Weather Almanac: Alamosa, CO 81101

🗓️ Historical norms for September 2026

September avg. precipitation
🌧️ 1.11"
September days below freezing
📉 ≈10.0 days
Average September lows ≈35.4°F
USDA Zone
4b
Annual extreme lows -25°F to -20°F
Last Spring Frost (36°F)
🌷 Always
First Fall Frost (36°F)
🍂 Always
Tue. September 1  

🌅 6:33 a.m.

H: ≈76.8°F

L: ≈40.6°F

🌇 7:32 p.m.

Wed. September 2  

🌅 6:34 a.m.

H: ≈76.7°F

L: ≈40.3°F

🌇 7:30 p.m.

Thu. September 3  

🌅 6:35 a.m.

H: ≈76.6°F

L: ≈40.0°F

🌇 7:29 p.m.

Fri. September 4  

🌅 6:36 a.m.

H: ≈76.5°F

L: ≈39.7°F

🌇 7:27 p.m.

Sat. September 5  

🌅 6:37 a.m.

H: ≈76.3°F

L: ≈39.3°F

🌇 7:26 p.m.

Sun. September 6  

🌅 6:38 a.m.

H: ≈76.2°F

L: ≈39.0°F

🌇 7:24 p.m.

Mon. September 7 Labor Day  

🌅 6:38 a.m.

H: ≈76.0°F

L: ≈38.6°F

🌇 7:23 p.m.

Tue. September 8  

🌅 6:39 a.m.

H: ≈75.8°F

L: ≈38.3°F

🌇 7:21 p.m.

Wed. September 9  

🌅 6:40 a.m.

H: ≈75.6°F

L: ≈37.9°F

🌇 7:20 p.m.

Thu. September 10  

🌅 6:41 a.m.

H: ≈75.4°F

L: ≈37.5°F

🌇 7:18 p.m.

Fri. September 11  

🌅 6:42 a.m.

H: ≈75.2°F

L: ≈37.2°F

🌇 7:17 p.m.

Sat. September 12  

🌅 6:43 a.m.

H: ≈75.0°F

L: ≈36.8°F

🌇 7:15 p.m.

Sun. September 13  

🌅 6:43 a.m.

H: ≈74.7°F

L: ≈36.4°F

🌇 7:13 p.m.

Mon. September 14 Holy Cross  

🌅 6:44 a.m.

H: ≈74.5°F

L: ≈36.0°F

🌇 7:12 p.m.

Tue. September 15  

🌅 6:45 a.m.

H: ≈74.2°F

L: ≈35.6°F

🌇 7:10 p.m.

Wed. September 16  

🌅 6:46 a.m.

H: ≈74.0°F

L: ≈35.3°F

🌇 7:09 p.m.

Thu. September 17  

🌅 6:47 a.m.

H: ≈73.7°F

L: ≈34.9°F

🌇 7:07 p.m.

Fri. September 18  

🌅 6:48 a.m.

H: ≈73.4°F

L: ≈34.5°F

🌇 7:06 p.m.

Sat. September 19  

🌅 6:48 a.m.

H: ≈73.1°F

L: ≈34.1°F

🌇 7:04 p.m.

Sun. September 20  

🌅 6:49 a.m.

H: ≈72.8°F

L: ≈33.7°F

🌇 7:03 p.m.

Mon. September 21  

🌅 6:50 a.m.

H: ≈72.4°F

L: ≈33.3°F

🌇 7:01 p.m.

Tue. September 22 Autumn Equinox  

🌅 6:51 a.m.

H: ≈72.1°F

L: ≈33.0°F

🌇 7:00 p.m.

Wed. September 23  

🌅 6:52 a.m.

H: ≈71.8°F

L: ≈32.6°F

🌇 6:58 p.m.

Thu. September 24  

🌅 6:53 a.m.

H: ≈71.4°F

L: ≈32.2°F

🌇 6:56 p.m.

Fri. September 25  

🌅 6:53 a.m.

H: ≈71.1°F

L: ≈31.8°F

🌇 6:55 p.m.

Sat. September 26 🌕

🌅 6:54 a.m.

H: ≈70.7°F

L: ≈31.4°F

🌇 6:53 p.m.

Sun. September 27  

🌅 6:55 a.m.

H: ≈70.3°F

L: ≈31.1°F

🌇 6:52 p.m.

Mon. September 28  

🌅 6:56 a.m.

H: ≈70.0°F

L: ≈30.7°F

🌇 6:50 p.m.

Tue. September 29  

🌅 6:57 a.m.

H: ≈69.6°F

L: ≈30.3°F

🌇 6:49 p.m.

Wed. September 30  

🌅 6:58 a.m.

H: ≈69.2°F

L: ≈29.9°F

🌇 6:47 p.m.


Temperature climatic data from weather station: ALAMOSA 2S (USC00050128)

Precipitation climatic data from weather station: ALAMOSA 2S (USC00050128)

Agricultural climatic data from weather station: ALAMOSA SAN LUIS AP (USW00023061)