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
An increase in the average high-temperature marks May, moving from April's chilly 43.3°F (6.3°C) to a fresh 55°F (12.8°C). May's average low-temperature reading settles at a cold 34.2°F (1.2°C).Humidity
The average relative humidity in May is 67%.Rainfall
The month with the most rainfall is May, when the rain falls for 15.9 days and typically aggregates up to 2.24" (57mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. In Butte, in May, during 5.3 snowfall days, 5" (127mm) of snow is typically accumulated. Throughout the year, there are 103.1 snowfall days, and 52.56" (1335mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 59min.On the first day of May, sunrise is at 6:15 am and sunset at 8:38 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 9:13 pm MDT.
Sunshine
The average sunshine in May is 9.7h.UV index
In May, the average daily maximum UV index in Butte is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In May, a regular UV index of 4 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the wettest month?
How much does it rain in May?
How much does it snow in May?
How many hours of daylight does Butte have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Butte have in May?
What is the UV index reading in May?
Average temperature in May
Butte, MT
- Average high temperature in May: 55°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is December (25.2°F).
- Average low temperature in May: 34.2°F
The month with the highest average low temperature is July (46.9°F).
The coldest month (with the lowest average low temperature) is December (9°F).
Average pressure in May
Butte, MT
- Average pressure in May: 29.95"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Butte, MT
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in May
Butte, MT
- Average humidity in May: 67%
The months with the highest relative humidity are January, February and December (87%).
The month with the lowest relative humidity is July (48%).
Average rainfall in May
Butte, MT
- Average rainfall in May: 2.24"
The wettest month (with the highest rainfall) is May (2.24").
The driest months (with the least rainfall) are January, November and December (0.67").
Average rainfall days in May
Butte, MT
- Average rainfall days in May: 15.9 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is November (4.1 days).
Average snowfall in May
Butte, MT
- Average snowfall in May: 5"
The month with the highest snowfall is March (8.74").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Butte, MT
- Average snowfall days in May: 5.3 days
The month with the highest number of snowfall days is February (17.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Butte, 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: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in May
Butte, MT
- Average sunshine days in May: 11 days
The month with the most sunshine days is August (19.1 days).
The month with the least sunshine days is April (9.8 days).
Average UV index in May
Butte, MT
- Average UV index in May: 4
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in May
Butte, MT
- Average cloud cover in May: 38
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Butte, 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 and December (4mi).
Butte, Montana, USA
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