May weather forecastChinook, WA
May
Weather in May
The last month of the spring, May, is a moderate month in Chinook, Washington, with an average temperature ranging between max 55.9°F (13.3°C) and min 48.7°F (9.3°C).Temperature
As Chinook transitions from April to May, the average high-temperatures adjust to a moderate 55.9°F (13.3°C), nearly the same as the previous 51.8°F (11°C). The temperature during May sees a subtle transition from day to night, averaging a low of 48.7°F (9.3°C).Humidity
In May, the average relative humidity in Chinook is 81%.Rainfall
In May, in Chinook, the rain falls for 11.1 days. Throughout May, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 165.1 rainfall days, and 19.92" (506mm) of precipitation is accumulated.Snowfall
March through August, October through December are months without snowfall.Daylight
In May, the average length of the day is 15h and 1min.On the first day of May, sunrise is at 6:00 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:27 am and sunset at 8:59 pm PDT.
Sunshine
In May, the average sunshine is 8.2h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Chinook, WA
- Average high temperature in May: 55.9°F
The warmest month (with the highest average high temperature) is August (63.9°F).
The month with the lowest average high temperature is December (46.8°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (41.5°F).
Average pressure in May
Chinook, WA
- Average pressure in May: 30.06"Hg
The month with the highest atmospheric pressure is July (30.08"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in May
Chinook, WA
- Average wind speed in May: 8.5mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in May
Chinook, WA
- Average humidity in May: 81%
The month with the highest relative humidity is August (86%).
The month with the lowest relative humidity is April (80%).
Average rainfall in May
Chinook, WA
- Average rainfall in May: 0.79"
The wettest month (with the highest rainfall) is December (3.31").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in May
Chinook, WA
- Average rainfall days in May: 11.1 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is August (6.7 days).
Average snowfall in May
Chinook, WA
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are March, April, May, June, July, August, October, November and December (0").
Average snowfall days in May
Chinook, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in May /
Average sunshine in May
Chinook, WA
- Average daylight in May: 15h and 0min
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 May: 8h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Chinook, WA
- Average sunshine days in May: 16.7 days
The month with the most sunshine days is August (20.3 days).
The month with the least sunshine days is November (8.9 days).
Average UV index in May
Chinook, WA
- Average UV index in May: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in May
Chinook, WA
- Average cloud cover in May: 48
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility in May
Chinook, 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).
