May weather forecastRiverside, OR
May
Weather in May
May, the last month of the spring in Riverside, is a refreshing month, with an average temperature varying between 41.9°F (5.5°C) and 63.5°F (17.5°C).Temperature
Riverside's weather shows a temperature rise with the arrival of May, moving from a fresh 53.2°F (11.8°C) in April to a comfortable 63.5°F (17.5°C). In Riverside, a significant divergence from daytime highs is recorded, with average lows of 41.9°F (5.5°C) during May nights.Humidity
In May, the average relative humidity is 51%.Rainfall
In May, the rain falls for 12.6 days. Throughout May, 1.26" (32mm) of precipitation is accumulated. In Riverside, Oregon, during the entire year, the rain falls for 109.9 days and collects up to 11.34" (288mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Riverside aggregates 0.04" (1mm) of snow. In Riverside, during the entire year, snow falls for 46.8 days and aggregates up to 25.75" (654mm) of snow.Daylight
In Riverside, the average length of the day in May is 14h and 44min.On the first day of the month, sunrise is at 6:43 am and sunset at 8:55 pm. On the last day of May, sunrise is at 6:14 am and sunset at 9:26 pm MDT.
Sunshine
In May, the average sunshine is 11h.UV index
In Riverside, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 4 in May suggests the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. It's recommended to limit sun exposure when its radiation is at its peak during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Riverside, OR
- Average high temperature in May: 63.5°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.8°F).
- Average low temperature in May: 41.9°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in May
Riverside, OR
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in May
Riverside, OR
- Average wind speed in May: 7.3mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is January (5mph).
Average humidity in May
Riverside, OR
- Average humidity in May: 51%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in May
Riverside, OR
- Average rainfall in May: 1.26"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in May
Riverside, OR
- Average rainfall days in May: 12.6 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.4 days).
Average snowfall in May
Riverside, OR
- Average snowfall in May: 0.04"
The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Riverside, OR
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is December (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Riverside, OR
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in May
Riverside, OR
- Average sunshine days in May: 16.6 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in May
Riverside, OR
- Average UV index in May: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Riverside, OR
- Average cloud cover in May: 26
The months with the most cloud cover are January and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in May
Riverside, OR
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
