May weather forecast
South Pass City, WY

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Weather in May

The last month of the spring, May, is a mild month in South Pass City, Wyoming, with an average temperature fluctuating between 39°F (3.9°C) and 58.8°F (14.9°C).

Temperature

South Pass City's May weather brings a rise in high-temperatures, moving from a chilly 47.8°F (8.8°C) in April to a moderate 58.8°F (14.9°C). South Pass City experiences an average temperature drop to a wintry 39°F (3.9°C) during May nights.

Humidity

In South Pass City, the average relative humidity in May is 54%.

Rainfall

In South Pass City, during May, the rain falls for 12.8 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 92 rainfall days, and 10.2" (259mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 2.3 snowfall days, in May, South Pass City aggregates 3.5" (89mm) of snow. In South Pass City, during the entire year, snow falls for 56.8 days and aggregates up to 40.94" (1040mm) of snow.

Daylight

In South Pass City, the average length of the day in May is 14h and 38min.
On the first day of the month, sunrise is at 6:08 am and sunset at 8:15 pm. On the last day of May, sunrise is at 5:40 am and sunset at 8:45 pm MDT.

Sunshine

In May, the average sunshine is 11.1h.

UV index

In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: A daily high UV index of 4 in May leads to these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Opt for tightly woven and loose clothing to enhance protection from the Sun. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

What are May temperatures?

The average high-temperature, in May, in South Pass City, is 58.8°F (14.9°C), while the average low-temperature is 39°F (3.9°C).

What is the average humidity in May?

The average relative humidity in May is 54%.

How much does it rain in May?

In South Pass City, during May, the rain falls for 12.8 days and regularly aggregates up to 1.73" (44mm) of precipitation.

What is the last month it snows?

May is the last month it regularly snows in South Pass City. During 2.3 snowfall days, in May, South Pass City aggregates 3.5" (89mm) of snow.

What is the average length of the day in May?

The average day length in May is 14h and 38min.

When are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 6:08 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:45 pm MDT.

How long on average sun shines in May?

In South Pass City, the average sunshine duration in May is 11.1h.

What is the UV index intensity in May?

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
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
South Pass City, WY

Average temperature in May - South Pass City, WY
  • Average high temperature in May: 58.8°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (28.4°F).

  • Average low temperature in May: 39°F

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).

Average pressure in May
South Pass City, WY

Average pressure in May - South Pass City, WY
  • Average pressure in May: 29.91"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in May
South Pass City, WY

Average wind speed in May - South Pass City, WY
  • Average wind speed in May: 7.1mph

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in May
South Pass City, WY

Average humidity in May - South Pass City, WY
  • Average humidity in May: 54%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (34%).

Average rainfall in May
South Pass City, WY

Average rainfall in May - South Pass City, WY
  • Average rainfall in May: 1.73"

The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is January (0.43").

Average rainfall days in May
South Pass City, WY

Average rainfall days in May - South Pass City, WY
  • Average rainfall days in May: 12.8 days

The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is November (4.8 days).

Average snowfall in May
South Pass City, WY

Average snowfall in May - South Pass City, WY
  • Average snowfall in May: 3.5"

The month with the highest snowfall is April (8.15").
The months with the least snowfall are June, July and August (0").

Average snowfall days in May
South Pass City, WY

Average snowfall days in May - South Pass City, WY
  • Average snowfall days in May: 2.3 days

The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in May /
Average sunshine in May
South Pass City, WY

Average daylight in May / Average sunshine in May - South Pass City, WY
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in May: 11h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

Average sunshine days in May
South Pass City, WY

Average sunshine days in May - South Pass City, WY
  • Average sunshine days in May: 12.5 days

The month with the most sunshine days is September (22 days).
The month with the least sunshine days is April (12.3 days).

Average UV index in May
South Pass City, WY

Average UV index in May - South Pass City, 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
South Pass City, WY

Average cloud cover in May - South Pass City, WY
  • Average cloud cover in May: 25

The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).

Average visibility in May
South Pass City, WY

Average visibility in May - South Pass City, 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).

South Pass City, Wyoming, USA

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