May weather forecastRoy, UT
May
Weather in May
May in Roy, Utah, brings a moderating effect on the temperature, reaching a comfortable high of 62.8°F (17.1°C). With daylight hours rising above 14 hours a day, longer sun exposure becomes more frequent. Meanwhile, snowfall virtually ceases to exist, signaling a definitive end to winter. As the beginning of the warm season, May encourages tremendous outdoor activities with its favorable climatological conditions. The alteration from wet to vibrant conditions makes May a visually spectacular month to experience nature at its finest.Temperature
The arrival of May brings an increase in high-temperatures, moving from a cool 52.7°F (11.5°C) in April to a comfortable 62.8°F (17.1°C). Roy observes an average low-temperature of 43.5°F (6.4°C) during May.Humidity
In Roy, the average relative humidity in May is 53%.Rainfall
In Roy, in May, it is raining for 12.5 days, with typically 1.14" (29mm) of accumulated precipitation. In Roy, Utah, during the entire year, the rain falls for 91.6 days and collects up to 11.06" (281mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Roy aggregates 0.31" (8mm) of snow. In Roy, during the entire year, snow falls for 37.8 days and aggregates up to 24.76" (629mm) of snow.Daylight
The average length of the day in May is 14h and 31min.On the first day of May, sunrise is at 6:24 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:57 am and sunset at 8:54 pm MDT.
Sunshine
In May, the average sunshine is 11.1h.UV index
The average daily maximum UV index in May in Roy is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 5 in May translates into this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Roy, UT
- Average high temperature in May: 62.8°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in May: 43.5°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in May
Roy, UT
- Average pressure in May: 29.9"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Roy, UT
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity in May
Roy, UT
- Average humidity in May: 53%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (37%).
Average rainfall in May
Roy, UT
- Average rainfall in May: 1.14"
The wettest month (with the highest rainfall) is April (1.26").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in May
Roy, UT
- Average rainfall days in May: 12.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in May
Roy, UT
- Average snowfall in May: 0.31"
The month with the highest snowfall is January (6.89").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Roy, UT
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Roy, UT
- Average daylight in May: 14h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 11h and 6min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in May
Roy, UT
- Average sunshine days in May: 14.8 days
The months with the most sunshine days are October and November (21.6 days).
The month with the least sunshine days is April (14.7 days).
Average UV index in May
Roy, UT
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Roy, UT
- Average cloud cover in May: 23
The months with the most cloud cover are January and February (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in May
Roy, UT
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
