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
Umatilla starts August with an average high-temperature of a still tropical 87.8°F (31°C), hinting at a minimal fluctuation from July. Umatilla records a marked divergence from the day's high temperatures, with nights in August averaging at an enjoyable 64.2°F (17.9°C).Humidity
July and August, with an average relative humidity of 36%, are the least humid months.Rainfall
In Umatilla, Oregon, in August, it is raining for 4.1 days, with typically 0.28" (7mm) of accumulated precipitation. In Umatilla, during the entire year, the rain falls for 106.1 days and collects up to 7.76" (197mm) of precipitation.Snowfall
In Umatilla, snow does not fall in April through August and October.Daylight
In Umatilla, Oregon, the average length of the day in August is 14h and 5min.On the first day of the month, sunrise is at 5:41 am and sunset at 8:26 pm. On the last day of August, sunrise is at 6:18 am and sunset at 7:36 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 12h of sunshine.UV index
In August, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 6 during August translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
Is it hot in Umatilla during August?
What is the least humid month in Umatilla?
What is the average humidity in August in Umatilla?
How many days does it rain in August in Umatilla?
When it does not snow in Umatilla?
Does it snow in Umatilla in August?
What is the average length of the day in August in Umatilla?
When is the sunrise / sunset in August in Umatilla?
What are the months with the most sunshine in Umatilla?
How many hours of sunshine does Umatilla have in August?
What is the UV index intensity in August in Umatilla?
Average temperature in August
Umatilla, OR
- Average high temperature in August: 87.8°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (38.7°F).
- Average low temperature in August: 64.2°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in August
Umatilla, 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
Umatilla, OR
- Average wind speed in August: 7.2mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is December (6.2mph).
Average humidity in August
Umatilla, 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
Umatilla, OR
- Average rainfall in August: 0.28"
The wettest month (with the highest rainfall) is March (1.02").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in August
Umatilla, OR
- Average rainfall days in August: 4.1 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is July (3.8 days).
Average snowfall in August
Umatilla, OR
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in August
Umatilla, OR
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (3.2 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
Umatilla, 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 0min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in August
Umatilla, OR
- Average sunshine days in August: 24.5 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14 days).
Average UV index in August
Umatilla, 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
Umatilla, OR
- Average cloud cover in August: 10
The months with the most cloud cover are January and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in August
Umatilla, 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).
Umatilla, Oregon, USA
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