Weather in May 2025

Helena weather in May 2025

°C °F

The average weather in Helena in May

The weather in Helena in May is very cold with temperatures between 2°C and 15°C, warm clothes are a must.

You can expect rain for roughly half of the month of May in Helena. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.

You can expect a few days of snow in Helena during May. It’s important to get out your snow boots and warm mittens to stay warm while you explore Helena.

Our weather forecast can give you a great sense of what weather to expect in Helena in May 2025.

If you’re planning to visit Helena in the near future, we highly recommend that you review the 14 day weather forecast for Helena before you arrive.

Temperatures
15° / 2°
Rainy Days
9
Snowy Days
3
Dry Days
19
Rainfall
106
mm
Sun Hours
7.1
Hrs

Explore the weather in Helena in other months

Helena annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January -2° / -9° 6 10 16 39 mm
Awful
February -2° / -10° 6 5 18 47 mm
Awful
March 4° / -5° 8 10 15 62 mm
Awful
April 9° / -3° 8 10 12 86 mm
Awful
May 15° / 2° 9 19 3 106 mm
Bad
June 21° / 6° 8 22 0 105 mm
Ok
July 28° / 9° 3 28 0 45 mm
Perfect
August 26° / 10° 3 28 0 49 mm
Perfect
September 21° / 6° 3 26 1 44 mm
Good
October 11° / 0° 4 22 6 51 mm
Bad
November 3° / -6° 3 15 12 38 mm
Awful
December -3° / -10° 6 8 17 37 mm
Awful

Weather in Helena in May - FAQ

What is the average temperature in Helena in May?
The average temperature in Helena in May is 2/15° C.
What is the chance of rain in Helena in May?
On average, there are 9 rainy days in Helena during May.
Weather wise, is May a good time to visit Helena?
The weather in Helena in May is bad.
Can it snow in Helena in May?
On average, there are 3 snowy days in Helena in May.
More about the weather in Helena