August weather forecastHermiston, OR
August
Weather in August
The summer season persists in Hermiston, Oregon, in August with slightly vibrant, less harsh weather conditions compared to July. There's a slight decrease in temperature from its annual peak in the previous month, but summer heat still dominates. This month arguably presents the most balanced summer weather, providing an inviting atmosphere for tourism. It observes one of the lowest rainfall levels in the year, at 0.28" (7mm), nurturing a favorable environment for outdoor activities. Summer moments imbued with warm and dry conditions continue to shine brightly on August's Hermiston.Temperature
Hermiston's shift into August is marked by a subtle change to a still hot 87.1°F (30.6°C) from July's 88°F (31.1°C) in temperature. Throughout August, Hermiston acknowledges a distinct difference between its daytime highs and the steady low average of 64°F (17.8°C).Humidity
The months with the lowest humidity are July and August, with an average relative humidity of 36%.Rainfall
In Hermiston, in August, during 3.3 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, there are 109.3 rainfall days, and 8.11" (206mm) of precipitation is accumulated.Snowfall
April through August and October are months without snowfall.Daylight
In August, the average length of the day is 14h and 4min.On the first day of the month, sunrise is at 5:41 am and sunset at 8:25 pm. On the last day of August, sunrise is at 6:17 am and sunset at 7:36 pm PDT.
Sunshine
With an average of 12.1h of sunshine, August has the most sunshine of the year.UV index
In Hermiston, the average daily maximum UV index in August is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Hermiston, OR
- Average high temperature in August: 87.1°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is December (38.8°F).
- Average low temperature in August: 64°F
The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in August
Hermiston, OR
- Average pressure in August: 29.91"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in August
Hermiston, OR
- Average wind speed in August: 7.3mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is December (6.1mph).
Average humidity in August
Hermiston, OR
- Average humidity in August: 36%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in August
Hermiston, OR
- Average rainfall in August: 0.28"
The wettest months (with the highest rainfall) are March and December (1.06").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in August
Hermiston, OR
- Average rainfall days in August: 3.3 days
The month with the highest number of rainy days is March (14.5 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in August
Hermiston, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in August
Hermiston, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (3.7 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in August /
Average sunshine in August
Hermiston, OR
- Average daylight in August: 14h and 6min
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: 12h and 6min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in August
Hermiston, OR
- Average sunshine days in August: 25.2 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is February (13.3 days).
Average UV index in August
Hermiston, OR
- Average UV index in August: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Hermiston, OR
- Average cloud cover in August: 9
The months with the most cloud cover are January and December (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in August
Hermiston, OR
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
