Weather Almanac: Rock Island, IL 61201

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 2.99"
September days below freezing
📉 ≈0.0 days
Average September lows 55°F – 60°F
USDA Zone
5b
Annual extreme lows -15°F to -10°F
Last Spring Frost (36°F)
🌷 Apr 28
First Fall Frost (36°F)
🍂 Oct 10
Mon. September 1 Labor Day  

🌅 6:28 a.m.

H: 74°F – 88°F

L: 57°F – 69°F

🌇 7:34 p.m.

Tue. September 2  

🌅 6:29 a.m.

H: 74°F – 88°F

L: 57°F – 69°F

🌇 7:33 p.m.

Wed. September 3  

🌅 6:30 a.m.

H: 74°F – 88°F

L: 56°F – 69°F

🌇 7:31 p.m.

Thu. September 4  

🌅 6:31 a.m.

H: 73°F – 88°F

L: 56°F – 69°F

🌇 7:29 p.m.

Fri. September 5  

🌅 6:32 a.m.

H: 73°F – 87°F

L: 56°F – 68°F

🌇 7:28 p.m.

Sat. September 6  

🌅 6:33 a.m.

H: 73°F – 87°F

L: 55°F – 68°F

🌇 7:26 p.m.

Sun. September 7 🌕

🌅 6:34 a.m.

H: 72°F – 87°F

L: 55°F – 68°F

🌇 7:24 p.m.

Mon. September 8  

🌅 6:35 a.m.

H: 72°F – 87°F

L: 54°F – 68°F

🌇 7:22 p.m.

Tue. September 9  

🌅 6:36 a.m.

H: 72°F – 87°F

L: 54°F – 67°F

🌇 7:21 p.m.

Wed. September 10  

🌅 6:37 a.m.

H: 71°F – 86°F

L: 53°F – 67°F

🌇 7:19 p.m.

Thu. September 11  

🌅 6:38 a.m.

H: 71°F – 86°F

L: 53°F – 67°F

🌇 7:17 p.m.

Fri. September 12  

🌅 6:39 a.m.

H: 70°F – 86°F

L: 53°F – 66°F

🌇 7:16 p.m.

Sat. September 13  

🌅 6:40 a.m.

H: 70°F – 86°F

L: 52°F – 66°F

🌇 7:14 p.m.

Sun. September 14 Holy Cross 🌗

🌅 6:41 a.m.

H: 69°F – 85°F

L: 52°F – 65°F

🌇 7:12 p.m.

Mon. September 15  

🌅 6:43 a.m.

H: 69°F – 85°F

L: 51°F – 65°F

🌇 7:10 p.m.

Tue. September 16  

🌅 6:44 a.m.

H: 68°F – 85°F

L: 51°F – 65°F

🌇 7:09 p.m.

Wed. September 17  

🌅 6:45 a.m.

H: 68°F – 85°F

L: 50°F – 64°F

🌇 7:07 p.m.

Thu. September 18  

🌅 6:46 a.m.

H: 68°F – 84°F

L: 50°F – 64°F

🌇 7:05 p.m.

Fri. September 19  

🌅 6:47 a.m.

H: 67°F – 84°F

L: 49°F – 63°F

🌇 7:04 p.m.

Sat. September 20  

🌅 6:48 a.m.

H: 67°F – 84°F

L: 49°F – 63°F

🌇 7:02 p.m.

Sun. September 21 🌑

🌅 6:49 a.m.

H: 66°F – 83°F

L: 48°F – 63°F

🌇 7:00 p.m.

Mon. September 22 Autumn Equinox  

🌅 6:50 a.m.

H: 65°F – 83°F

L: 48°F – 62°F

🌇 6:58 p.m.

Tue. September 23  

🌅 6:51 a.m.

H: 65°F – 83°F

L: 47°F – 62°F

🌇 6:57 p.m.

Wed. September 24  

🌅 6:52 a.m.

H: 65°F – 82°F

L: 46°F – 61°F

🌇 6:55 p.m.

Thu. September 25  

🌅 6:53 a.m.

H: 64°F – 82°F

L: 46°F – 61°F

🌇 6:53 p.m.

Fri. September 26  

🌅 6:54 a.m.

H: 63°F – 82°F

L: 45°F – 61°F

🌇 6:51 p.m.

Sat. September 27  

🌅 6:55 a.m.

H: 63°F – 81°F

L: 45°F – 60°F

🌇 6:50 p.m.

Sun. September 28  

🌅 6:56 a.m.

H: 62°F – 81°F

L: 44°F – 60°F

🌇 6:48 p.m.

Mon. September 29 🌓

🌅 6:57 a.m.

H: 62°F – 81°F

L: 44°F – 60°F

🌇 6:46 p.m.

Tue. September 30  

🌅 6:58 a.m.

H: 61°F – 80°F

L: 44°F – 59°F

🌇 6:45 p.m.


Temperature climatic data from weather station: ROCK ISLAND L&D 15 (USC00117391)

Precipitation climatic data from weather station: ROCK ISLAND L&D 15 (USC00117391)

Agricultural climatic data from weather station: ROCK ISLAND L&D 15 (USC00117391)