0°C6.6°C | 6.6°C | 71 | 9.5 | 11.011 h |
| November | 6.1°C-0.4°C | -0.4°C | 54 | 8.2 | 9.610 h |
| December | -0.6°C-7.2°C | -7.2°C | 45 | 7.3 | 8.99 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Appleton in JulyUnited States · 42 kmHigh 26.4°C · Low 17.7°C · 86 mm rain
- Milwaukee in JulyUnited States · 165 kmHigh 24.9°C · Low 20.1°C · 80 mm rain
- Waukesha in JulyUnited States · 168 kmHigh 27.0°C · Low 18.6°C · 86 mm rain
- Madison in JulyUnited States · 195 kmHigh 27.1°C · Low 17.9°C · 83 mm rain
- Racine in JulyUnited States · 200 kmHigh 24.9°C · Low 20.9°C · 73 mm rain
- Kenosha in JulyUnited States · 216 kmHigh 25.1°C · Low 21.1°C · 72 mm rain
- Waukegan in JulyUnited States · 240 kmHigh 25.3°C · Low 21.2°C · 78 mm rain
- Grand Rapids in JulyUnited States · 256 kmHigh 26.8°C · Low 18.0°C · 96 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Green Bay) is explained once on the Green Bay year overview and on the Sources, method and limits page.