May weather forecastOkanogan, WA
May
Weather in May
The last month of the spring, May, is a comfortable month in Okanogan, Washington, with an average temperature ranging between max 66°F (18.9°C) and min 42.4°F (5.8°C).Temperature
The shift from April to May is marked by an increase in the average high-temperature, moving from a cool 54.3°F (12.4°C) to a refreshing 66°F (18.9°C). A significant drop from the day's peak to an average low-temperature of 42.4°F (5.8°C) is noted during the nights in May.Humidity
In May, the average relative humidity in Okanogan, Washington, is 56%.Rainfall
In Okanogan, during May, the rain falls for 8.6 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, there are 90.2 rainfall days, and 7.56" (192mm) of precipitation is accumulated.Snowfall
In Okanogan, snow does not fall in May through October.Daylight
The average length of the day in May is 15h and 15min.On the first day of May in Okanogan, Washington, sunrise is at 5:37 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:01 am and sunset at 8:50 pm PDT.
Sunshine
The average sunshine in May is 11.2h.UV index
In May, the average daily maximum UV index in Okanogan is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 4 during May translates into the following guidance:
Be vigilant - Preventing sunburn is recommended. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Okanogan, WA
- Average high temperature in May: 66°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (30.4°F).
- Average low temperature in May: 42.4°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (18.1°F).
Average pressure in May
Okanogan, WA
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in May
Okanogan, WA
- Average wind speed in May: 4.8mph
The windiest month (with the highest average wind speed) is April (5.1mph).
The calmest month (with the lowest average wind speed) is January (4mph).
Average humidity in May
Okanogan, WA
- Average humidity in May: 56%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are July and August (42%).
Average rainfall in May
Okanogan, WA
- Average rainfall in May: 0.91"
The wettest month (with the highest rainfall) is December (0.94").
The driest months (with the least rainfall) are July and August (0.2").
Average rainfall days in May
Okanogan, WA
- Average rainfall days in May: 8.6 days
The month with the highest number of rainy days is March (11.5 days).
The month with the least rainy days is August (2.8 days).
Average snowfall in May
Okanogan, WA
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.39").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Okanogan, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is December (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Okanogan, WA
- Average daylight in May: 15h and 12min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 11h and 12min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in May
Okanogan, WA
- Average sunshine days in May: 21.3 days
The month with the most sunshine days is August (26.3 days).
The month with the least sunshine days is November (15.4 days).
Average UV index in May
Okanogan, WA
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in May
Okanogan, WA
- Average cloud cover in May: 25
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in May
Okanogan, WA
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
