Weather Almanac: Ulm, MT 59485

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 1.22"
September days below freezing
📉 ≈4.0 days
Average September lows 38°F – 43°F
USDA Zone
4a
Annual extreme lows -30°F to -25°F
Last Spring Frost (36°F)
🌷 Always
First Fall Frost (36°F)
🍂 Always
Mon. September 1 Labor Day  

🌅 6:45 a.m.

H: 67°F – 87°F

L: 38°F – 51°F

🌇 8:05 p.m.

Tue. September 2  

🌅 6:47 a.m.

H: 66°F – 87°F

L: 38°F – 51°F

🌇 8:03 p.m.

Wed. September 3  

🌅 6:48 a.m.

H: 66°F – 87°F

L: 37°F – 51°F

🌇 8:01 p.m.

Thu. September 4  

🌅 6:49 a.m.

H: 65°F – 86°F

L: 37°F – 51°F

🌇 7:59 p.m.

Fri. September 5  

🌅 6:50 a.m.

H: 65°F – 86°F

L: 37°F – 50°F

🌇 7:57 p.m.

Sat. September 6  

🌅 6:52 a.m.

H: 64°F – 86°F

L: 36°F – 50°F

🌇 7:55 p.m.

Sun. September 7 🌕

🌅 6:53 a.m.

H: 64°F – 86°F

L: 36°F – 50°F

🌇 7:53 p.m.

Mon. September 8  

🌅 6:54 a.m.

H: 63°F – 85°F

L: 36°F – 50°F

🌇 7:51 p.m.

Tue. September 9  

🌅 6:56 a.m.

H: 63°F – 85°F

L: 35°F – 49°F

🌇 7:49 p.m.

Wed. September 10  

🌅 6:57 a.m.

H: 62°F – 85°F

L: 35°F – 49°F

🌇 7:47 p.m.

Thu. September 11  

🌅 6:58 a.m.

H: 62°F – 84°F

L: 35°F – 49°F

🌇 7:45 p.m.

Fri. September 12  

🌅 7:00 a.m.

H: 61°F – 84°F

L: 34°F – 49°F

🌇 7:43 p.m.

Sat. September 13  

🌅 7:01 a.m.

H: 61°F – 84°F

L: 34°F – 48°F

🌇 7:41 p.m.

Sun. September 14 Holy Cross 🌗

🌅 7:02 a.m.

H: 60°F – 83°F

L: 34°F – 48°F

🌇 7:39 p.m.

Mon. September 15  

🌅 7:04 a.m.

H: 60°F – 83°F

L: 33°F – 48°F

🌇 7:37 p.m.

Tue. September 16  

🌅 7:05 a.m.

H: 60°F – 83°F

L: 33°F – 48°F

🌇 7:35 p.m.

Wed. September 17  

🌅 7:06 a.m.

H: 59°F – 83°F

L: 33°F – 47°F

🌇 7:33 p.m.

Thu. September 18  

🌅 7:08 a.m.

H: 59°F – 82°F

L: 32°F – 47°F

🌇 7:31 p.m.

Fri. September 19  

🌅 7:09 a.m.

H: 58°F – 82°F

L: 32°F – 47°F

🌇 7:29 p.m.

Sat. September 20  

🌅 7:10 a.m.

H: 58°F – 82°F

L: 32°F – 47°F

🌇 7:27 p.m.

Sun. September 21 🌑

🌅 7:12 a.m.

H: 57°F – 81°F

L: 31°F – 47°F

🌇 7:25 p.m.

Mon. September 22 Autumn Equinox  

🌅 7:13 a.m.

H: 57°F – 81°F

L: 31°F – 46°F

🌇 7:23 p.m.

Tue. September 23  

🌅 7:14 a.m.

H: 56°F – 81°F

L: 30°F – 46°F

🌇 7:21 p.m.

Wed. September 24  

🌅 7:16 a.m.

H: 56°F – 80°F

L: 30°F – 46°F

🌇 7:19 p.m.

Thu. September 25  

🌅 7:17 a.m.

H: 56°F – 80°F

L: 30°F – 46°F

🌇 7:16 p.m.

Fri. September 26  

🌅 7:19 a.m.

H: 55°F – 80°F

L: 29°F – 45°F

🌇 7:14 p.m.

Sat. September 27  

🌅 7:20 a.m.

H: 55°F – 79°F

L: 29°F – 45°F

🌇 7:12 p.m.

Sun. September 28  

🌅 7:21 a.m.

H: 54°F – 79°F

L: 29°F – 45°F

🌇 7:10 p.m.

Mon. September 29 🌓

🌅 7:23 a.m.

H: 54°F – 79°F

L: 28°F – 45°F

🌇 7:08 p.m.

Tue. September 30  

🌅 7:24 a.m.

H: 54°F – 78°F

L: 28°F – 45°F

🌇 7:06 p.m.


Temperature climatic data from weather station: SUN RIVER 4 S (USC00248021)

Precipitation climatic data from weather station: SUN RIVER 4 S (USC00248021)

Agricultural climatic data from weather station: SUN RIVER 4 S (USC00248021)