May weather forecast
Big Horn, WY

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Weather in May

May, the last month of the spring in Big Horn, is a moderate month, with temperature in the range of an average low of 39.4°F (4.1°C) and an average high of 57.2°F (14°C).

Temperature

The beginning of May signals a rise in the average high-temperature, moving from a frosty 47.1°F (8.4°C) in April to a mild 57.2°F (14°C). Throughout May nights, Big Horn experiences a consistent temperature average of 39.4°F (4.1°C).

Humidity

The average relative humidity in May is 67%.

Rainfall

The month with the most rainfall is May, when the rain falls for 22.3 days and typically aggregates up to 3.43" (87mm) of precipitation.

Snowfall

Months with snowfall in Big Horn, Wyoming, are January through May, September through December. May is the last month it regularly snows. During 2 snowfall days, in May, Big Horn aggregates 2.17" (55mm) of snow. In Big Horn, during the entire year, snow falls for 78.9 days and aggregates up to 46.3" (1176mm) of snow.

Daylight

The average length of the day in May in Big Horn, Wyoming, is 14h and 50min.
On the first day of the month, sunrise is at 5:56 am and sunset at 8:13 pm. On the last day of May, in Big Horn, sunrise is at 5:25 am and sunset at 8:45 pm MDT.

Sunshine

In May, the average sunshine is 10.5h.

UV index

In Big Horn, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Big Horn in May?

The average high-temperature and low-temperature during May are 57.2°F (14°C) and 39.4°F (4.1°C) respectively.

What is the average humidity in May in Big Horn?

In Big Horn, Wyoming, the average relative humidity in May is 67%.

What is the rainiest month in Big Horn?

The month with the most rainfall is May, when the rain falls for 22.3 days and typically aggregates up to 3.43" (87mm) of precipitation.

How much does it rain in Big Horn in May?

In May, the rain falls for 22.3 days. Throughout May, 3.43" (87mm) of precipitation is accumulated.

What is the last month it snows in Big Horn?

May is the last month it regularly snows in Big Horn. During 2 snowfall days, in May, Big Horn aggregates 2.17" (55mm) of snow.

How many hours of daylight does Big Horn have in May?

In May, the average day length in Big Horn is 14h and 50min.

What time are sunrise and sunset in May in Big Horn?

On the first day of May in Big Horn, sunrise is at 5:56 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 8:45 pm MDT.

How many hours of sunshine does Big Horn have in May?

In May, the average sunshine duration in Big Horn, Wyoming, is 10.5h.

What is the UV index intensity in May in Big Horn?

The average daily maximum UV index in May in Big Horn is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability 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
Big Horn, WY

Average temperature in May - Big Horn, WY
  • Average high temperature in May: 57.2°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (29.1°F).

  • Average low temperature in May: 39.4°F

The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).

Average pressure in May
Big Horn, WY

Average pressure in May - Big Horn, WY
  • Average pressure in May: 29.91"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in May
Big Horn, WY

Average wind speed in May - Big Horn, WY
  • Average wind speed in May: 7.2mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in May
Big Horn, WY

Average humidity in May - Big Horn, WY
  • Average humidity in May: 67%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (46%).

Average rainfall in May
Big Horn, WY

Average rainfall in May - Big Horn, WY
  • Average rainfall in May: 3.43"

The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is December (0.75").

Average rainfall days in May
Big Horn, WY

Average rainfall days in May - Big Horn, WY
  • Average rainfall days in May: 22.3 days

The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (7.5 days).

Average snowfall in May
Big Horn, WY

Average snowfall in May - Big Horn, WY
  • Average snowfall in May: 2.17"

The month with the highest snowfall is April (8.7").
The months with the least snowfall are June, July and August (0").

Average snowfall days in May
Big Horn, WY

Average snowfall days in May - Big Horn, WY
  • Average snowfall days in May: 2 days

The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in May /
Average sunshine in May
Big Horn, WY

Average daylight in May / Average sunshine in May - Big Horn, WY
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in May: 10h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 6min).

Average sunshine days in May
Big Horn, WY

Average sunshine days in May - Big Horn, WY
  • Average sunshine days in May: 5.8 days

The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is May (5.8 days).

Average UV index in May
Big Horn, WY

Average UV index in May - Big Horn, WY
  • Average UV index in May: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

Average cloud cover in May
Big Horn, WY

Average cloud cover in May - Big Horn, WY
  • Average cloud cover in May: 33

The months with the most cloud cover are February and April (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 15).

Average visibility in May
Big Horn, WY

Average visibility in May - Big Horn, 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).

Big Horn, Wyoming, USA

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