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
Custer's temperatures peak on average in August, reaching 70°F (21.1°C) at their highest and 54.9°F (12.7°C) at their lowest.Humidity
In August, the average relative humidity is 76%.Rainfall
In August, the rain falls for 6.1 days. Throughout August, 1.06" (27mm) of precipitation is accumulated. In Custer, during the entire year, the rain falls for 176.1 days and collects up to 43.78" (1112mm) of precipitation.Snowfall
In Custer, snow does not fall in May through October.Daylight
The average length of the day in August is 14h and 19min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:48 pm. On the last day of August, sunrise is at 6:27 am and sunset at 7:54 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.4h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In August, the maximum UV index of 4 transforms into these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the warmest month?
What are the temperatures in August?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
What is the average length of the day in August?
What time are sunrise and sunset in August?
What are the months with the most sunshine?
How long on average sun shines in August?
What is the UV index intensity in August?
Average temperature in August
Custer, WA
- Average high temperature in August: 70°F
The warmest month (with the highest average high temperature) is August (70°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in August: 54.9°F
The month with the highest average low temperature is August (54.9°F).
The coldest month (with the lowest average low temperature) is February (35.8°F).
Average pressure in August
Custer, WA
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in August
Custer, WA
- Average wind speed in August: 3.9mph
The windiest months (with the highest average wind speed) are November and December (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in August
Custer, WA
- Average humidity in August: 76%
The months with the highest relative humidity are January and November (83%).
The month with the lowest relative humidity is July (74%).
Average rainfall in August
Custer, WA
- Average rainfall in August: 1.06"
The wettest month (with the highest rainfall) is November (7.13").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in August
Custer, WA
- Average rainfall days in August: 6.1 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in August
Custer, WA
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Custer, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (3.7 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
Custer, WA
- Average daylight in August: 14h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in August: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in August
Custer, WA
- Average sunshine days in August: 23.2 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is November (8.8 days).
Average UV index in August
Custer, WA
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Custer, WA
- Average cloud cover in August: 26
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in August
Custer, WA
- 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).
Custer, Washington, USA
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