Weather Almanac: Hays, MT 59527

🗓️ Historical norms for May 2026

May avg. precipitation
🌧️ 2.40"
May days below freezing
📉 ≈13.5 days
Average May lows ≈33.0°F
USDA Zone
4b
Annual extreme lows -25°F to -20°F
Last Spring Frost (36°F)
🌷 Jun 1
First Fall Frost (36°F)
🍂 Sep 9
Fri. May 1 🌕

🌅 5:56 a.m.

H: ≈62.3°F

L: ≈28.9°F

🌇 8:28 p.m.

Sat. May 2  

🌅 5:54 a.m.

H: ≈62.5°F

L: ≈29.2°F

🌇 8:29 p.m.

Sun. May 3  

🌅 5:53 a.m.

H: ≈62.8°F

L: ≈29.5°F

🌇 8:31 p.m.

Mon. May 4  

🌅 5:51 a.m.

H: ≈63.0°F

L: ≈29.8°F

🌇 8:32 p.m.

Tue. May 5  

🌅 5:50 a.m.

H: ≈63.2°F

L: ≈30.0°F

🌇 8:34 p.m.

Wed. May 6  

🌅 5:48 a.m.

H: ≈63.5°F

L: ≈30.3°F

🌇 8:35 p.m.

Thu. May 7  

🌅 5:47 a.m.

H: ≈63.7°F

L: ≈30.6°F

🌇 8:36 p.m.

Fri. May 8  

🌅 5:45 a.m.

H: ≈64.0°F

L: ≈30.9°F

🌇 8:38 p.m.

Sat. May 9 🌗

🌅 5:44 a.m.

H: ≈64.2°F

L: ≈31.2°F

🌇 8:39 p.m.

Sun. May 10  

🌅 5:42 a.m.

H: ≈64.5°F

L: ≈31.5°F

🌇 8:40 p.m.

Mon. May 11  

🌅 5:41 a.m.

H: ≈64.7°F

L: ≈31.8°F

🌇 8:42 p.m.

Tue. May 12  

🌅 5:39 a.m.

H: ≈65.0°F

L: ≈32.1°F

🌇 8:43 p.m.

Wed. May 13  

🌅 5:38 a.m.

H: ≈65.2°F

L: ≈32.4°F

🌇 8:44 p.m.

Thu. May 14 Ascension  

🌅 5:37 a.m.

H: ≈65.5°F

L: ≈32.7°F

🌇 8:46 p.m.

Fri. May 15  

🌅 5:35 a.m.

H: ≈65.8°F

L: ≈32.9°F

🌇 8:47 p.m.

Sat. May 16 🌑

🌅 5:34 a.m.

H: ≈66.0°F

L: ≈33.2°F

🌇 8:48 p.m.

Sun. May 17  

🌅 5:33 a.m.

H: ≈66.3°F

L: ≈33.5°F

🌇 8:50 p.m.

Mon. May 18  

🌅 5:32 a.m.

H: ≈66.6°F

L: ≈33.7°F

🌇 8:51 p.m.

Tue. May 19  

🌅 5:31 a.m.

H: ≈66.9°F

L: ≈34.0°F

🌇 8:52 p.m.

Wed. May 20  

🌅 5:29 a.m.

H: ≈67.2°F

L: ≈34.2°F

🌇 8:53 p.m.

Thu. May 21  

🌅 5:28 a.m.

H: ≈67.5°F

L: ≈34.5°F

🌇 8:55 p.m.

Fri. May 22  

🌅 5:27 a.m.

H: ≈67.8°F

L: ≈34.7°F

🌇 8:56 p.m.

Sat. May 23 🌓

🌅 5:26 a.m.

H: ≈68.1°F

L: ≈34.9°F

🌇 8:57 p.m.

Sun. May 24 Pentecost  

🌅 5:25 a.m.

H: ≈68.4°F

L: ≈35.2°F

🌇 8:58 p.m.

Mon. May 25 Memorial Day  

🌅 5:24 a.m.

H: ≈68.7°F

L: ≈35.4°F

🌇 8:59 p.m.

Tue. May 26  

🌅 5:24 a.m.

H: ≈69.0°F

L: ≈35.6°F

🌇 9:00 p.m.

Wed. May 27  

🌅 5:23 a.m.

H: ≈69.3°F

L: ≈35.8°F

🌇 9:01 p.m.

Thu. May 28  

🌅 5:22 a.m.

H: ≈69.7°F

L: ≈35.9°F

🌇 9:02 p.m.

Fri. May 29  

🌅 5:21 a.m.

H: ≈70.0°F

L: ≈36.1°F

🌇 9:03 p.m.

Sat. May 30  

🌅 5:20 a.m.

H: ≈70.3°F

L: ≈36.3°F

🌇 9:04 p.m.

Sun. May 31 🌕

🌅 5:20 a.m.

H: ≈70.6°F

L: ≈36.5°F

🌇 9:05 p.m.


Temperature climatic data from weather station: HARLEM 20S (USC00243934)

Precipitation climatic data from weather station: HARLEM 20S (USC00243934)

Agricultural climatic data from weather station: ROY 24 NE MOBRIDGE (USC00247234)