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
May comes with an increase, with the average high-temperature moving from a chilly 49.6°F (9.8°C) in April to a moderate 60.3°F (15.7°C). Sweet Grass's nighttime temperature during May is consistently averaged at a wintry 42.4°F (5.8°C).Humidity
In May, the average relative humidity is 56%.Rainfall
In May, the rain falls for 10.4 days. Throughout May, 1.3" (33mm) of precipitation is accumulated. In Sweet Grass, during the entire year, the rain falls for 70.4 days and collects up to 8.46" (215mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.3 snowfall days, in May, Sweet Grass aggregates 0.79" (20mm) of snow. Throughout the year, in Sweet Grass, there are 54.3 snowfall days, and 19.49" (495mm) of snow is accumulated.Daylight
In May, the average length of the day is 15h and 19min.On the first day of May, sunrise is at 6:05 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 9:23 pm MDT.
Sunshine
The average sunshine in May is 10.3h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In May, the maximum UV index of 4 translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Sweet Grass?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
How many hours of sunshine does Sweet Grass have in May?
What is the UV index intensity in May?
Average temperature in May
Sweet Grass, MT
- Average high temperature in May: 60.3°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is December (27.1°F).
- Average low temperature in May: 42.4°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (15.3°F).
Average pressure in May
Sweet Grass, MT
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Sweet Grass, MT
- Average wind speed in May: 9.9mph
The windiest month (with the highest average wind speed) is January (11.8mph).
The calmest months (with the lowest average wind speed) are July and August (8.8mph).
Average humidity in May
Sweet Grass, MT
- Average humidity in May: 56%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (43%).
Average rainfall in May
Sweet Grass, MT
- Average rainfall in May: 1.3"
The wettest month (with the highest rainfall) is June (1.77").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in May
Sweet Grass, MT
- Average rainfall days in May: 10.4 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is November (2.6 days).
Average snowfall in May
Sweet Grass, MT
- Average snowfall in May: 0.79"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Sweet Grass, MT
- Average snowfall days in May: 1.3 days
The month with the highest number of snowfall days is December (10.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Sweet Grass, MT
- Average daylight in May: 15h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in May: 10h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in May
Sweet Grass, MT
- Average sunshine days in May: 17.8 days
The month with the most sunshine days is July (23.5 days).
The month with the least sunshine days is April (17.4 days).
Average UV index in May
Sweet Grass, MT
- 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, October, November and December (UV index 2).
Average cloud cover in May
Sweet Grass, MT
- Average cloud cover in May: 33
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in May
Sweet Grass, MT
- 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).
Sweet Grass, Montana, USA
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