Weather Almanac: Boulder, WY 82923

🗓️ Historical norms for May 2026

May avg. precipitation
🌧️ 1.30"
May days below freezing
📉 ≈20.1 days
Average May lows 27°F – 31°F
USDA Zone
4a
Annual extreme lows -30°F to -25°F
Last Spring Frost (36°F)
🌷 Always
First Fall Frost (36°F)
🍂 Always
Fri. May 1 🌕

🌅 6:12 a.m.

H: 48°F – 67°F

L: 18°F – 30°F

🌇 8:17 p.m.

Sat. May 2  

🌅 6:10 a.m.

H: 48°F – 67°F

L: 18°F – 31°F

🌇 8:19 p.m.

Sun. May 3  

🌅 6:09 a.m.

H: 48°F – 68°F

L: 19°F – 31°F

🌇 8:20 p.m.

Mon. May 4  

🌅 6:08 a.m.

H: 49°F – 68°F

L: 19°F – 31°F

🌇 8:21 p.m.

Tue. May 5  

🌅 6:06 a.m.

H: 49°F – 69°F

L: 19°F – 32°F

🌇 8:22 p.m.

Wed. May 6  

🌅 6:05 a.m.

H: 49°F – 69°F

L: 20°F – 32°F

🌇 8:23 p.m.

Thu. May 7  

🌅 6:04 a.m.

H: 50°F – 69°F

L: 20°F – 32°F

🌇 8:24 p.m.

Fri. May 8  

🌅 6:03 a.m.

H: 50°F – 69°F

L: 20°F – 33°F

🌇 8:25 p.m.

Sat. May 9 🌗

🌅 6:01 a.m.

H: 50°F – 70°F

L: 21°F – 33°F

🌇 8:26 p.m.

Sun. May 10  

🌅 6:00 a.m.

H: 51°F – 70°F

L: 21°F – 33°F

🌇 8:27 p.m.

Mon. May 11  

🌅 5:59 a.m.

H: 51°F – 70°F

L: 21°F – 34°F

🌇 8:28 p.m.

Tue. May 12  

🌅 5:58 a.m.

H: 51°F – 71°F

L: 22°F – 34°F

🌇 8:30 p.m.

Wed. May 13  

🌅 5:57 a.m.

H: 52°F – 71°F

L: 22°F – 35°F

🌇 8:31 p.m.

Thu. May 14 Ascension  

🌅 5:56 a.m.

H: 52°F – 71°F

L: 23°F – 35°F

🌇 8:32 p.m.

Fri. May 15  

🌅 5:55 a.m.

H: 52°F – 71°F

L: 23°F – 35°F

🌇 8:33 p.m.

Sat. May 16 🌑

🌅 5:54 a.m.

H: 53°F – 72°F

L: 23°F – 36°F

🌇 8:34 p.m.

Sun. May 17  

🌅 5:53 a.m.

H: 53°F – 72°F

L: 24°F – 36°F

🌇 8:35 p.m.

Mon. May 18  

🌅 5:52 a.m.

H: 53°F – 72°F

L: 24°F – 36°F

🌇 8:36 p.m.

Tue. May 19  

🌅 5:51 a.m.

H: 54°F – 73°F

L: 24°F – 37°F

🌇 8:37 p.m.

Wed. May 20  

🌅 5:50 a.m.

H: 54°F – 73°F

L: 25°F – 37°F

🌇 8:38 p.m.

Thu. May 21  

🌅 5:49 a.m.

H: 54°F – 73°F

L: 25°F – 37°F

🌇 8:39 p.m.

Fri. May 22  

🌅 5:48 a.m.

H: 55°F – 74°F

L: 25°F – 38°F

🌇 8:40 p.m.

Sat. May 23 🌓

🌅 5:48 a.m.

H: 55°F – 74°F

L: 26°F – 38°F

🌇 8:41 p.m.

Sun. May 24 Pentecost  

🌅 5:47 a.m.

H: 55°F – 74°F

L: 26°F – 38°F

🌇 8:42 p.m.

Mon. May 25 Memorial Day  

🌅 5:46 a.m.

H: 56°F – 74°F

L: 26°F – 39°F

🌇 8:43 p.m.

Tue. May 26  

🌅 5:45 a.m.

H: 56°F – 75°F

L: 27°F – 39°F

🌇 8:43 p.m.

Wed. May 27  

🌅 5:45 a.m.

H: 56°F – 75°F

L: 27°F – 39°F

🌇 8:44 p.m.

Thu. May 28  

🌅 5:44 a.m.

H: 57°F – 75°F

L: 27°F – 40°F

🌇 8:45 p.m.

Fri. May 29  

🌅 5:44 a.m.

H: 57°F – 76°F

L: 28°F – 40°F

🌇 8:46 p.m.

Sat. May 30  

🌅 5:43 a.m.

H: 57°F – 76°F

L: 28°F – 40°F

🌇 8:47 p.m.

Sun. May 31 🌕

🌅 5:42 a.m.

H: 58°F – 76°F

L: 28°F – 40°F

🌇 8:48 p.m.


Temperature climatic data from weather station: BOULDER REARING STN (USC00480951)

Precipitation climatic data from weather station: BOULDER REARING STN (USC00480951)

Agricultural climatic data from weather station: BOULDER REARING STN (USC00480951)