Climate of Sumas

Sumas has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for Sumas is 13° degrees and there is about 1170 mm of rain in a year. It is dry for 153 days a year with an average humidity of 81% and an UV-index of 3.

Climate averages for the whole year

Day: the average daily temperature during the day is between 4°C and 23°C
Night:the average nighttime temperature is between -1°C and 10°C
Rain: it rains 184 days and there is a total of approximately 1170 mm rainfall
Snow: it snows an average of 14 days per year
Sun hours: throughout the year there are 2533 sun hours

Maximum temperature:	between 4°C and 23°C
Warmest month:	23°C in July
Coldest month:	4°C in December
Night temperature:	between -1°C and 10°C
Dry days:	167 days
Days with rain:	184 days
Days with snow:	14 days
Total rain sum:	1170 mm
Hours of sunshine:	2533 hours

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

Temperature graph

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

Precipitation graph

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

Climate table of Sumas

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day temp. (°C)	5	6	8	12	17	19	23	23	19	13	7	4
Night temp. (°C)	0	0	2	3	5	8	10	10	9	6	2	-1
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	145	93	143	94	56	38	14	26	61	132	203	165
Days with rain	17	15	20	19	15	13	7	7	14	17	21	19
Days with snow	2	5	3	-	-	-	-	-	-	-	1	3
Dry days	12	8	8	11	16	17	24	24	16	14	8	9
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sun hours per day	4	4	6	8	9	9	11	11	9	5	4	4
Wind force (Bft)	2	2	2	2	2	2	2	1	1	2	2	2
UV-index	1	2	3	3	4	4	5	4	3	2	2	2

Best time to visit Sumas

The best time to visit Sumas in the state of Washington is from June through September. In this period you have a pleasant temperature and little precipitation. The highest average temperature in Sumas is 23°C in July and the lowest is 4°C in December.

Climate of Sumas by month

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