Weather Almanac: Avon, MT 59713

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 1.23"
September days below freezing
📉 ≈6.9 days
Average September lows ≈36.4°F
USDA Zone
4b
Annual extreme lows -25°F to -20°F
Last Spring Frost (36°F)
🌷 Always
First Fall Frost (36°F)
🍂 Always
Mon. September 1 Labor Day  

🌅 6:50 a.m.

H: ≈76.3°F

L: ≈39.9°F

🌇 8:08 p.m.

Tue. September 2  

🌅 6:52 a.m.

H: ≈76.0°F

L: ≈39.6°F

🌇 8:06 p.m.

Wed. September 3  

🌅 6:53 a.m.

H: ≈75.5°F

L: ≈39.4°F

🌇 8:04 p.m.

Thu. September 4  

🌅 6:54 a.m.

H: ≈75.1°F

L: ≈39.2°F

🌇 8:03 p.m.

Fri. September 5  

🌅 6:56 a.m.

H: ≈74.7°F

L: ≈38.9°F

🌇 8:01 p.m.

Sat. September 6  

🌅 6:57 a.m.

H: ≈74.3°F

L: ≈38.7°F

🌇 7:59 p.m.

Sun. September 7 🌕

🌅 6:58 a.m.

H: ≈73.8°F

L: ≈38.4°F

🌇 7:57 p.m.

Mon. September 8  

🌅 6:59 a.m.

H: ≈73.4°F

L: ≈38.2°F

🌇 7:55 p.m.

Tue. September 9  

🌅 7:01 a.m.

H: ≈73.0°F

L: ≈38.0°F

🌇 7:53 p.m.

Wed. September 10  

🌅 7:02 a.m.

H: ≈72.5°F

L: ≈37.7°F

🌇 7:51 p.m.

Thu. September 11  

🌅 7:03 a.m.

H: ≈72.1°F

L: ≈37.5°F

🌇 7:49 p.m.

Fri. September 12  

🌅 7:04 a.m.

H: ≈71.6°F

L: ≈37.3°F

🌇 7:47 p.m.

Sat. September 13  

🌅 7:06 a.m.

H: ≈71.1°F

L: ≈37.0°F

🌇 7:45 p.m.

Sun. September 14 Holy Cross 🌗

🌅 7:07 a.m.

H: ≈70.7°F

L: ≈36.8°F

🌇 7:43 p.m.

Mon. September 15  

🌅 7:08 a.m.

H: ≈70.2°F

L: ≈36.6°F

🌇 7:41 p.m.

Tue. September 16  

🌅 7:10 a.m.

H: ≈69.7°F

L: ≈36.3°F

🌇 7:39 p.m.

Wed. September 17  

🌅 7:11 a.m.

H: ≈69.2°F

L: ≈36.1°F

🌇 7:37 p.m.

Thu. September 18  

🌅 7:12 a.m.

H: ≈68.8°F

L: ≈35.9°F

🌇 7:35 p.m.

Fri. September 19  

🌅 7:13 a.m.

H: ≈68.3°F

L: ≈35.6°F

🌇 7:33 p.m.

Sat. September 20  

🌅 7:15 a.m.

H: ≈67.8°F

L: ≈35.4°F

🌇 7:31 p.m.

Sun. September 21 🌑

🌅 7:16 a.m.

H: ≈67.4°F

L: ≈35.1°F

🌇 7:29 p.m.

Mon. September 22 Autumn Equinox  

🌅 7:17 a.m.

H: ≈66.9°F

L: ≈34.9°F

🌇 7:27 p.m.

Tue. September 23  

🌅 7:19 a.m.

H: ≈66.4°F

L: ≈34.6°F

🌇 7:25 p.m.

Wed. September 24  

🌅 7:20 a.m.

H: ≈66.0°F

L: ≈34.4°F

🌇 7:23 p.m.

Thu. September 25  

🌅 7:21 a.m.

H: ≈65.5°F

L: ≈34.1°F

🌇 7:21 p.m.

Fri. September 26  

🌅 7:23 a.m.

H: ≈65.0°F

L: ≈33.8°F

🌇 7:19 p.m.

Sat. September 27  

🌅 7:24 a.m.

H: ≈64.6°F

L: ≈33.6°F

🌇 7:17 p.m.

Sun. September 28  

🌅 7:25 a.m.

H: ≈64.1°F

L: ≈33.3°F

🌇 7:15 p.m.

Mon. September 29 🌓

🌅 7:27 a.m.

H: ≈63.7°F

L: ≈33.0°F

🌇 7:13 p.m.

Tue. September 30  

🌅 7:28 a.m.

H: ≈63.2°F

L: ≈32.7°F

🌇 7:11 p.m.


Temperature climatic data from weather station: ELLISTON (USC00242738)

Precipitation climatic data from weather station: ELLISTON (USC00242738)

Agricultural climatic data from weather station: DEER LODGE 3 W (USC00242275)