August weather forecastGrand Mound, WA
August
Weather in August
The last month of the summer, August, is another warm month in Grand Mound, Washington, with an average temperature varying between 77.4°F (25.2°C) and 49.8°F (9.9°C).Temperature
Grand Mound records the warmest temperatures in August, averaging a high of 77.4°F (25.2°C) and a low of 49.8°F (9.9°C).Humidity
In August, the average relative humidity is 74%.Rainfall
In Grand Mound, in August, it is raining for 5.6 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 168 rainfall days, and 23.94" (608mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in August is 14h and 8min.On the first day of the month, sunrise is at 5:53 am and sunset at 8:43 pm. On the last day of August, sunrise is at 6:31 am and sunset at 7:52 pm PDT.
Sunshine
With an average of 10.1h of sunshine, August has the most sunshine of the year.UV index
The average daily maximum UV index in August is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 4 during August translates into the following guidance:
Prioritize safety - Recommendations to avert sunburn are shared. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Grand Mound, WA
- Average high temperature in August: 77.4°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (42.6°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 (33.1°F).
Average pressure in August
Grand Mound, WA
- Average pressure in August: 30.02"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 (30.02"Hg).
Average wind speed in August
Grand Mound, WA
- Average wind speed in August: 3.8mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity in August
Grand Mound, WA
- Average humidity in August: 74%
The month with the highest relative humidity is November (90%).
The month with the lowest relative humidity is July (73%).
Average rainfall in August
Grand Mound, WA
- Average rainfall in August: 0.39"
The wettest month (with the highest rainfall) is January (3.86").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in August
Grand Mound, WA
- Average rainfall days in August: 5.6 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (5.6 days).
Average snowfall in August
Grand Mound, WA
- 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
Grand Mound, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.7 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
Grand Mound, WA
- Average daylight in August: 14h and 6min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in August: 10h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in August
Grand Mound, WA
- Average sunshine days in August: 20.9 days
The month with the most sunshine days is August (20.9 days).
The months with the least sunshine days are February and March (9.3 days).
Average UV index in August
Grand Mound, WA
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Grand Mound, WA
- Average cloud cover in August: 38
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 38).
Average visibility in August
Grand Mound, WA
- Average visibility in August: 4mi
The month with the highest visibility is July (5mi).
The months with the lowest visibility are January, February, March, April, May, June, August, September, October, November and December (4mi).
