Green Bay (WI)
May
Weather in Green Bay, Wisconsin for May 2026
Your guide to Green Bay weather in May - trends and predictions
Frost Advisory - See hour by hour.
Until now, May 2026 in Green Bay is slightly cooler than the historical average by -1.5 °F.
The forecast for the next days in Green Bay predicts temperatures to be around 15 °F, close to the historical average.
In general, the average temperature in Green Bay at the beginning of May is 14 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.1 °F by the end of May.
The climate of Green Bay in May is notably wet, with an average of 14 rainy days, and a total of 116.1 mm of precipitation.
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17
Dry days
14
Rainy days
0
Snow days
17°/7°
Temperatures
22 km/h
Avg max wind
75 %
Avg humidity
Green Bay Weather May
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Temperatures trend during May in Green Bay
See the weather trend as well as the moving average line
May weather in Green Bay day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Overcast | 11° /4° | 2.4 mm | 3 | |
| May 2 |  Moderate rain | 9° /3° | 11.5 mm | 4 | |
| May 3 |  Fog | 16° /6° | 5.3 mm | 3 | |
| May 4 |  Light rain shower | 19° /5° | 0.5 mm | 5 | |
| May 5 | Mist | 14° /3° | 0 mm | 5 | |
| May 6 |  Sunny | 15° /4° | 0.2 mm | 6 | |
| May 7 | Light rain shower | 14° /4° | 5.9 mm | 4 | |
| May 8 | Patchy rain possible | 18° /3° | 0.2 mm | 6 | |
| May 9 | Patchy rain possible | 16° /4° | 0.1 mm | 5 | |
| May 10 |  Partly cloudy | 13° /2° | 0.1 mm | 6.1 | |
| May 11 | Sunny | 13° /0° | 0 mm | 6 | |
| May 12 | Moderate rain | 17° /3° | 8.4 mm | 0.1 | |
| May 13 | Patchy rain possible | 11° /5° | 0.8 mm | 2 | |
| May 14 | Patchy rain possible | 17° /3° | 0.4 mm | 2 | |
| May 15 | Patchy rain possible | 14° /7° | 0.4 mm | 3 | |
| May 16 | Patchy rain possible | 11° /7° | 2.1 mm | 2 | |
| May 17 | Sunny | 23° /15° | 0 mm | 5 | |
| May 18 | Patchy rain possible | 19° /12° | 1.8 mm | 4 | |
| May 19 | Sunny | 18° /9° | 0 mm | 4 | |
| May 20 | Patchy rain possible | 20° /10° | 0.7 mm | 4 | |
| May 21 |  Cloudy | 16° /8° | 0 mm | 3 | |
| May 22 | Patchy rain possible | 10° /8° | 2 mm | 2 | |
| May 23 | Patchy rain possible | 12° /7° | 0 mm | 2 | |
| May 24 | Light rain shower | 18° /8° | 1.3 mm | 5 | |
| May 25 | Partly cloudy | 19° /6° | 0 mm | 5 | |
| May 26 | Light rain shower | 18° /10° | 7.5 mm | 5 | |
| May 27 |  Light rain | 16° /8° | 10.2 mm | 4 | |
| May 28 | Light rain shower | 15° /9° | 5.6 mm | 4 | |
| May 29 | Patchy rain possible | 19° /8° | 0 mm | 5 | |
| May 30 | Sunny | 20° /9° | 0 mm | 5 | |
| May 31 | Overcast | 20° /7° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Green Bay in May 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 Green Bay forecast closer to your planned date for the most up-to-date weather information.
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Green Bay in May - FAQ
What are the expected maximum and minimum temperatures in Green Bay during May?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Green Bay during May?
Significant rainfall exceeding 116.1 mm is expected in Green Bay during May, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Green Bay during May?
The average wind speed in Green Bay during May is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Green Bay
Explore the daily rainfall trends and prepare for Green Bays May weather 💧
Typically, Green Bay has 14 rainy days in May with a total of 116.1 mm of rainfall.
UV exposure in Green Bay during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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