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 is the warmest month, exhibiting average temperatures of 77.9°F (25.5°C) at the peak and 49.8°F (9.9°C) at the base.Humidity
In Rainier, the average relative humidity in August is 73%.Rainfall
The month with the least rainfall is August, when the rain falls for 6.3 days and typically collects 0.39" (10mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In August, the average length of the day is 14h and 5min.On the first day of the month, sunrise is at 5:55 am and sunset at 8:41 pm. On the last day of August, sunrise is at 6:32 am and sunset at 7:51 pm PDT.
Sunshine
August has the most sunshine of the year, with an average of 10.4h of sunshine.UV index
The average daily maximum UV index in August is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In August, the average maximum UV index of 4 translates into the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the hottest time of year?
What are the temperatures in August?
What is the average humidity in August?
What is the driest month?
How much does it rain in August?
When it does not snow in Rainier?
How many hours of daylight does Rainier have in August?
What time are sunrise and sunset in August?
What month has the most sunshine?
How long on average sun shines in August in Rainier?
How high is the UV index in August?
Average temperature in August
Rainier, OR
- Average high temperature in August: 77.9°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in August: 49.8°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.7°F).
Average pressure in August
Rainier, OR
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in August
Rainier, OR
- Average wind speed in August: 4mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in August
Rainier, OR
- Average humidity in August: 73%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is July (72%).
Average rainfall in August
Rainier, OR
- Average rainfall in August: 0.39"
The wettest month (with the highest rainfall) is January (3.9").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in August
Rainier, OR
- Average rainfall days in August: 6.3 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.1 days).
Average snowfall in August
Rainier, OR
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Rainier, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Rainier, OR
- 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 30min).
Average sunshine days in August
Rainier, OR
- Average sunshine days in August: 21.3 days
The month with the most sunshine days is July (22 days).
The month with the least sunshine days is March (8.9 days).
Average UV index in August
Rainier, OR
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in August
Rainier, OR
- Average cloud cover in August: 36
The months with the most cloud cover are February and March (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in August
Rainier, OR
- Average visibility in August: 5mi
The month with the highest visibility is August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (4mi).
Rainier, Oregon, USA
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