May weather forecastOnalaska, WA
May
Weather in May
May, the last month of the spring in Onalaska, is a refreshing month, with an average temperature varying between 40.3°F (4.6°C) and 63.5°F (17.5°C).Temperature
May's onset brings a minor rise in the average high-temperature, moving from a moderate 55.4°F (13°C) in April to a comfortable 63.5°F (17.5°C). In May, the temperature registers a significant dip to an average of 40.3°F (4.6°C) at night.Humidity
In May, the average relative humidity is 79%.Rainfall
In Onalaska, in May, during 13.6 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, in Onalaska, there are 170.1 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
In Onalaska, snow does not fall in April through October.Daylight
In Onalaska, Washington, the average length of the day in May is 15h and 2min.On the first day of May, sunrise is at 5:54 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:21 am and sunset at 8:56 pm PDT.
Sunshine
In Onalaska, the average sunshine in May is 7.8h.UV index
In May, the average daily maximum UV index in Onalaska, Washington, is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily maximum UV index of 4 in May interprets into the following advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Around midday, solar radiation is most harmful; hence, exposure should be limited. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Onalaska, WA
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in May: 40.3°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (32.4°F).
Average pressure in May
Onalaska, WA
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in May
Onalaska, WA
- Average wind speed in May: 3.9mph
The windiest month (with the highest average wind speed) is January (4.8mph).
The calmest months (with the lowest average wind speed) are August and September (3.5mph).
Average humidity in May
Onalaska, WA
- Average humidity in May: 79%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is July (73%).
Average rainfall in May
Onalaska, WA
- Average rainfall in May: 1.57"
The wettest month (with the highest rainfall) is January (3.54").
The driest months (with the least rainfall) are July and August (0.39").
Average rainfall days in May
Onalaska, WA
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is March (19.4 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in May
Onalaska, WA
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Onalaska, WA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (3.4 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
Onalaska, WA
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in May: 7h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 42min).
Average sunshine days in May
Onalaska, WA
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is August (22.1 days).
The month with the least sunshine days is February (9 days).
Average UV index in May
Onalaska, WA
- Average UV index in May: 4
The month with the highest UV index is 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
Onalaska, WA
- Average cloud cover in May: 55
The months with the most cloud cover are February and March (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in May
Onalaska, WA
- Average visibility in May: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
