May weather forecast
Jackson, WY

A calm and clear river and vast green fields approaching the iconic white mountains within the Grand Teton National Park in Jackson, Wyoming
A calm and clear river and vast green fields approaching the iconic white mountains within the Grand Teton National Park in Jackson, Wyoming

Weather in May

May, the last month of the spring in Jackson, is a cool month, with an average temperature fluctuating between 28.8°F (-1.8°C) and 50.5°F (10.3°C).

Temperature

In May, the average high-temperature increases from a wintry 37.8°F (3.2°C) in April to a cool 50.5°F (10.3°C). The average low-temperature, is 28.8°F (-1.8°C).

Humidity

In Jackson, the average relative humidity in May is 75%.

Rainfall

In Jackson, in May, during 15.4 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, there are 103 rainfall days, and 29.84" (758mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Jackson are January through December. In Jackson, in May, during 15.7 snowfall days, 11.42" (290mm) of snow is typically accumulated. Throughout the year, there are 173.6 snowfall days, and 181.26" (4604mm) of snow is accumulated.

Daylight

The average length of the day in May in Jackson is 14h and 43min.
On the first day of May, sunrise is at 6:15 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 8:56 pm MDT.

Sunshine

In May, the average sunshine is 9.5h.

UV index

In Jackson, the average daily maximum UV index in May is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 3 in May interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Jackson?

In May, the average relative humidity in Jackson is 75%.

How much does it rain in Jackson in May?

In Jackson, during May, the rain falls for 15.4 days and regularly aggregates up to 2.87" (73mm) of precipitation.

How many days does it snow in May in Jackson?

In May, in Jackson, it is snowing for 15.7 days. Throughout May, 11.42" (290mm) of snow is accumulated.

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

In Jackson, the average day length in May is 14h and 43min.

What time are sunrise and sunset in May in Jackson?

In May, on the first day of the month, sunrise is at 6:15 am and sunset at 8:25 pm. On the last day of the month, in Jackson, Wyoming, sunrise is at 5:45 am and sunset at 8:56 pm MDT.

How many hours of sunshine does Jackson have in May?

In Jackson, Wyoming, the average sunshine duration in May is 9.5h.

What is the UV index intensity in May in Jackson?

In Jackson, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.

Average temperature in May
Jackson, WY

Average temperature in May - Jackson, WY
  • Average high temperature in May: 50.5°F

The warmest month (with the highest average high temperature) is July (73.4°F).
The month with the lowest average high temperature is December (21.9°F).

  • Average low temperature in May: 28.8°F

The month with the highest average low temperature is July (43.5°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).

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Average pressure in May
Jackson, WY

Average pressure in May - Jackson, WY
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Jackson, WY

Average wind speed in May - Jackson, WY
  • Average wind speed in May: 4.9mph

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).

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Average humidity in May
Jackson, WY

Average humidity in May - Jackson, WY
  • Average humidity in May: 75%

The month with the highest relative humidity is February (94%).
The month with the lowest relative humidity is August (50%).

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Average rainfall in May
Jackson, WY

Average rainfall in May - Jackson, WY
  • Average rainfall in May: 2.87"

The wettest month (with the highest rainfall) is February (3.54").
The driest month (with the least rainfall) is August (1.34").

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Average rainfall days in May
Jackson, WY

Average rainfall days in May - Jackson, WY
  • Average rainfall days in May: 15.4 days

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (2.9 days).

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Average snowfall in May
Jackson, WY

Average snowfall in May - Jackson, WY
  • Average snowfall in May: 11.42"

The month with the highest snowfall is February (29.33").
The month with the least snowfall is August (0.12").

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Average snowfall days in May
Jackson, WY

Average snowfall days in May - Jackson, WY
  • Average snowfall days in May: 15.7 days

The month with the highest number of snowfall days is March (24.8 days).
The month with the least snowfall days is July (0.4 days).

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

Average daylight in May / Average sunshine in May - Jackson, WY
  • Average daylight in May: 14h and 43min

The month with the longest days is June (Average daylight: 15h and 22min).
The month with the shortest days is December (Average daylight: 9h and 1min).

  • Average sunshine in May: 9.5h

The month with the most sunshine is July (Average sunshine: 11.6h).
The month with the least sunshine is February (Average sunshine: 3.4h).

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Average sunshine days in May
Jackson, WY

Average sunshine days in May - Jackson, WY
  • Average sunshine days in May: 5.9 days

The month with the most sunshine days is July (15.6 days).
The month with the least sunshine days is April (3.8 days).

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Average UV index in May
Jackson, WY

Average UV index in May - Jackson, WY
  • Average UV index in May: 3

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).

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Average cloud cover in May
Jackson, WY

Average cloud cover in May - Jackson, WY
  • Average cloud cover in May: 38

The month with the most cloud cover is February (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in May
Jackson, WY

Average visibility in May - Jackson, WY
  • Average visibility in May: 5mi

The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).

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