Climate of Helena

Helena has a continental climate. It is warm in the summer and cold in the winter. The average annual temperature for Helena is 11° degrees and there is about 266 mm of rain in a year. It is dry for 184 days a year with an average humidity of 67% and an UV-index of 3.

Climate averages for the whole year

Day: the average daily temperature during the day is between -3°C and 27°C
Night:the average nighttime temperature is between -10°C and 10°C
Rain: it rains 117 days and there is a total of approximately 269 mm rainfall
Snow: it snows an average of 80 days per year
Sun hours: throughout the year there are 3154 sun hours

Maximum temperature:	between -3°C and 27°C
Warmest month:	27°C in July
Coldest month:	-3°C in December
Night temperature:	between -10°C and 10°C
Dry days:	168 days
Days with rain:	117 days
Days with snow:	80 days
Total rain sum:	269 mm
Hours of sunshine:	3154 hours

Climate of Helena
Temperature graph
Precipitation graph
Climate chart of Helena
The best travel time for Helena
Climate of Helena by month
Experiences with the weather of Helena

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Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Helena.

Precipitation graph

This graph shows the average amount of rainfall per month for Helena.

Climate table of Helena

In this climate table you can see at a glance what the average weather per month is for Helena. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Helena might be like in a given month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day temp. (°C)	-1	-2	4	9	15	21	27	26	21	12	3	-3
Night temp. (°C)	-9	-10	-5	-2	3	7	10	10	7	1	-5	-10
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	17	21	27	34	33	40	13	16	16	18	17	17
Days with rain	8	7	13	14	15	12	7	8	7	10	7	9
Days with snow	14	16	11	9	1	-	-	-	1	4	9	15
Dry days	9	5	7	7	15	18	24	23	22	17	14	7
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sun hours per day	6	6	8	10	11	11	12	12	10	7	6	6
Wind force (Bft)	3	2	2	2	2	2	2	2	2	2	3	3
UV-index	2	1	2	2	4	5	6	5	3	2	2	2

Best time to visit Helena

The best time to visit Helena in the state of Montana is from June through September. In this period you have a warm temperature and almost no precipitation. The highest average temperature in Helena is 27°C in July and the lowest is -3°C in December.

Climate of Helena by month

What is the average climate in a given month for Helena? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

January