Weather Almanac: Green Bay, WI 54311

🗓️ Historical norms for September 2026

September avg. precipitation
🌧️ 3.52"
September days below freezing
📉 ≈0.0 days
Average September lows ≈49.1°F
USDA Zone
5b
Annual extreme lows -15°F to -10°F
Last Spring Frost (36°F)
🌷 May 25
First Fall Frost (36°F)
🍂 Sep 20
Tue. September 1  

🌅 6:14 a.m.

H: ≈75.6°F

L: ≈54.2°F

🌇 7:27 p.m.

Wed. September 2  

🌅 6:15 a.m.

H: ≈75.3°F

L: ≈53.9°F

🌇 7:26 p.m.

Thu. September 3  

🌅 6:16 a.m.

H: ≈75.0°F

L: ≈53.6°F

🌇 7:24 p.m.

Fri. September 4  

🌅 6:17 a.m.

H: ≈74.7°F

L: ≈53.3°F

🌇 7:22 p.m.

Sat. September 5  

🌅 6:19 a.m.

H: ≈74.4°F

L: ≈53.0°F

🌇 7:20 p.m.

Sun. September 6  

🌅 6:20 a.m.

H: ≈74.0°F

L: ≈52.7°F

🌇 7:18 p.m.

Mon. September 7 Labor Day  

🌅 6:21 a.m.

H: ≈73.7°F

L: ≈52.3°F

🌇 7:16 p.m.

Tue. September 8  

🌅 6:22 a.m.

H: ≈73.3°F

L: ≈52.0°F

🌇 7:15 p.m.

Wed. September 9  

🌅 6:23 a.m.

H: ≈72.9°F

L: ≈51.6°F

🌇 7:13 p.m.

Thu. September 10  

🌅 6:24 a.m.

H: ≈72.5°F

L: ≈51.3°F

🌇 7:11 p.m.

Fri. September 11  

🌅 6:26 a.m.

H: ≈72.1°F

L: ≈50.9°F

🌇 7:09 p.m.

Sat. September 12  

🌅 6:27 a.m.

H: ≈71.7°F

L: ≈50.5°F

🌇 7:07 p.m.

Sun. September 13  

🌅 6:28 a.m.

H: ≈71.3°F

L: ≈50.2°F

🌇 7:05 p.m.

Mon. September 14 Holy Cross  

🌅 6:29 a.m.

H: ≈70.9°F

L: ≈49.8°F

🌇 7:03 p.m.

Tue. September 15  

🌅 6:30 a.m.

H: ≈70.5°F

L: ≈49.4°F

🌇 7:01 p.m.

Wed. September 16  

🌅 6:31 a.m.

H: ≈70.0°F

L: ≈49.0°F

🌇 7:00 p.m.

Thu. September 17  

🌅 6:33 a.m.

H: ≈69.6°F

L: ≈48.6°F

🌇 6:58 p.m.

Fri. September 18  

🌅 6:34 a.m.

H: ≈69.1°F

L: ≈48.2°F

🌇 6:56 p.m.

Sat. September 19  

🌅 6:35 a.m.

H: ≈68.7°F

L: ≈47.8°F

🌇 6:54 p.m.

Sun. September 20  

🌅 6:36 a.m.

H: ≈68.2°F

L: ≈47.4°F

🌇 6:52 p.m.

Mon. September 21  

🌅 6:37 a.m.

H: ≈67.7°F

L: ≈47.0°F

🌇 6:50 p.m.

Tue. September 22 Autumn Equinox  

🌅 6:38 a.m.

H: ≈67.3°F

L: ≈46.6°F

🌇 6:48 p.m.

Wed. September 23  

🌅 6:40 a.m.

H: ≈66.8°F

L: ≈46.3°F

🌇 6:46 p.m.

Thu. September 24  

🌅 6:41 a.m.

H: ≈66.3°F

L: ≈45.9°F

🌇 6:45 p.m.

Fri. September 25  

🌅 6:42 a.m.

H: ≈65.9°F

L: ≈45.5°F

🌇 6:43 p.m.

Sat. September 26 🌕

🌅 6:43 a.m.

H: ≈65.4°F

L: ≈45.1°F

🌇 6:41 p.m.

Sun. September 27  

🌅 6:44 a.m.

H: ≈65.0°F

L: ≈44.7°F

🌇 6:39 p.m.

Mon. September 28  

🌅 6:45 a.m.

H: ≈64.5°F

L: ≈44.3°F

🌇 6:37 p.m.

Tue. September 29  

🌅 6:47 a.m.

H: ≈64.0°F

L: ≈44.0°F

🌇 6:35 p.m.

Wed. September 30  

🌅 6:48 a.m.

H: ≈63.6°F

L: ≈43.6°F

🌇 6:33 p.m.


Temperature climatic data from weather station: DENMARK WWTP (USC00472055)

Precipitation climatic data from weather station: DENMARK WWTP (USC00472055)

Agricultural climatic data from weather station: GREEN BAY (USW00014898)