Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
In Jackson, the onset of May comes with an increased average high-temperature, moving from April's icy 41.9°F (5.5°C) to a cool 54.1°F (12.3°C). During the nights in May, Jackson observes an average low-temperature of 33.8°F (1°C).Humidity
In Jackson, the average relative humidity in May is 64%.Rainfall
In Jackson, in May, during 18.3 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Jackson, during the entire year, the rain falls for 129.5 days and collects up to 12.4" (315mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows in Jackson, Montana. During 1.7 snowfall days, in May, Jackson aggregates 0.94" (24mm) of snow. Throughout the year, there are 63.5 snowfall days, and 22.76" (578mm) of snow is accumulated.Daylight
The average length of the day in May in Jackson is 14h and 55min.On the first day of May in Jackson, sunrise is at 6:20 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 9:14 pm MDT.
Sunshine
In Jackson, the average sunshine in May is 10.5h.UV index
In Jackson, the average daily maximum UV index in May is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 3 during May leads to these advisories:
Exercise prevention - Protecting skin and eyes from harm is required. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the temperature in May in Jackson?
What is the average humidity in May in Jackson?
How much does it rain in Jackson in May?
What is the last month it snows in Jackson?
What is the average length of the day in May in Jackson?
When are sunrise and sunset in May in Jackson?
How long on average sun shines in May in Jackson?
What is the UV index intensity in May in Jackson?
Average temperature in May
Jackson, MT
- Average high temperature in May: 54.1°F
The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is December (25.2°F).
- Average low temperature in May: 33.8°F
The month with the highest average low temperature is August (47.5°F).
The coldest months (with the lowest average low temperature) are January and December (9.5°F).
Average pressure in May
Jackson, MT
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.25"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Jackson, MT
- Average wind speed in May: 4.8mph
The windiest months (with the highest average wind speed) are March and April (5.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Jackson, MT
- Average humidity in May: 64%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is August (43%).
Average rainfall in May
Jackson, MT
- Average rainfall in May: 1.89"
The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are July and August (0.51").
Average rainfall days in May
Jackson, MT
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in May
Jackson, MT
- Average snowfall in May: 0.94"
The month with the highest snowfall is February (5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Jackson, MT
- Average snowfall days in May: 1.7 days
The month with the highest number of snowfall days is February (12.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Jackson, MT
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 10h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in May
Jackson, MT
- Average sunshine days in May: 8.1 days
The month with the most sunshine days is July (19.4 days).
The month with the least sunshine days is April (7.7 days).
Average UV index in May
Jackson, MT
- 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 and December (UV index 1).
Average cloud cover in May
Jackson, MT
- Average cloud cover in May: 32
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Jackson, MT
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Jackson, Montana, USA
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