May weather forecastRiverton, UT
May
Weather in May
May heralds the beginning of the long-awaited summer season in Riverton, with an increase in temperatures and sunshine hours. Pleasant weather marks this month, with temperatures escalating to 63.7°F (17.6°C), a notable rise from the preceding lower temperatures. Outdoor activities are prolific during May, courtesy of the lengthier hours of sunshine and decreased rainfall. Mild winds render even hotter days quite comfortable. The steady ascent of temperatures signals the advent of an even warmer June.Temperature
The beginning of May in Riverton signals a rise in the average high-temperature, moving from a cool 52.7°F (11.5°C) in April to a comfortable 63.7°F (17.6°C). Riverton documents a marked decrease from day to night, with an average low of 41°F (5°C) throughout May.Humidity
In May, the average relative humidity in Riverton is 51%.Rainfall
In Riverton, Utah, during May, the rain falls for 6.5 days and regularly aggregates up to 0.51" (13mm) of precipitation. Throughout the year, in Riverton, there are 69.6 rainfall days, and 9.06" (230mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall in Riverton.Daylight
In Riverton, the average length of the day in May is 14h and 27min.On the first day of the month, sunrise is at 6:25 am and sunset at 8:24 pm. On the last day of May, in Riverton, sunrise is at 5:59 am and sunset at 8:51 pm MDT.
Sunshine
In May, the average sunshine is 11.2h.UV index
In May, the average daily maximum UV index in Riverton is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 during May leads to these advisories:
Make use of precautions - It is urged to ward off sun damage. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Riverton, UT
- Average high temperature in May: 63.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in May: 41°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in May
Riverton, UT
- Average pressure in May: 29.89"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Riverton, UT
- Average wind speed in May: 5.6mph
The windiest months (with the highest average wind speed) are March and April (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.9mph).
Average humidity in May
Riverton, UT
- Average humidity in May: 51%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is July (37%).
Average rainfall in May
Riverton, UT
- Average rainfall in May: 0.51"
The wettest month (with the highest rainfall) is February (1.38").
The driest month (with the least rainfall) is June (0.31").
Average rainfall days in May
Riverton, UT
- Average rainfall days in May: 6.5 days
The month with the highest number of rainy days is April (8.3 days).
The month with the least rainy days is June (4.1 days).
Average snowfall in May
Riverton, UT
- Average snowfall in May: 0"
The month with the highest snowfall is January (8.27").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Riverton, UT
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Riverton, UT
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 11h and 12min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in May
Riverton, UT
- Average sunshine days in May: 23.4 days
The month with the most sunshine days is October (24.9 days).
The month with the least sunshine days is February (17.3 days).
Average UV index in May
Riverton, UT
- Average UV index in May: 5
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 2).
Average cloud cover in May
Riverton, UT
- Average cloud cover in May: 21
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in May
Riverton, UT
- 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).
