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
The shift from April to May is marked by an increase in the average high-temperature, moving from a frosty 43.5°F (6.4°C) to a refreshing 56.7°F (13.7°C). May nights in Grantsdale present a stark temperature decrease to an icy 33.4°F (0.8°C).Humidity
In May, the average relative humidity is 71%.Rainfall
In May, in Grantsdale, the rain falls for 19.5 days. Throughout May, 1.97" (50mm) of precipitation is accumulated. In Grantsdale, during the entire year, the rain falls for 163.6 days and collects up to 20.83" (529mm) of precipitation.Snowfall
Months with snowfall in Grantsdale are January through May, September through December. May is the last month it regularly snows in Grantsdale. During 2.3 snowfall days, in May, Grantsdale aggregates 0.67" (17mm) of snow. Throughout the year, there are 101.1 snowfall days, and 59.17" (1503mm) of snow is accumulated.Daylight
In May, the average length of the day is 15h and 0min.On the first day of May, sunrise is at 6:21 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 9:20 pm MDT.
Sunshine
In Grantsdale, Montana, the average sunshine in May is 10.4h.UV index
In Grantsdale, the average daily maximum UV index in May is 4. 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 maximum daily UV index of 4 during May translates into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. To avoid the Sun's strongest rays, limit exposure around the mid-day period. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Frequently asked questions
What is the average May temperature in Grantsdale?
What is the average humidity in May in Grantsdale?
How much does it rain in Grantsdale in May?
What is the last month it snows in Grantsdale?
How many hours of daylight does Grantsdale have in May?
When is the sunrise / sunset in May in Grantsdale?
How long on average sun shines in May in Grantsdale?
What is the UV index reading in May in Grantsdale?
Average temperature in May
Grantsdale, MT
- Average high temperature in May: 56.7°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.8°F).
- Average low temperature in May: 33.4°F
The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (14°F).
Average pressure in May
Grantsdale, MT
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Grantsdale, MT
- Average wind speed in May: 4.5mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in May
Grantsdale, MT
- Average humidity in May: 71%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (50%).
Average rainfall in May
Grantsdale, MT
- Average rainfall in May: 1.97"
The wettest months (with the highest rainfall) are February and April (2.36").
The driest month (with the least rainfall) is August (0.75").
Average rainfall days in May
Grantsdale, MT
- Average rainfall days in May: 19.5 days
The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is July (8 days).
Average snowfall in May
Grantsdale, MT
- Average snowfall in May: 0.67"
The month with the highest snowfall is February (13.03").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Grantsdale, MT
- Average snowfall days in May: 2.3 days
The month with the highest number of snowfall days is February (19.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Grantsdale, MT
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 10h and 2min
The months with the most sunshine are July and August (Average sunshine: 11h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in May
Grantsdale, MT
- Average sunshine days in May: 8.5 days
The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is February (5.6 days).
Average UV index in May
Grantsdale, MT
- Average UV index in May: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in May
Grantsdale, MT
- Average cloud cover in May: 33
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Grantsdale, 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).
Grantsdale, Montana, USA
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