May weather forecastCuster, WA
May
Weather in May
The last month of the spring, May, is an enjoyable month in Custer, Washington, with an average temperature fluctuating between 61.7°F (16.5°C) and 46.6°F (8.1°C).Temperature
The shift from April to May introduces a subtle increase in the average high-temperature, moving from a fresh 54.1°F (12.3°C) to a comfortable 61.7°F (16.5°C). Throughout May, Custer witnesses a consistent average low-temperature of 46.6°F (8.1°C).Humidity
The average relative humidity in May is 76%.Rainfall
In Custer, in May, it is raining for 12.3 days, with typically 2.05" (52mm) of accumulated precipitation. 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
In Custer, the average length of the day in May is 15h and 19min.On the first day of May, sunrise is at 5:48 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 9:05 pm PDT.
Sunshine
The average sunshine in May in Custer is 9.3h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 during May leads to these advisories:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Custer, WA
- Average high temperature in May: 61.7°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 May: 46.6°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 May
Custer, WA
- Average pressure in May: 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 May
Custer, WA
- Average wind speed in May: 4.5mph
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 May
Custer, WA
- Average humidity in May: 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 May
Custer, WA
- Average rainfall in May: 2.05"
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 May
Custer, WA
- Average rainfall days in May: 12.3 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 May
Custer, WA
- Average snowfall in May: 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 May
Custer, WA
- Average snowfall days in May: 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 May /
Average sunshine in May
Custer, WA
- Average daylight in May: 15h and 18min
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 May: 9h and 18min
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 May
Custer, WA
- Average sunshine days in May: 16.4 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 May
Custer, WA
- Average UV index in May: 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 May
Custer, WA
- Average cloud cover in May: 40
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 May
Custer, WA
- Average visibility in May: 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).
