Average data for 10 years
1 May
Wednesday
+10°
+3°
2 May
Thursday
+10°
+4°
3 May
Friday
+11°
+6°
4 May
Saturday
+12°
+6°
5 May
Sunday
+11°
+4°
6 May
Monday
+8°
+3°
7 May
Tuesday
+11°
+6°
8 May
Wednesday
+12°
+6°
9 May
Thursday
+11°
+5°
10 May
Friday
+10°
+4°
11 May
Saturday
+11°
+5°
12 May
Sunday
+12°
+5°
13 May
Monday
+12°
+6°
14 May
Tuesday
+13°
+7°
15 May
Wednesday
+13°
+8°
16 May
Thursday
+14°
+9°
17 May
Friday
+14°
+8°
18 May
Saturday
+14°
+7°
19 May
Sunday
+12°
+7°
20 May
Monday
+15°
+9°
21 May
Tuesday
+14°
+7°
22 May
Wednesday
+13°
+7°
23 May
Thursday
+10°
+5°
24 May
Friday
+12°
+7°
25 May
Saturday
+12°
+6°
26 May
Sunday
+12°
+7°
27 May
Monday
+11°
+5°
28 May
Tuesday
+13°
+8°
29 May
Wednesday
+15°
+9°
30 May
Thursday
+15°
+9°
31 May
Friday
+15°
+9°
Cities near you
Canada
Medicine Hat
United States
Whitefish
Canada
Brooks
United States
Jackson
United States
Big Sky
Cities with similar weather in May
Kyrgyzstan
Cholpon-Ata
Norway
Oslo
Ireland
Dublin
China
Altay
Mongolia
Ulan Bator
May in Helena is the rainiest month of the year. In May, the weather in Helena is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Helena has 22 rainy, 4 sunny, 3 partly cloudy, and 2 cloudy days in May. The rains are usually heavy. May as well as March and April is considered the most uncomfortable time to visit Helena.