August weather forecastSteilacoom, WA
August
Weather in August
The last month of the summer, August, is also a moderately hot month in Steilacoom, Washington, with an average temperature ranging between max 78.1°F (25.6°C) and min 52.7°F (11.5°C).Temperature
August, marked by an average high-temperature of 78.1°F (25.6°C) and a low-temperature of 52.7°F (11.5°C), is the warmest month.Humidity
The average relative humidity in August is 70%.Rainfall
In Steilacoom, during August, the rain falls for 5 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 172.9 rainfall days, and 30.08" (764mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Steilacoom, the average length of the day in August is 14h and 10min.On the first day of the month, sunrise is at 5:50 am and sunset at 8:42 pm. On the last day of August, sunrise is at 6:29 am and sunset at 7:51 pm PDT.
Sunshine
With an average of 10.6h of sunshine, August has the most sunshine of the year in Steilacoom.UV index
In Steilacoom, the average daily maximum UV index in August is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during August leads to these advisories:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Steilacoom, WA
- Average high temperature in August: 78.1°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in August: 52.7°F
The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).
Average pressure in August
Steilacoom, WA
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in August
Steilacoom, WA
- Average wind speed in August: 3.7mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in August
Steilacoom, WA
- Average humidity in August: 70%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (68%).
Average rainfall in August
Steilacoom, WA
- Average rainfall in August: 0.55"
The wettest month (with the highest rainfall) is December (4.69").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in August
Steilacoom, WA
- Average rainfall days in August: 5 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (5 days).
Average snowfall in August
Steilacoom, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Steilacoom, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.2 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
Steilacoom, WA
- Average daylight in August: 14h and 12min
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 36min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in August
Steilacoom, WA
- Average sunshine days in August: 23.4 days
The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (9 days).
Average UV index in August
Steilacoom, 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
Steilacoom, WA
- Average cloud cover in August: 27
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
Steilacoom, WA
- Average visibility in August: 6mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).
