Helena Weather in May
Thinking of visiting Helena in May? Expect moderate temperatures reaching 17°C (63°F) during the day, dropping to 4°C (39°F) at night, and be prepared for the wettest month of the year.
Rainfall in Helena in May
Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. Rain is expected on roughly 15 days, totalling around 59 mm (2.3 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Helena in May
Daytime temperatures in Helena reach 17°C (63°F) in May, dropping to 4°C (39°F) at night. The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 4°C (39°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Helena in May
The month enjoys around 282 hours of sunshine, creating mostly sunny days with good weather conditions.If you prefer dry days with pleasant temperatures, June, July, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Helena's climate page.
Helena Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
17°C (63°F)
Chance of Rain
49%
Precipitation
59 mm (2.3 in)
Rainy days
15 days
Humidity
53%
Sunshine
282 hours
Percentage Sunshine
61%
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
perfect weather
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unpleasant
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What to Wear in Helena in May
For Helena in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Helena in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Helena's climate page.
Temperature Rainfall Sunshine Humidity
See the full Helena climate overview or explore weather in the United States of America.
