Brown County (Green Bay)
September
Weather in Brown County, Wisconsin for September 2027
Your guide to Brown County weather in September - trends and predictions
In general, the average temperature in Brown County at the beginning of September is 22.4 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 22.1 °C by the end of September.
Brown County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 239.6 mm.
Is September a good time to visit Brown County? check out the best time to travel to Brown County page.
✨ Is September a good time to visit Brown County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
23°/12°
Temperatures
18 km/h
Avg max wind
75 %
Avg humidity
Brown County Weather September
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Temperatures trend during September in Brown County
See the weather trend as well as the moving average line
September weather in Brown County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 27° /15° | 0 mm | 6 | |
| Sept. 2 |  Heavy rain | 24° /13° | 158.2 mm | 4 | |
| Sept. 3 |  Moderate rain | 23° /13° | 13.7 mm | 5 | |
| Sept. 4 | Moderate rain | 22° /11° | 18.2 mm | 3 | |
| Sept. 5 |  Light rain | 22° /14° | 5.5 mm | 3 | |
| Sept. 6 |  Patchy rain possible | 19° /9° | 0.1 mm | 5 | |
| Sept. 7 |  Overcast | 20° /7° | 0 mm | 4 | |
| Sept. 8 | Moderate rain | 22° /9° | 11.4 mm | 4 | |
| Sept. 9 | Overcast | 26° /14° | 0 mm | 6 | |
| Sept. 10 |  Cloudy | 25° /14° | 0 mm | 6 | |
| Sept. 11 | Patchy rain possible | 25° /14° | 0 mm | 6 | |
| Sept. 12 |  Sunny | 26° /14° | 0.2 mm | 5 | |
| Sept. 13 | Light rain | 23° /14° | 4.1 mm | 5 | |
| Sept. 14 | Patchy rain possible | 25° /12° | 1.7 mm | 6 | |
| Sept. 15 | Light rain | 27° /15° | 5.1 mm | 4 | |
| Sept. 16 | Sunny | 26° /13° | 0 mm | 5 | |
| Sept. 17 | Partly cloudy | 25° /14° | 0.2 mm | 5 | |
| Sept. 18 | Light rain | 22° /13° | 5.4 mm | 4 | |
| Sept. 19 |  Mist | 20° /12° | 0.9 mm | 4 | |
| Sept. 20 | Light rain | 20° /14° | 7 mm | 4 | |
| Sept. 21 | Sunny | 22° /13° | 0 mm | 4 | |
| Sept. 22 | Patchy rain possible | 18° /13° | 1.3 mm | 4 | |
| Sept. 23 | Sunny | 20° /11° | 0 mm | 5 | |
| Sept. 24 | Fog | 20° /10° | 0 mm | 4 | |
| Sept. 25 | Mist | 22° /12° | 0.1 mm | 4 | |
| Sept. 26 | Mist | 21° /11° | 0 mm | 4 | |
| Sept. 27 | Fog | 24° /10° | 0 mm | 4 | |
| Sept. 28 | Fog | 23° /11° | 0 mm | 4.8 | |
| Sept. 29 | Fog | 23° /11° | 0.1 mm | 4 | |
| Sept. 30 | Light rain | 22° /12° | 6.3 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Brown County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Brown County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Brown County in September - FAQ
What are the expected maximum and minimum temperatures in Brown County during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Brown County during September?
Significant rainfall exceeding 239.6 mm is expected in Brown County during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Brown County during September?
The average wind speed in Brown County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Brown County
Explore the daily rainfall trends and prepare for Brown Countys September weather 💧
Typically, Brown County has 6 rainy days in September with a total of 239.6 mm of rainfall.
UV exposure in Brown County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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