Weather Almanac: Dayton, MT 59914

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 1.32"
September days below freezing
📉 ≈0.9 days
Average September lows 43°F – 47°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 May 31
First Fall Frost (36°F)
🍂 Sep 17
Mon. September 1 Labor Day  

🌅 6:56 a.m.

H: 70°F – 87°F

L: 44°F – 54°F

🌇 8:17 p.m.

Tue. September 2  

🌅 6:57 a.m.

H: 69°F – 86°F

L: 44°F – 54°F

🌇 8:15 p.m.

Wed. September 3  

🌅 6:58 a.m.

H: 69°F – 86°F

L: 43°F – 54°F

🌇 8:13 p.m.

Thu. September 4  

🌅 7:00 a.m.

H: 69°F – 85°F

L: 43°F – 54°F

🌇 8:11 p.m.

Fri. September 5  

🌅 7:01 a.m.

H: 68°F – 85°F

L: 43°F – 53°F

🌇 8:09 p.m.

Sat. September 6  

🌅 7:02 a.m.

H: 68°F – 85°F

L: 42°F – 53°F

🌇 8:07 p.m.

Sun. September 7 🌕

🌅 7:04 a.m.

H: 67°F – 84°F

L: 42°F – 53°F

🌇 8:04 p.m.

Mon. September 8  

🌅 7:05 a.m.

H: 67°F – 84°F

L: 42°F – 52°F

🌇 8:02 p.m.

Tue. September 9  

🌅 7:06 a.m.

H: 66°F – 84°F

L: 41°F – 52°F

🌇 8:00 p.m.

Wed. September 10  

🌅 7:08 a.m.

H: 66°F – 83°F

L: 41°F – 52°F

🌇 7:58 p.m.

Thu. September 11  

🌅 7:09 a.m.

H: 65°F – 83°F

L: 41°F – 52°F

🌇 7:56 p.m.

Fri. September 12  

🌅 7:10 a.m.

H: 65°F – 82°F

L: 40°F – 51°F

🌇 7:54 p.m.

Sat. September 13  

🌅 7:12 a.m.

H: 65°F – 82°F

L: 40°F – 51°F

🌇 7:52 p.m.

Sun. September 14 Holy Cross 🌗

🌅 7:13 a.m.

H: 64°F – 82°F

L: 40°F – 51°F

🌇 7:50 p.m.

Mon. September 15  

🌅 7:14 a.m.

H: 64°F – 81°F

L: 39°F – 50°F

🌇 7:48 p.m.

Tue. September 16  

🌅 7:16 a.m.

H: 63°F – 81°F

L: 39°F – 50°F

🌇 7:46 p.m.

Wed. September 17  

🌅 7:17 a.m.

H: 63°F – 80°F

L: 39°F – 50°F

🌇 7:44 p.m.

Thu. September 18  

🌅 7:19 a.m.

H: 62°F – 80°F

L: 38°F – 50°F

🌇 7:42 p.m.

Fri. September 19  

🌅 7:20 a.m.

H: 62°F – 79°F

L: 38°F – 49°F

🌇 7:40 p.m.

Sat. September 20  

🌅 7:21 a.m.

H: 62°F – 79°F

L: 37°F – 49°F

🌇 7:38 p.m.

Sun. September 21 🌑

🌅 7:23 a.m.

H: 61°F – 79°F

L: 37°F – 49°F

🌇 7:36 p.m.

Mon. September 22 Autumn Equinox  

🌅 7:24 a.m.

H: 61°F – 78°F

L: 37°F – 49°F

🌇 7:34 p.m.

Tue. September 23  

🌅 7:25 a.m.

H: 60°F – 78°F

L: 36°F – 48°F

🌇 7:31 p.m.

Wed. September 24  

🌅 7:27 a.m.

H: 60°F – 77°F

L: 36°F – 48°F

🌇 7:29 p.m.

Thu. September 25  

🌅 7:28 a.m.

H: 59°F – 77°F

L: 36°F – 48°F

🌇 7:27 p.m.

Fri. September 26  

🌅 7:30 a.m.

H: 59°F – 76°F

L: 35°F – 47°F

🌇 7:25 p.m.

Sat. September 27  

🌅 7:31 a.m.

H: 59°F – 76°F

L: 35°F – 47°F

🌇 7:23 p.m.

Sun. September 28  

🌅 7:32 a.m.

H: 58°F – 75°F

L: 35°F – 47°F

🌇 7:21 p.m.

Mon. September 29 🌓

🌅 7:34 a.m.

H: 58°F – 74°F

L: 34°F – 47°F

🌇 7:19 p.m.

Tue. September 30  

🌅 7:35 a.m.

H: 57°F – 74°F

L: 34°F – 46°F

🌇 7:17 p.m.


Temperature climatic data from weather station: POLSON KERR DAM (USC00246640)

Precipitation climatic data from weather station: POLSON KERR DAM (USC00246640)

Agricultural climatic data from weather station: POLSON KERR DAM (USC00246640)