Jackson
Wyoming, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
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
May, the last month of the spring, in Jackson, is a fresh month, with average temperature ranging between max 50.5°F (10.3°C) and min 32°F (0°C).

Temperature

In May, the average high-temperature rises, from a cold 37.8°F (3.2°C) in April, to a cool 50.5°F (10.3°C). In May, the average low-temperature is 32°F (0°C).

Humidity

In May, the average relative humidity is 75%.

Rainfall

In Jackson, Wyoming, during May, the rain falls for 15.4 days and regularly aggregates up to 2.87" (73mm) of precipitation. In Jackson, during the entire year, the rain falls for 103 days and collects up to 29.84" (758mm) of precipitation.

Snowfall

January through December are months with snowfall in Jackson. In Jackson, during 15.7 snowfall days, 11.42" (290mm) of snow is typically accumulated. In Jackson, during the entire year, snow falls for 173.6 days, and aggregates up to 181.26" (4604mm) of snow.

Daylight

In Jackson, the average length of the day in May is 14.7h.

Sunshine

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

UV index

In May, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In May, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in May in Jackson?

In Jackson, in May, the average high-temperature is 50.5°F (10.3°C), and the average low-temperature is 32°F (0°C).

What is the average humidity in May in Jackson?

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

How much does it rain in Jackson in May?

In May, in Jackson, Wyoming, the rain falls for 15.4 days. Throughout May, 2.87" (73mm) of precipitation is accumulated.

How much does it snow in Jackson in May?

In Jackson, Wyoming, in May, snow falls for 15.7 days, with typically accumulated 11.42" (290mm) of snow.

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

In Jackson, the average length of the day in May is 14.7h.

How long on average sun shines in May in Jackson?

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

How high is the UV index in May in Jackson?

In May, the average daily maximum UV index in Jackson, Wyoming, is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.
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: 0°F

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°F).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°F).

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%).

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 lowest rainfall) is August (1.34").

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 lowest number of rainy days is January (2.9 days).

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 lowest snowfall is August (0.12").

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 lowest number of snowfall days is July (0.4 days).

Average daylight in May / Average sunshine in May - Jackson, WY
  • Average daylight in May: 14.7h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in May: 9.5h

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

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).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).