Best year time to visit Helena (historical)

General weather information about Helena (historical)

Average annual temperature is 13.0 °C

Absolute maximum temperature: 37.9 °C

Absolute minimum temperature: -17.0 °C

Number of sunny days: 227 days

Number of rainy days: 124 days

Number of snow days: 14 days

* Weather data for Helena (historical) United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	11.2	15.5	23.7	30.1	31.9	34.1	36.8	37.9	35.7	32.7	22.7	16.6
Average daytime temperature (°C)	3.5	7.7	10.2	20.2	26.5	30.2	29.6	30.7	28.7	19.8	12.8	7.6
Average temperature (°C)	-1.0	0.5	3.7	12.6	19.7	24.0	24.4	24.9	22.5	14.4	7.0	3.0
Average night temperature (°C)	-4.5	-4.2	-0.9	6.4	13.7	18.1	19.9	20.4	17.1	9.7	2.3	-0.6
Absolute minimum temperature (°C)	-15.6	-17.0	-10.1	-4.3	4.1	10.9	13.5	13.6	10.8	-4.9	-5.8	-5.0

The best time to visit Helena (historical) during the most sunny months:

The largest precipitation sum in Helena (historical) is at

June — 82(mm)

July — 83(mm)

December — 65(mm)

When is the best time to visit Helena (historical)?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Helena (historical).

What is the weather like in Helena (historical)?

See average temperature, rainfall and daylight hours for Helena (historical) by month in the table above.

How many sunny days does Helena (historical) have?

The monthly weather statistics above show sunshine and rainfall patterns for Helena (historical) throughout the year.