Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May sees a rise in the average high-temperature, climbing from a fresh 53.2°F (11.8°C) in April to a refreshing 63.5°F (17.5°C). Riverside demonstrates a significant disparity from daytime highs throughout the month of May, with an average nighttime temperature of 41.9°F (5.5°C).Humidity
The average relative humidity in May is 51%.Rainfall
In Riverside, during May, the rain falls for 12.6 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Riverside, during the entire year, the rain falls for 109.9 days and collects up to 11.34" (288mm) of precipitation.Snowfall
Months with snowfall in Riverside are January through May, November and December. May is the last month it regularly snows in Riverside. 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
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 medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 4 during May leads to these advisories:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What is the temperature in May in Riverside?
What is the average humidity in May in Riverside?
How much does it rain in Riverside in May?
What is the last month it snows in Riverside?
What is the average length of the day in May in Riverside?
When are sunrise and sunset in May in Riverside?
How long on average sun shines in May in Riverside?
What is the UV index reading in May in Riverside?
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 4min
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).
Riverside, Oregon, USA
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