May weather forecast
Roy, UT

Share

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 shift from April to May in Roy sees an increase in the average high-temperature, transitioning from a cool 52.7°F (11.5°C) to an enjoyable 62.8°F (17.1°C). An average low-temperature of 43.5°F (6.4°C) is recorded in the month of May in Roy.

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. Throughout the year, there are 91.6 rainfall days, and 11.06" (281mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Roy, Utah, are January through May, September through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Roy aggregates 0.31" (8mm) of snow. Throughout the year, there are 37.8 snowfall days, and 24.76" (629mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 31min.
On the first day of the month, sunrise is at 6:24 am and sunset at 8:25 pm. On the last day of May, in Roy, Utah, sunrise is at 5:57 am and sunset at 8:54 pm MDT.

Sunshine

In Roy, the average sunshine in May is 11.1h.

UV index

In Roy, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 5 during May translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
[Resources]

Frequently asked questions

What is the usual temperature for Roy in May?

The high-temperature, in May, in Roy, is 62.8°F (17.1°C), while the low-temperature averages to 43.5°F (6.4°C).

What is the average humidity in May in Roy?

In Roy, the average relative humidity in May is 53%.

How many days does it rain in May in Roy?

In Roy, in May, during 12.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.

What is the last month it snows in Roy?

May is the last month it regularly snows in Roy. During 0.3 snowfall days, in May, Roy aggregates 0.31" (8mm) of snow.

What is the average length of the day in May in Roy?

The average day length in May in Roy, Utah, is 14h and 31min.

What time are sunrise and sunset in May in Roy?

In May, on the first day of the month, sunrise is at 6:24 am and sunset at 8:25 pm. On the last day of the month, in Roy, Utah, sunrise is at 5:57 am and sunset at 8:54 pm MDT.

How long on average sun shines in May in Roy?

The average sunshine duration in May in Roy, Utah, is 11.1h.

What is the UV index reading in May in Roy?

In May, the average daily maximum UV index in Roy is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Roy, UT

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).

[Resources]

Average pressure in May
Roy, UT

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).

[Resources]

Average wind speed in May
Roy, UT

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).

[Resources]

Average humidity in May
Roy, UT

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%).

[Resources]

Average rainfall in May
Roy, UT

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").

[Resources]

Average rainfall days in May
Roy, UT

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).

[Resources]

Average snowfall in May
Roy, UT

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").

[Resources]

Average snowfall days in May
Roy, UT

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).

[Resources]

Average daylight in May /
Average sunshine in May
Roy, UT

Average daylight in May / Average sunshine in May - Roy, UT
  • Average daylight in May: 14h and 3min

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 1min

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).

[Resources]

Average sunshine days in May
Roy, UT

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).

[Resources]

Average UV index in May
Roy, UT

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).

[Resources]

Average cloud cover in May
Roy, UT

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).

[Resources]

Average visibility in May
Roy, UT

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).

[Resources]

Roy, Utah, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location