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, known for its average high temperature of 76.5°F (24.7°C) and an average low temperature of 47.8°F (8.8°C), is the warmest month.Humidity
July and August, with an average relative humidity of 72%, are the least humid months.Rainfall
In Saint Helens, in August, it is raining for 6 days, with typically 0.47" (12mm) of accumulated precipitation. Throughout the year, there are 149 rainfall days, and 19.37" (492mm) of precipitation is accumulated.Snowfall
In Saint Helens, snow does not fall in May through October.Daylight
In Saint Helens, the average length of the day in August is 14h and 4min.On the first day of August, sunrise is at 5:55 am and sunset at 8:39 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 7:50 pm PDT.
Sunshine
The month with the most sunshine is August, with an average of 10.4h of sunshine.UV index
In Saint Helens, the average daily maximum UV index in August is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 4 during August translates into the following directions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
What are August temperatures?
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 are sunrise and sunset in August?
What month has the most sunshine?
How many hours of sunshine does Saint Helens have in August?
What is the UV index intensity in August?
Average temperature in August
Saint Helens, OR
- Average high temperature in August: 76.5°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in August: 47.8°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).
Average pressure in August
Saint Helens, OR
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in August
Saint Helens, OR
- Average wind speed in August: 3.5mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in August
Saint Helens, OR
- Average humidity in August: 72%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in August
Saint Helens, OR
- Average rainfall in August: 0.47"
The wettest month (with the highest rainfall) is January (2.64").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in August
Saint Helens, OR
- Average rainfall days in August: 6 days
The month with the highest number of rainy days is March (16 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in August
Saint Helens, OR
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Saint Helens, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.6 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
Saint Helens, 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 42min).
Average sunshine days in August
Saint Helens, OR
- Average sunshine days in August: 23.2 days
The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is February (12.1 days).
Average UV index in August
Saint Helens, OR
- Average UV index in August: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in August
Saint Helens, OR
- Average cloud cover in August: 32
The month with the most cloud cover is March (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in August
Saint Helens, OR
- Average visibility in August: 5mi
The months with the highest visibility are July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, June, September, October, November and December (4mi).
Saint Helens, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location