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
August temperatures tend to peak at an average high of 79.3°F (26.3°C) and dip to a low of 52°F (11.1°C).Humidity
August is the least humid month in Heisson, with an average relative humidity of 67%.Rainfall
In August, the rain falls for 5.1 days. Throughout August, 0.47" (12mm) of precipitation is accumulated. In Heisson, during the entire year, the rain falls for 177.9 days and collects up to 40.67" (1033mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Heisson, the average length of the day in August is 14h and 4min.On the first day of August, sunrise is at 5:54 am and sunset at 8:38 pm. On the last day of the month, sunrise is at 6:30 am and sunset at 7:49 pm PDT.
Sunshine
August has the most sunshine of the year, with an average of 10.8h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 during August translates into the following directions:
Put precautions into practice - Guidance to elude sunburn is provided. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
What are the temperatures in Heisson in August?
What is the least humid month?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the average length of the day in August?
When is the sunrise / sunset in August in Heisson?
What month has the most sunshine?
How many hours of sunshine does Heisson have in August?
How high is the UV index in August?
Average temperature in August
Heisson, WA
- Average high temperature in August: 79.3°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in August: 52°F
The month with the highest average low temperature is August (52°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure in August
Heisson, WA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in August
Heisson, WA
- Average wind speed in August: 3.8mph
The windiest month (with the highest average wind speed) is January (6.1mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in August
Heisson, WA
- Average humidity in August: 67%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is August (67%).
Average rainfall in August
Heisson, WA
- Average rainfall in August: 0.47"
The wettest month (with the highest rainfall) is January (6.06").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in August
Heisson, WA
- Average rainfall days in August: 5.1 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in August
Heisson, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Heisson, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.7 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
Heisson, WA
- Average daylight in August: 14h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in August: 10h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in August
Heisson, WA
- Average sunshine days in August: 23.8 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in August
Heisson, WA
- Average UV index in August: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Heisson, WA
- Average cloud cover in August: 26
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in August
Heisson, WA
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Heisson, Washington, USA
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