May weather forecast and climate
Butte, AK

Weather in May

May, the last month of the spring, in Butte, is a frosty month, with average temperature ranging between max 48.6°F (9.2°C) and min 33.3°F (0.7°C).

Temperature

In Butte, the average high-temperature increases, from a wintry 36.1°F (2.3°C) in April, to a chilly 48.6°F (9.2°C). In May, in Butte, the average low-temperature is 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

January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.1 snowfall days, Butte aggregates 0.16" (4mm) of snow. In Butte, during the entire year, snow falls for 76.2 days, and aggregates up to 33.5" (851mm) of snow.

Daylight

In Butte, the average length of the day is 17.7h.

Sunshine

The month with the most sunshine in Butte is May, with an average of 11.8h of sunshine.

UV index

The average daily maximum UV index in Butte is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 3 in May transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in May in Butte?

In May, the average high-temperature is 48.6°F (9.2°C), and the average low-temperature is 33.3°F (0.7°C).

What are the least humid months in Butte?

Months with the lowest humidity in Butte, Alaska, are May and June, with an average relative humidity of 69%.

What is the average humidity in May in Butte?

The average relative humidity in May is 69%.

How much does it rain in Butte in May?

In Butte, in May, it is raining for 18.3 days, with typically 1.18" (30mm) of accumulated precipitation.

What is the last month it snows in Butte?

May is the last month it regularly snows. During 1.1 snowfall days, in May, Butte aggregates 0.16" (4mm) of snow.

What is the average length of the day in May in Butte?

The average length of the day in May is 17.7h.

What month has the most sunshine in Butte?

With an average of 11.8h of sunshine, May has the most sunshine of the year in Butte, Alaska.

How long on average sun shines in May in Butte?

In Butte, the average sunshine in May is 11.8h.

What is the UV index intensity in May in Butte?

In May, the average daily maximum UV index in Butte, Alaska, is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in May
Butte, AK

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).

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Average pressure in May
Butte, AK

Average pressure in May - Butte, AK
  • Average pressure in May: 29.93"

The month with the highest atmospheric pressure is July (29.96").
Months with the lowest atmospheric pressure are November and December (29.7").

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Average wind speed in May
Butte, AK

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).

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Average humidity in May
Butte, AK

Average humidity in May - Butte, AK
  • Average humidity in May: 69%

The month with the highest relative humidity is March (87%).
Months with the lowest relative humidity are May and June (69%).

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Average rainfall in May
Butte, AK

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").

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Average rainfall days in May
Butte, AK

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).

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Average snowfall in May
Butte, AK

Average snowfall in May - Butte, AK
  • Average snowfall in May: 0.16"

The month with the highest snowfall is February (6.93").
Months with the least snowfall are June, July and August (0").

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Average snowfall days in May
Butte, AK

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).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in May /
Average sunshine in May
Butte, AK

Average daylight in May / Average sunshine in May - Butte, AK
  • Average daylight in May: 17.7h

The month with the longest days is June (Average daylight: 19.4h).
The month with the shortest days is December (Average daylight: 5.5h).

  • Average sunshine in May: 11.8h

The month with the most sunshine is May (Average sunshine: 11.8h).
The month with the least sunshine is December (Average sunshine: 3.9h).

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Average sunshine days in May
Butte, AK

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).

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Average UV index in May
Butte, AK

Average UV index in May - Butte, AK
  • Average UV index in May: 3

Months with the highest UV index are June and July (UV index 4).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in May
Butte, AK

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).

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Average visibility in May
Butte, AK

Average visibility in May - Butte, AK
  • Average visibility in May: 6mi

Months with the highest visibility are May, June, July, August, September, October and November (6mi).
Months with the lowest visibility are February, March and April (4mi).

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