What’s the climate like in Sumner?
The current climate of Sumner features average monthly temperatures ranging from highs of 26°C during the day to lows of 8°C. The average yearly temperature is around 17°C. At night, temperatures in the colder months average around 2°C and in the warmer months around 14°C.
The highest temperature recorded in Sumner in recent years was 42°C in June 2021. The lowest daytime temperature recorded was -5°C in December 2021.
On average, Sumner gets 1604 mm of precipitation each year. Of this, about 24 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Sumner?
The best time to visit Sumner for sunny weather is May through September. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Sumner. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Sumner
The climate table of Sumner shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 9 | 8 | 12 | 15 | 20 | 23 | 26 | 26 | 22 | 16 | 11 | 8 |
| Temp. min (°C) | 3 | 2 | 4 | 6 | 10 | 12 | 14 | 14 | 12 | 9 | 5 | 3 |
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| Precipitation (mm) | 203 | 270 | 108 | 154 | 39 | 49 | 8,1 | 31 | 70 | 173 | 151 | 347 |
| Snow (cm) | 0,7 | 8,8 | 1,0 | 0,6 | 0 | 0 | 0 | 0 | 0 | 0 | 1,2 | 11 |
| UV Index | 1 | 3 | 5 | 6 | 7 | 8 | 8 | 7 | 6 | 3 | 2 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 17°C
- Highest temperature: 26°C in July and August
- Lowest temperature: 8°C in February and December
- Precipitation*: 1604 mm per year, averaging 134 mm per month
- Snowfall: 24 cm per year
- Driest months: 8,1 mm in July, 31 mm in August and 39 mm in May
- Wettest months: 347 mm in December, 270 mm in February and 203 mm in January
*Precipitation is measured as a combination of rain, snow, and hail
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Table of Contents
Average Temperature per Month in Sumner
This graph shows the average maximum temperatures per month in Sumner, Washington. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Sumner
This graph shows how much precipitation Sumner, Washington, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Sumner
This graph shows how much snow Sumner, Washington, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Sumner
This graph shows the average UV index per month in Sumner, Washington. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Sumner
This graph shows the average yearly temperature in Sumner, Washington. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Sumner
This chart shows the total yearly precipitation in Sumner, Washington, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Sumner
This chart shows the total yearly snowfall in Sumner, Washington, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Sumner
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Average Weather in Sumner by Month
Click on a month below to see detailed weather info for Sumner. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
