Weather Almanac: Helmville, MT 59843

🗓️ Historical norms for May 2026

May avg. precipitation
🌧️ 1.68"
May days below freezing
📉 ≈15.2 days
Average May lows 30°F – 34°F
USDA Zone
5a
Annual extreme lows -20°F to -15°F
Last Spring Frost (36°F)
🌷 Always
First Fall Frost (36°F)
🍂 Always
Fri. May 1 🌕

🌅 6:16 a.m.

H: 49°F – 70°F

L: 21°F – 34°F

🌇 8:42 p.m.

Sat. May 2  

🌅 6:15 a.m.

H: 49°F – 70°F

L: 21°F – 34°F

🌇 8:43 p.m.

Sun. May 3  

🌅 6:13 a.m.

H: 49°F – 70°F

L: 21°F – 34°F

🌇 8:45 p.m.

Mon. May 4  

🌅 6:11 a.m.

H: 50°F – 71°F

L: 22°F – 34°F

🌇 8:46 p.m.

Tue. May 5  

🌅 6:10 a.m.

H: 50°F – 71°F

L: 22°F – 35°F

🌇 8:47 p.m.

Wed. May 6  

🌅 6:09 a.m.

H: 50°F – 71°F

L: 22°F – 35°F

🌇 8:49 p.m.

Thu. May 7  

🌅 6:07 a.m.

H: 51°F – 72°F

L: 23°F – 35°F

🌇 8:50 p.m.

Fri. May 8  

🌅 6:06 a.m.

H: 51°F – 72°F

L: 23°F – 36°F

🌇 8:51 p.m.

Sat. May 9 🌗

🌅 6:04 a.m.

H: 51°F – 72°F

L: 23°F – 36°F

🌇 8:52 p.m.

Sun. May 10  

🌅 6:03 a.m.

H: 51°F – 72°F

L: 24°F – 36°F

🌇 8:54 p.m.

Mon. May 11  

🌅 6:02 a.m.

H: 52°F – 73°F

L: 24°F – 37°F

🌇 8:55 p.m.

Tue. May 12  

🌅 6:00 a.m.

H: 52°F – 73°F

L: 25°F – 37°F

🌇 8:56 p.m.

Wed. May 13  

🌅 5:59 a.m.

H: 52°F – 73°F

L: 25°F – 37°F

🌇 8:58 p.m.

Thu. May 14 Ascension  

🌅 5:58 a.m.

H: 53°F – 74°F

L: 25°F – 38°F

🌇 8:59 p.m.

Fri. May 15  

🌅 5:56 a.m.

H: 53°F – 74°F

L: 26°F – 38°F

🌇 9:00 p.m.

Sat. May 16 🌑

🌅 5:55 a.m.

H: 53°F – 74°F

L: 26°F – 38°F

🌇 9:01 p.m.

Sun. May 17  

🌅 5:54 a.m.

H: 53°F – 74°F

L: 27°F – 39°F

🌇 9:02 p.m.

Mon. May 18  

🌅 5:53 a.m.

H: 54°F – 75°F

L: 27°F – 39°F

🌇 9:04 p.m.

Tue. May 19  

🌅 5:52 a.m.

H: 54°F – 75°F

L: 27°F – 39°F

🌇 9:05 p.m.

Wed. May 20  

🌅 5:51 a.m.

H: 54°F – 75°F

L: 28°F – 40°F

🌇 9:06 p.m.

Thu. May 21  

🌅 5:50 a.m.

H: 55°F – 75°F

L: 28°F – 40°F

🌇 9:07 p.m.

Fri. May 22  

🌅 5:49 a.m.

H: 55°F – 76°F

L: 28°F – 40°F

🌇 9:08 p.m.

Sat. May 23 🌓

🌅 5:48 a.m.

H: 55°F – 76°F

L: 29°F – 41°F

🌇 9:09 p.m.

Sun. May 24 Pentecost  

🌅 5:47 a.m.

H: 55°F – 76°F

L: 29°F – 41°F

🌇 9:11 p.m.

Mon. May 25 Memorial Day  

🌅 5:46 a.m.

H: 56°F – 76°F

L: 29°F – 41°F

🌇 9:12 p.m.

Tue. May 26  

🌅 5:45 a.m.

H: 56°F – 76°F

L: 30°F – 42°F

🌇 9:13 p.m.

Wed. May 27  

🌅 5:44 a.m.

H: 56°F – 77°F

L: 30°F – 42°F

🌇 9:14 p.m.

Thu. May 28  

🌅 5:44 a.m.

H: 56°F – 77°F

L: 30°F – 42°F

🌇 9:15 p.m.

Fri. May 29  

🌅 5:43 a.m.

H: 57°F – 77°F

L: 30°F – 42°F

🌇 9:16 p.m.

Sat. May 30  

🌅 5:42 a.m.

H: 57°F – 77°F

L: 31°F – 42°F

🌇 9:17 p.m.

Sun. May 31 🌕

🌅 5:42 a.m.

H: 57°F – 77°F

L: 31°F – 43°F

🌇 9:18 p.m.


Temperature climatic data from weather station: OVANDO 9 SSE (USC00246304)

Precipitation climatic data from weather station: OVANDO 9 SSE (USC00246304)

Agricultural climatic data from weather station: OVANDO 9 SSE (USC00246304)