Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The shift to August signals an average high-temperature of a still tropical 87.1°F (30.6°C), subtly varied from July's 88°F (31.1°C). Despite higher daytime temperatures, nighttime averages fall to an enjoyable 64°F (17.8°C) in August.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, in Hermiston, 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
The average length of the day in August 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
The month with the most sunshine is August, with an average of 12.1h of sunshine.UV index
In Hermiston, the average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 6 in August transforms into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is August?
What are the least humid months?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
Does it snow in August?
How many hours of daylight does Hermiston have in August?
When are sunrise and sunset in August?
What month has the most sunshine?
How long on average sun shines in August?
What is the UV index intensity in August?
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 1min
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 1min
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).
Hermiston, Oregon, USA
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