Weather Almanac: Clinton, MT 59825

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 0.99"
September days below freezing
📉 ≈18.7 days
Average September lows 29°F – 32°F
USDA Zone
5b
Annual extreme lows -15°F to -10°F
Last Spring Frost (36°F)
🌷 Jun 12
First Fall Frost (36°F)
🍂 Sep 9
Mon. September 1 Labor Day  

🌅 6:55 a.m.

H: 68°F – 88°F

L: 29°F – 41°F

🌇 8:12 p.m.

Tue. September 2  

🌅 6:56 a.m.

H: 67°F – 87°F

L: 29°F – 40°F

🌇 8:11 p.m.

Wed. September 3  

🌅 6:57 a.m.

H: 67°F – 87°F

L: 28°F – 40°F

🌇 8:09 p.m.

Thu. September 4  

🌅 6:58 a.m.

H: 66°F – 87°F

L: 28°F – 40°F

🌇 8:07 p.m.

Fri. September 5  

🌅 7:00 a.m.

H: 66°F – 86°F

L: 28°F – 40°F

🌇 8:05 p.m.

Sat. September 6  

🌅 7:01 a.m.

H: 65°F – 86°F

L: 27°F – 39°F

🌇 8:03 p.m.

Sun. September 7 🌕

🌅 7:02 a.m.

H: 65°F – 86°F

L: 27°F – 39°F

🌇 8:01 p.m.

Mon. September 8  

🌅 7:04 a.m.

H: 64°F – 85°F

L: 27°F – 39°F

🌇 7:59 p.m.

Tue. September 9  

🌅 7:05 a.m.

H: 64°F – 85°F

L: 26°F – 39°F

🌇 7:57 p.m.

Wed. September 10  

🌅 7:06 a.m.

H: 64°F – 85°F

L: 26°F – 38°F

🌇 7:55 p.m.

Thu. September 11  

🌅 7:07 a.m.

H: 63°F – 84°F

L: 26°F – 38°F

🌇 7:53 p.m.

Fri. September 12  

🌅 7:09 a.m.

H: 63°F – 84°F

L: 25°F – 38°F

🌇 7:51 p.m.

Sat. September 13  

🌅 7:10 a.m.

H: 62°F – 84°F

L: 25°F – 38°F

🌇 7:49 p.m.

Sun. September 14 Holy Cross 🌗

🌅 7:11 a.m.

H: 62°F – 83°F

L: 25°F – 37°F

🌇 7:47 p.m.

Mon. September 15  

🌅 7:13 a.m.

H: 61°F – 83°F

L: 24°F – 37°F

🌇 7:45 p.m.

Tue. September 16  

🌅 7:14 a.m.

H: 61°F – 83°F

L: 24°F – 37°F

🌇 7:43 p.m.

Wed. September 17  

🌅 7:15 a.m.

H: 60°F – 82°F

L: 24°F – 37°F

🌇 7:41 p.m.

Thu. September 18  

🌅 7:16 a.m.

H: 60°F – 82°F

L: 23°F – 36°F

🌇 7:39 p.m.

Fri. September 19  

🌅 7:18 a.m.

H: 59°F – 82°F

L: 23°F – 36°F

🌇 7:37 p.m.

Sat. September 20  

🌅 7:19 a.m.

H: 59°F – 81°F

L: 23°F – 36°F

🌇 7:35 p.m.

Sun. September 21 🌑

🌅 7:20 a.m.

H: 58°F – 81°F

L: 22°F – 35°F

🌇 7:33 p.m.

Mon. September 22 Autumn Equinox  

🌅 7:22 a.m.

H: 58°F – 81°F

L: 22°F – 35°F

🌇 7:31 p.m.

Tue. September 23  

🌅 7:23 a.m.

H: 57°F – 80°F

L: 22°F – 35°F

🌇 7:29 p.m.

Wed. September 24  

🌅 7:24 a.m.

H: 57°F – 80°F

L: 21°F – 35°F

🌇 7:27 p.m.

Thu. September 25  

🌅 7:26 a.m.

H: 57°F – 79°F

L: 21°F – 34°F

🌇 7:25 p.m.

Fri. September 26  

🌅 7:27 a.m.

H: 56°F – 79°F

L: 21°F – 34°F

🌇 7:23 p.m.

Sat. September 27  

🌅 7:28 a.m.

H: 56°F – 78°F

L: 20°F – 34°F

🌇 7:21 p.m.

Sun. September 28  

🌅 7:29 a.m.

H: 55°F – 78°F

L: 20°F – 34°F

🌇 7:19 p.m.

Mon. September 29 🌓

🌅 7:31 a.m.

H: 55°F – 77°F

L: 20°F – 33°F

🌇 7:17 p.m.

Tue. September 30  

🌅 7:32 a.m.

H: 55°F – 77°F

L: 19°F – 33°F

🌇 7:15 p.m.


Temperature climatic data from weather station: POTOMAC (USC00246685)

Precipitation climatic data from weather station: POTOMAC (USC00246685)

Agricultural climatic data from weather station: MISSOULA 2 NE (USC00245735)