May weather forecast
Cheyenne, WY

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A sunny day in front of the State Capitol building in Cheyenne, Wyoming
A sunny day in front of the State Capitol building in Cheyenne, Wyoming

Weather in May

May sees the weather transition significantly, bringing warmth and higher humidity index which translates into more colorful sceneries. This marked change in climate indicates that the colder days have passed. Sunlight persists for longer, contributing to the blooming flora eagerly basking under it. Despite a downward rainfall trend compared to April, residents experience an average of 2.95" (75mm) of rainfall. The city is ablaze with the pastel tones of spring, fostering brisk mornings and comfortable afternoons.

Temperature

With the start of May in Cheyenne, the average high-temperature marginally shifts from April's cool 53.8°F (12.1°C) to a comfortable 62.4°F (16.9°C). Throughout May in Cheyenne, a steady low-temperature average of 42.3°F (5.7°C) is noted.

Humidity

The average relative humidity in May is 57%.

Rainfall

The month with the most rainfall in Cheyenne is May, when the rain falls for 17.5 days and typically aggregates up to 2.95" (75mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 3.2 snowfall days, in May, Cheyenne aggregates 3.43" (87mm) of snow. In Cheyenne, Wyoming, during the entire year, snow falls for 62 days and aggregates up to 30.51" (775mm) of snow.

Daylight

The average length of the day in May in Cheyenne is 14h and 31min.
On the first day of May, sunrise is at 5:55 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:25 pm MDT.

Sunshine

In Cheyenne, the average sunshine in May is 10.4h.

UV index

In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: The UV index of 5 during May leads to these advisories:
Adopt protective measures - Suggestions to resist sunburn are offered. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

What is the average May temperature in Cheyenne?

The high-temperature, in May, in Cheyenne, records 62.4°F (16.9°C), while the low-temperature is 42.3°F (5.7°C).

What is the average humidity in May in Cheyenne?

The average relative humidity in May in Cheyenne is 57%.

What is the wettest month in Cheyenne?

The month with the most rainfall is May, when the rain falls for 17.5 days and typically aggregates up to 2.95" (75mm) of precipitation.

How much does it rain in Cheyenne in May?

In Cheyenne, Wyoming, during May, the rain falls for 17.5 days and regularly aggregates up to 2.95" (75mm) of precipitation.

What is the last month it snows in Cheyenne?

May is the last month it regularly snows in Cheyenne. During 3.2 snowfall days, in May, Cheyenne aggregates 3.43" (87mm) of snow.

How many hours of daylight does Cheyenne have in May?

In May, the average day length in Cheyenne, Wyoming, is 14h and 31min.

When are sunrise and sunset in May in Cheyenne?

On the first day of May in Cheyenne, sunrise is at 5:55 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:25 pm MDT.

How many hours of sunshine does Cheyenne have in May?

In May, the average sunshine duration in Cheyenne is 10.4h.

What is the UV index intensity in May in Cheyenne?

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's 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
Cheyenne, WY

Average temperature in May - Cheyenne, WY
  • Average high temperature in May: 62.4°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is December (34.7°F).

  • Average low temperature in May: 42.3°F

The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).

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Average pressure in May
Cheyenne, WY

Average pressure in May - Cheyenne, WY
  • Average pressure in May: 29.9"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in May
Cheyenne, WY

Average wind speed in May - Cheyenne, WY
  • Average wind speed in May: 10.4mph

The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in May
Cheyenne, WY

Average humidity in May - Cheyenne, WY
  • Average humidity in May: 57%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (43%).

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Average rainfall in May
Cheyenne, WY

Average rainfall in May - Cheyenne, WY
  • Average rainfall in May: 2.95"

The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days in May
Cheyenne, WY

Average rainfall days in May - Cheyenne, WY
  • Average rainfall days in May: 17.5 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.7 days).

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Average snowfall in May
Cheyenne, WY

Average snowfall in May - Cheyenne, WY
  • Average snowfall in May: 3.43"

The month with the highest snowfall is March (6.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Cheyenne, WY

Average snowfall days in May - Cheyenne, WY
  • Average snowfall days in May: 3.2 days

The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in May /
Average sunshine in May
Cheyenne, WY

Average daylight in May / Average sunshine in May - Cheyenne, WY
  • 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: 10h and 2min

The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).

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Average sunshine days in May
Cheyenne, WY

Average sunshine days in May - Cheyenne, WY
  • Average sunshine days in May: 9.9 days

The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is April (9.3 days).

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Average UV index in May
Cheyenne, WY

Average UV index in May - Cheyenne, WY
  • Average UV index in May: 5

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in May
Cheyenne, WY

Average cloud cover in May - Cheyenne, WY
  • Average cloud cover in May: 32

The months with the most cloud cover are April and May (Cloud cover 32).
The month with the least cloud cover is September (Cloud cover 18).

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Average visibility in May
Cheyenne, WY

Average visibility in May - Cheyenne, WY
  • Average visibility in May: 6mi

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

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Cheyenne, Wyoming, USA

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