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 indicates a change in the average high-temperature, moving up from a frosty 43.3°F (6.3°C) in April to a cool 55°F (12.8°C). In Butte, an average temperature of 34.2°F (1.2°C) is noted during May nights.Humidity
In May, the average relative humidity is 67%.Rainfall
May is the month with the most rainfall. Rain falls for 15.9 days and accumulates 2.24" (57mm) of precipitation.Snowfall
January through June, September through December are months with snowfall in Butte, Montana. In May, it is snowing for 5.3 days. Throughout May, 5" (127mm) of snow is accumulated. In Butte, during the entire year, snow falls for 103.1 days and aggregates up to 52.56" (1335mm) of snow.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
In May, the average sunshine is 9.7h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In May, the average maximum UV index of 4 translates into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What is the average May temperature in Butte?
What is the average humidity in May in Butte?
What is the rainiest month in Butte?
How many days does it rain in May in Butte?
How many days does it snow in May in Butte?
How many hours of daylight does Butte have in May?
When are sunrise and sunset in May in Butte?
How many hours of sunshine does Butte have in May?
What is the UV index reading in May in Butte?
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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