Climate of Hermiston

Hermiston has a semi-arid climate. It hardly rains here. The average annual temperature for Hermiston is 17° degrees and there is about 199 mm of rain in a year. It is dry for 225 days a year with an average humidity of 58% and an UV-index of 4.

Climate averages for the whole year

Day: the average daily temperature during the day is between 3°C and 31°C
Night:the average nighttime temperature is between -2°C and 18°C
Rain: it rains 110 days and there is a total of approximately 197 mm rainfall
Snow: it snows an average of 12 days per year
Sun hours: throughout the year there are 3226 sun hours

Maximum temperature:	between 3°C and 31°C
Warmest month:	31°C in July
Coldest month:	3°C in December
Night temperature:	between -2°C and 18°C
Dry days:	243 days
Days with rain:	110 days
Days with snow:	12 days
Total rain sum:	197 mm
Hours of sunshine:	3226 hours

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

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Temperature graph

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

Precipitation graph

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

Climate table of Hermiston

In this climate table you can see at a glance what the average weather per month is for Hermiston. 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 Hermiston might be like in a given month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day temp. (°C)	4	7	12	16	22	26	31	30	25	17	9	3
Night temp. (°C)	-2	0	3	6	10	13	17	18	14	8	3	-2
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	24	27	26	15	12	13	4	6	6	18	18	28
Days with rain	11	11	15	11	9	7	3	3	4	11	12	13
Days with snow	2	4	1	-	-	-	-	-	-	-	1	4
Dry days	18	13	15	19	22	23	28	28	26	20	17	14
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sun hours per day	5	5	8	11	11	12	12	12	11	7	6	5
Wind force (Bft)	2	2	3	3	3	3	3	2	2	2	3	2
UV-index	2	2	3	4	5	6	7	5	5	4	2	2

Best time to visit Hermiston

The best time to visit Hermiston in the state of Oregon is from May through September. In this period you have a warm temperature and almost no precipitation. The highest average temperature in Hermiston is 31°C in July and the lowest is 3°C in December.

Climate of Hermiston by month

What is the average climate in a given month for Hermiston? 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