May weather forecastOroville, WA
May
Weather in May
The last month of the spring, May, is a refreshing month in Oroville, Washington, with temperature in the range of an average low of 37.8°F (3.2°C) and an average high of 62.6°F (17°C).Temperature
The start of May signals an increase in the average high-temperature, moving from a frosty 49.6°F (9.8°C) in April to a comfortable 62.6°F (17°C). A sharp divergence from daytime highs is noted during the month of May, with the average nighttime temperature settling at a cold 37.8°F (3.2°C).Humidity
The average relative humidity in May is 63%.Rainfall
May is the month with the most rainfall. Rain falls for 13.8 days and accumulates 1.97" (50mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Oroville aggregates 0.79" (20mm) of snow. In Oroville, during the entire year, snow falls for 89.6 days and aggregates up to 47.44" (1205mm) of snow.Daylight
In Oroville, the average length of the day in May is 15h and 19min.On the first day of May, sunrise is at 5:35 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 4:58 am and sunset at 8:52 pm PDT.
Sunshine
In May, the average sunshine is 10.8h.UV index
In Oroville, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Oroville, WA
- Average high temperature in May: 62.6°F
The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in May: 37.8°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in May
Oroville, WA
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in May
Oroville, WA
- Average wind speed in May: 4.2mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest months (with the lowest average wind speed) are January, February and December (3.7mph).
Average humidity in May
Oroville, WA
- Average humidity in May: 63%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (49%).
Average rainfall in May
Oroville, WA
- Average rainfall in May: 1.97"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is August (0.47").
Average rainfall days in May
Oroville, WA
- Average rainfall days in May: 13.8 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (5.7 days).
Average snowfall in May
Oroville, WA
- Average snowfall in May: 0.79"
The month with the highest snowfall is December (9.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Oroville, WA
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Oroville, 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: 10h and 48min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Oroville, WA
- Average sunshine days in May: 15.1 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in May
Oroville, WA
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Oroville, WA
- Average cloud cover in May: 32
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in May
Oroville, WA
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
