Helena Weather History
Montana · US States · Weather data 1976–today
Helena sits 5187km from the equator, 1181m above sea level. That combination gives it a climate with warm summers and cold, snowy winters (Warm-summer humid continental climate). Its record high is 39.4°C, set 2026-08-01, its record low -42.2°C, set 2022-12-22.
Data through August 4, 2026.
Frequently asked questions about the weather in Helena
What is the hottest temperature ever recorded in Helena?
The highest temperature in this record for Helena is 39.4°C, measured on 2026-08-01. That is a recorded daily value from Helena's own series covering 1976 to 2025, not an estimate or a regional average.
What is the coldest temperature ever recorded in Helena?
The lowest temperature in this record for Helena is -42.2°C, measured on 2022-12-22. Together with the heat record above, that spans the full range this city has actually experienced across 1976 to 2025.
How much rain does Helena get a year?
Helena averages 519mm of precipitation a year, spread across roughly 108 days with at least 1mm. That average is taken over 50 complete calendar years, so one exceptionally wet or dry year does not set the figure.
What was the wettest day on record in Helena?
On 1985-08-02, 43.9mm fell on Helena, the highest single-day total in this series. For scale, that is roughly 8% of what the city receives in an average full year, in one day.
How many hours of sunshine does Helena get a year?
Helena averages 3652 sunshine hours a year, which works out to about 10.0 hours a day across the whole year. Sunshine hours measure the time direct sunlight actually reaches the ground, not simply how long it is light.
How warm are summers and how cold are winters in Helena?
Across the summer months Helena averages a daytime high near 25.4°C, while winter nights average -10.6°C. The seasons here are set from Helena's position relative to the equator rather than a fixed northern-hemisphere calendar.
What is the strongest wind recorded in Helena?
The strongest wind speed recorded in Helena is 58 km/h, on 2025-12-17. That is the daily maximum sustained wind rather than the peak gust, which typically runs higher still.
