Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
With average high temperatures of 75.7°F (24.3°C) and lows of 50.9°F (10.5°C), August is the warmest month.Humidity
July and August, with an average relative humidity of 70%, are the least humid months in Sumner.Rainfall
In Sumner, in August, during 6.8 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, in Sumner, Washington, there are 185 rainfall days, and 35.71" (907mm) of precipitation is accumulated.Snowfall
In Sumner, Washington, snow does not fall in May through October.Daylight
In August, the average length of the day is 14h and 10min.On the first day of August in Sumner, sunrise is at 5:48 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:50 pm PDT.
Sunshine
The month with the most sunshine is August, with an average of 10.9h of sunshine.UV index
In Sumner, the average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index, 4 during August, leads to the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What part of the year is the hottest in Sumner?
What is the usual temperature for Sumner in August?
What are the least humid months in Sumner?
What is the average humidity in August in Sumner?
How much does it rain in Sumner in August?
When it does not snow in Sumner?
How many hours of daylight does Sumner have in August?
What time are sunrise and sunset in August in Sumner?
What month has the most sunshine in Sumner?
How long on average sun shines in August in Sumner?
What is the UV index reading in August in Sumner?
Average temperature in August
Sumner, WA
- Average high temperature in August: 75.7°F
The warmest month (with the highest average high temperature) is August (75.7°F).
The month with the lowest average high temperature is December (41.4°F).
- Average low temperature in August: 50.9°F
The month with the highest average low temperature is August (50.9°F).
The coldest month (with the lowest average low temperature) is December (32°F).
Average pressure in August
Sumner, WA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in August
Sumner, WA
- Average wind speed in August: 3.5mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in August
Sumner, WA
- Average humidity in August: 70%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in August
Sumner, WA
- Average rainfall in August: 0.71"
The wettest month (with the highest rainfall) is December (5.35").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in August
Sumner, WA
- Average rainfall days in August: 6.8 days
The month with the highest number of rainy days is March (20.7 days).
The month with the least rainy days is August (6.8 days).
Average snowfall in August
Sumner, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (3.31").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Sumner, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Sumner, WA
- Average daylight in August: 14h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in August: 10h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days in August
Sumner, WA
- Average sunshine days in August: 22 days
The month with the most sunshine days is August (22 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in August
Sumner, WA
- Average UV index in August: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in August
Sumner, WA
- Average cloud cover in August: 25
The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in August
Sumner, WA
- Average visibility in August: 6mi
The months with the highest visibility are July and August (6mi).
The months with the lowest visibility are January, February and December (4mi).
Sumner, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
