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
The warmest temperatures occur during August, when averages reach a peak of 79.3°F (26.3°C) and a low of 53.2°F (11.8°C).Humidity
The least humid month in Forest Grove is August, with an average relative humidity of 69%.Rainfall
July and August are months with the least rain when the rain falls for 6.2 days and typically aggregates up to 0.47" (12mm) of rain.Snowfall
In Forest Grove, snow does not fall in April through October.Daylight
The average length of the day in August is 14h and 3min.On the first day of the month, sunrise is at 5:57 am and sunset at 8:40 pm. On the last day of August, sunrise is at 6:33 am and sunset at 7:51 pm PDT.
Sunshine
The month with the most sunshine is August, with an average of 10.4h of sunshine.UV index
In Forest Grove, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 4 during August translates into the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. 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 part of the year is the hottest?
What is the temperature in August?
What is the least humid month?
What is the average humidity in August?
What is the driest month?
How many days does it rain in August?
When it does not snow in Forest Grove?
What is the average length of the day in August?
When are sunrise and sunset in August?
What month has the most sunshine?
How long on average sun shines in August?
What is the UV index reading in August?
Average temperature in August
Forest Grove, OR
- 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 (43°F).
- Average low temperature in August: 53.2°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in August
Forest Grove, 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
Forest Grove, OR
- Average wind speed in August: 4mph
The windiest month (with the highest average wind speed) is March (4.9mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in August
Forest Grove, OR
- Average humidity in August: 69%
The months with the highest relative humidity are February and December (88%).
The month with the lowest relative humidity is August (69%).
Average rainfall in August
Forest Grove, OR
- Average rainfall in August: 0.47"
The wettest month (with the highest rainfall) is January (5.47").
The driest months (with the least rainfall) are July and August (0.47").
Average rainfall days in August
Forest Grove, OR
- Average rainfall days in August: 6.2 days
The month with the highest number of rainy days is March (21.4 days).
The month with the least rainy days is August (6.2 days).
Average snowfall in August
Forest Grove, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.54").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Forest Grove, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.9 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
Forest Grove, OR
- Average daylight in August: 14h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- 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 and February (Average sunshine: 3h and 30min).
Average sunshine days in August
Forest Grove, OR
- 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 March (7.6 days).
Average UV index in August
Forest Grove, 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
Forest Grove, OR
- Average cloud cover in August: 28
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in August
Forest Grove, OR
- 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, March, November and December (4mi).
Forest Grove, Oregon, USA
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