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Hourly Forecast
Daylight Hours
07:13
Sunrise
19:32
Sunset
Moon
Waxing Crescent
12:31
Moonrise
20:48
Moonset
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Weather in Helena today, September 15, 2026
Expect a muted, overcast feel in Helena on September 15, 2026 as cloud persists. Brighter breaks, if they arrive, should stay brief. Morning skies stay relatively clear, holding cloud close to 30% near 11:00. The early part of the day favours being outside.
The temperature range runs from about 4°C up to 21°C. Moisture in the air spans 22%-63%, with the highest values around 10:00. Airflow remains manageable, reaching about 3.4 km/h around 23:00.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 19:00. Outdoor plans may still want a flexible backup. Visibility stays near 16.1 km. Daylight runs from 07:13 to 19:32, lasting 12 hours 18 minutes of sunlight today.
Taken together, overcast skies in Helena on September 15, 2026 favour indoor or covered options, with temperatures near 21°C.
Frequently asked questions about weather in Helena
How warm does it get in Helena?
The warmest month in Helena is July, with average high temperatures of 28°C. The average temperature during this period is around 19°C.
How cold does it get in Helena?
The coldest month in Helena is February, with average low temperatures of -11°C. The average temperature during this period is around -7°C.
What is the wettest time of year in Helena?
The wettest month in Helena is May, with an average of 86mm of precipitation.
What is the driest time of year in Helena?
The driest month in Helena is January, with an average of 26mm of precipitation.
