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's onset brings a temperature rise, moving from a cold 36.1°F (2.3°C) in April to a chilly 48.6°F (9.2°C). The mean low-temperature during May nights is a wintry 33.3°F (0.7°C).Humidity
May and June, with an average relative humidity of 69%, are the least humid months.Rainfall
In Butte, during May, the rain falls for 18.3 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Butte, during the entire year, the rain falls for 190.7 days and collects up to 17.4" (442mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows in Butte. During 1.1 snowfall days, in May, Butte aggregates 0.16" (4mm) of snow. Throughout the year, there are 76.2 snowfall days, and 33.5" (851mm) of snow is accumulated.Daylight
In Butte, the average length of the day in May is 17h and 39min.On the first day of May, sunrise is at 5:41 am and sunset at 10:04 pm. On the last day of the month, sunrise is at 4:28 am and sunset at 11:19 pm AKDT.
Sunshine
May has the most sunshine of the year, with an average of 11.8h of sunshine.UV index
In Butte, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In May, the UV index of 3 transforms into the following advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the least humid month?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Butte have in May?
When is the sunrise / sunset in May?
What month has the most sunshine in Butte?
How many hours of sunshine does Butte have in May?
How high is the UV index in May?
Average temperature in May
Butte, AK
- Average high temperature in May: 48.6°F
The warmest month (with the highest average high temperature) is July (61.2°F).
The month with the lowest average high temperature is January (18.1°F).
- Average low temperature in May: 33.3°F
The month with the highest average low temperature is July (44.2°F).
The coldest month (with the lowest average low temperature) is January (8.1°F).
Average pressure in May
Butte, AK
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.7"Hg).
Average wind speed in May
Butte, AK
- Average wind speed in May: 4.4mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is July (4mph).
Average humidity in May
Butte, AK
- Average humidity in May: 69%
The month with the highest relative humidity is March (87%).
The months with the lowest relative humidity are May and June (69%).
Average rainfall in May
Butte, AK
- Average rainfall in May: 1.18"
The wettest month (with the highest rainfall) is September (2.24").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in May
Butte, AK
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is June (22.4 days).
The month with the least rainy days is February (8.9 days).
Average snowfall in May
Butte, AK
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (6.93").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Butte, AK
- Average snowfall days in May: 1.1 days
The month with the highest number of snowfall days is February (14.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Butte, AK
- Average daylight in May: 17h and 4min
The month with the longest days is June (Average daylight: 19h and 24min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- Average sunshine in May: 11h and 5min
The month with the most sunshine is May (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in May
Butte, AK
- Average sunshine days in May: 9.1 days
The month with the most sunshine days is January (13.9 days).
The month with the least sunshine days is June (5.3 days).
Average UV index in May
Butte, AK
- Average UV index in May: 3
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Butte, AK
- Average cloud cover in May: 38
The month with the most cloud cover is April (Cloud cover 46).
The month with the least cloud cover is January (Cloud cover 37).
Average visibility in May
Butte, AK
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February, March and April (4mi).
Butte, Alaska, USA
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