August weather forecastRiverside, OR
August
Weather in August
August, the last month of the summer in Riverside, is also a moderately hot month, with an average temperature ranging between max 83.5°F (28.6°C) and min 59°F (15°C).Temperature
The dawn of August sees an average high-temperature of a still moderately hot 83.5°F (28.6°C), subtly contrasting with July's 85.3°F (29.6°C). In Riverside, the August nights descend to a significantly cooler average of 59°F (15°C) compared to daytime highs.Humidity
The months with the lowest humidity are July and August, with an average relative humidity of 31%.Rainfall
In Riverside, during August, the rain falls for 3.8 days and regularly aggregates up to 0.2" (5mm) of precipitation. Throughout the year, there are 109.9 rainfall days, and 11.34" (288mm) of precipitation is accumulated.Snowfall
June through October are months without snowfall.Daylight
The average length of the day in August is 13h and 55min.On the first day of August, sunrise is at 6:43 am and sunset at 9:14 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 8:29 pm MDT.
Sunshine
In August, the average sunshine is 11h.UV index
In August, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In August, the average maximum UV index of 5 translates into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Riverside, OR
- Average high temperature in August: 83.5°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.8°F).
- Average low temperature in August: 59°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in August
Riverside, OR
- Average pressure in August: 29.93"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in August
Riverside, OR
- Average wind speed in August: 6.6mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is January (5mph).
Average humidity in August
Riverside, OR
- Average humidity in August: 31%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in August
Riverside, OR
- Average rainfall in August: 0.2"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in August
Riverside, OR
- Average rainfall days in August: 3.8 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.4 days).
Average snowfall in August
Riverside, OR
- Average snowfall in August: 0"
The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in August
Riverside, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Riverside, OR
- Average daylight in August: 13h and 54min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in August: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in August
Riverside, OR
- Average sunshine days in August: 23.6 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in August
Riverside, OR
- Average UV index in August: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in August
Riverside, OR
- Average cloud cover in August: 9
The months with the most cloud cover are January and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in August
Riverside, OR
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
