August weather forecastRoy, WA
August
Weather in August
August, the last month of the summer in Roy, is another warm month, with temperature in the range of an average high of 78.4°F (25.8°C) and an average low of 52.2°F (11.2°C).Temperature
The warmest period tends to be August, when average temperatures fluctuate between a high of 78.4°F (25.8°C) and a low of 52.2°F (11.2°C).Humidity
In Roy, the average relative humidity in August is 71%.Rainfall
In August, the rain falls for 5.2 days. Throughout August, 0.51" (13mm) of precipitation is accumulated. Throughout the year, there are 174.2 rainfall days, and 31.06" (789mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
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
The month with the most sunshine in Roy is August, with an average of 10.6h of sunshine.UV index
In Roy, Washington, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 5 in August translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Roy, WA
- Average high temperature in August: 78.4°F
The warmest month (with the highest average high temperature) is August (78.4°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in August: 52.2°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is February (34°F).
Average pressure in August
Roy, 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
Roy, WA
- Average wind speed in August: 3.7mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in August
Roy, WA
- Average humidity in August: 71%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is July (69%).
Average rainfall in August
Roy, WA
- Average rainfall in August: 0.51"
The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in August
Roy, WA
- Average rainfall days in August: 5.2 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (5.2 days).
Average snowfall in August
Roy, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Roy, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (2.8 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
Roy, WA
- Average daylight in August: 14h and 12min
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 36min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in August
Roy, WA
- Average sunshine days in August: 22.9 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is November (9.1 days).
Average UV index in August
Roy, WA
- Average UV index in August: 5
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
Roy, WA
- Average cloud cover in August: 28
The months with the most cloud cover are January and December (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in August
Roy, WA
- 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 and December (4mi).
