Helena climate

Typical historical weather for Helena, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Helena.

Annual average

18°C

across all months

Warmest month

32.3°C

Jul average high

Coolest month

1.8°C

Jan average low

Annual rainfall

1416mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

37.7°C

19 August 2025

Coldest day

-21.3°C

17 January 2024

Wettest day

102.3mm

23 June 2017

Windiest day

8.2m/s

19 March 2025