Weather Almanac: Frenchtown, MT 59834

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 1.15"
September days below freezing
📉 ≈1.8 days
Average September lows ≈40.2°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 Always
First Fall Frost (36°F)
🍂 Always
Mon. September 1 Labor Day  

🌅 6:56 a.m.

H: ≈78.6°F

L: ≈44.5°F

🌇 8:15 p.m.

Tue. September 2  

🌅 6:58 a.m.

H: ≈78.2°F

L: ≈44.2°F

🌇 8:13 p.m.

Wed. September 3  

🌅 6:59 a.m.

H: ≈77.8°F

L: ≈44.0°F

🌇 8:11 p.m.

Thu. September 4  

🌅 7:00 a.m.

H: ≈77.4°F

L: ≈43.7°F

🌇 8:09 p.m.

Fri. September 5  

🌅 7:02 a.m.

H: ≈77.0°F

L: ≈43.4°F

🌇 8:07 p.m.

Sat. September 6  

🌅 7:03 a.m.

H: ≈76.6°F

L: ≈43.1°F

🌇 8:05 p.m.

Sun. September 7 🌕

🌅 7:04 a.m.

H: ≈76.2°F

L: ≈42.9°F

🌇 8:03 p.m.

Mon. September 8  

🌅 7:05 a.m.

H: ≈75.7°F

L: ≈42.6°F

🌇 8:01 p.m.

Tue. September 9  

🌅 7:07 a.m.

H: ≈75.3°F

L: ≈42.3°F

🌇 7:59 p.m.

Wed. September 10  

🌅 7:08 a.m.

H: ≈74.9°F

L: ≈42.0°F

🌇 7:57 p.m.

Thu. September 11  

🌅 7:09 a.m.

H: ≈74.4°F

L: ≈41.7°F

🌇 7:55 p.m.

Fri. September 12  

🌅 7:11 a.m.

H: ≈74.0°F

L: ≈41.4°F

🌇 7:53 p.m.

Sat. September 13  

🌅 7:12 a.m.

H: ≈73.5°F

L: ≈41.1°F

🌇 7:51 p.m.

Sun. September 14 Holy Cross 🌗

🌅 7:13 a.m.

H: ≈73.1°F

L: ≈40.8°F

🌇 7:49 p.m.

Mon. September 15  

🌅 7:15 a.m.

H: ≈72.6°F

L: ≈40.5°F

🌇 7:47 p.m.

Tue. September 16  

🌅 7:16 a.m.

H: ≈72.1°F

L: ≈40.2°F

🌇 7:45 p.m.

Wed. September 17  

🌅 7:17 a.m.

H: ≈71.6°F

L: ≈39.9°F

🌇 7:43 p.m.

Thu. September 18  

🌅 7:19 a.m.

H: ≈71.2°F

L: ≈39.6°F

🌇 7:41 p.m.

Fri. September 19  

🌅 7:20 a.m.

H: ≈70.7°F

L: ≈39.2°F

🌇 7:39 p.m.

Sat. September 20  

🌅 7:21 a.m.

H: ≈70.2°F

L: ≈38.9°F

🌇 7:37 p.m.

Sun. September 21 🌑

🌅 7:22 a.m.

H: ≈69.7°F

L: ≈38.6°F

🌇 7:35 p.m.

Mon. September 22 Autumn Equinox  

🌅 7:24 a.m.

H: ≈69.2°F

L: ≈38.2°F

🌇 7:33 p.m.

Tue. September 23  

🌅 7:25 a.m.

H: ≈68.7°F

L: ≈37.9°F

🌇 7:31 p.m.

Wed. September 24  

🌅 7:26 a.m.

H: ≈68.2°F

L: ≈37.5°F

🌇 7:29 p.m.

Thu. September 25  

🌅 7:28 a.m.

H: ≈67.7°F

L: ≈37.2°F

🌇 7:27 p.m.

Fri. September 26  

🌅 7:29 a.m.

H: ≈67.2°F

L: ≈36.8°F

🌇 7:25 p.m.

Sat. September 27  

🌅 7:30 a.m.

H: ≈66.7°F

L: ≈36.5°F

🌇 7:23 p.m.

Sun. September 28  

🌅 7:32 a.m.

H: ≈66.3°F

L: ≈36.1°F

🌇 7:21 p.m.

Mon. September 29 🌓

🌅 7:33 a.m.

H: ≈65.8°F

L: ≈35.7°F

🌇 7:19 p.m.

Tue. September 30  

🌅 7:34 a.m.

H: ≈65.3°F

L: ≈35.4°F

🌇 7:17 p.m.


Temperature climatic data from weather station: MISSOULA 6 NW WFO (USC00245740)

Precipitation climatic data from weather station: MISSOULA 6 NW WFO (USC00245740)

Agricultural climatic data from weather station: MISSOULA INTL AP (USW00024153)