Sumner (WA) Climate by Month
Sumner experiences great temperature shifts.
The city's weather can transition from warm days
to cold weather.
It also has a notably wet climate with much precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
The climate in Sumner is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures range from a comfortable 25°C in August, the warmest time of the year, to a chilly 8°C during cooler months like December. At night, temperatures typically average around 1°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Sumner has a notably wet climate with abundant precipitation, recording 1119 mm of rain/snowfall per year. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, November receives heavy rainfall, averaging 176 mm of precipitation, recorded across 21 rainy days. In contrast, the drier season, July brings less rainfall, with 18 mm over 6 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Sumner. While July receives considerable daily sunshine with up to 10.4 hours, November marks the darkest time of the year, where sunshine is scarce with only 2.0 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
The best time of year to visit Sumner in the United States of America
During the months of June, July, August and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Most rainfall (rainy season) is seen in January, November and December.
August has an average maximum temperature of 25°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 8°C.
November tops the wettest month list with 176 mm of rainfall.
July is the driest month with 18 mm of precipitation.
July is the sunniest month with an average of 312 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
