Summer temperatures · Montana
How hot does Helena get in summer?
Helena right now
45°FClear skies
- Today50°F / 34°FClouds
- Tomorrow55°F / 32°FClouds
- Monday51°F / 31°FClouds
Chilly. The sun's just for show.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, Helena averages highs around 82°F and lows around 52°F.
About 27 days a year reach 90°F or hotter, and about one reaches 100°F. About 75 days a year get to 80°F or warmer. That makes it the 13th coolest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 55°F.
Helena reaches 90°F on about 27 days a year, but the mountain nights fall to about 52°F, so summer here comes with a built-in cool-down.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 82°F |
|---|---|
| Average summer low | 52°F |
| Days a year at 80°F or warmer | 75 |
| Days a year at 90°F or hotter | 27 |
| Days a year at 100°F or hotter | 1 |
| Average winter high, for comparison | 34°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Cheyenne, Wyoming: highs around 81°F, lows around 53°F
- Binghamton, New York: highs around 76°F, lows around 57°F
- Casper, Wyoming: highs around 85°F, lows around 50°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00024144.