May weather forecast
Alton, UT

Weather in May

May, the last month of the spring, in Alton, is a moderate month, with temperature in the range of an average high of 59.9°F (15.5°C) and an average low of 39.2°F (4°C).

Temperature

In May, the average high-temperature increases, from a cool 50.2°F (10.1°C) in April, to a mild 59.9°F (15.5°C). In May, in Alton, the average low-temperature is 39.2°F (4°C).

Humidity

In May, the average relative humidity is 42%.

Rainfall

In Alton, during May, the rain falls for 8.3 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 84.8 rainfall days, and 22.05" (560mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 3.9 snowfall days, Alton aggregates 4.65" (118mm) of snow. Throughout the year, in Alton, there are 66.4 snowfall days, and 75.08" (1907mm) of snow is accumulated.

Daylight

In Alton, the average length of the day in May is 14.2h.

Sunshine

The average sunshine in Alton is 10.8h.

UV index

In Alton, Utah, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in May in Alton?

In Alton, the average relative humidity in May is 42%.

How much does it rain in Alton in May?

In Alton, during May, the rain falls for 8.3 days and regularly aggregates up to 1.81" (46mm) of precipitation.

What is the last month it snows in Alton?

May is the last month it regularly snows in Alton, Utah. During 3.9 snowfall days, in May, Alton aggregates 4.65" (118mm) of snow.

How many hours of daylight does Alton have in May?

In Alton, Utah, the average length of the day in May is 14.2h.

How many hours of sunshine does Alton have in May?

In May, the average sunshine is 10.8h.

How high is the UV index in May in Alton?

The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in May
Alton, UT

Average temperature in May - Alton, UT
  • Average high temperature in May: 59.9°F

The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is December (32.9°F).

  • Average low temperature in May: 39.2°F

The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is December (17.2°F).

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Average pressure in May
Alton, UT

Average pressure in May - Alton, UT
  • Average pressure in May: 29.86"

The month with the highest atmospheric pressure is January (30.2").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in May
Alton, UT

Average wind speed in May - Alton, UT
  • Average wind speed in May: 8.8mph

The windiest month (with the highest average wind speed) is April (9mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in May
Alton, UT

Average humidity in May - Alton, UT
  • Average humidity in May: 42%

The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is June (29%).

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Average rainfall in May
Alton, UT

Average rainfall in May - Alton, UT
  • Average rainfall in May: 1.81"

The wettest month (with the highest rainfall) is July (3.98").
The driest month (with the least rainfall) is June (0.39").

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Average rainfall days in May
Alton, UT

Average rainfall days in May - Alton, UT
  • Average rainfall days in May: 8.3 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in May
Alton, UT

Average snowfall in May - Alton, UT
  • Average snowfall in May: 4.65"

The month with the highest snowfall is December (14.06").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Alton, UT

Average snowfall days in May - Alton, UT
  • Average snowfall days in May: 3.9 days

The month with the highest number of snowfall days is December (12.5 days).
Months with the least snowfall days are July and August (0 days).

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

Average daylight in May / Average sunshine in May - Alton, UT
  • Average daylight in May: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in May: 10.8h

The month with the most sunshine is June (Average sunshine: 11.7h).
Months with the least sunshine are January and December (Average sunshine: 5.8).

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Average sunshine days in May
Alton, UT

Average sunshine days in May - Alton, UT
  • Average sunshine days in May: 17.9 days

The month with the most sunshine days is June (23.4 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in May
Alton, UT

Average UV index in May - Alton, UT
  • Average UV index in May: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in May
Alton, UT

Average cloud cover in May - Alton, UT
  • Average cloud cover in May: 20

Months with the most cloud cover are February and December (Cloud cover 38).
The month with the least cloud cover is June (Cloud cover 10).

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Average visibility in May
Alton, UT

Average visibility in May - Alton, UT
  • Average visibility in May: 6mi

Months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are January, February and December (5mi).

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