May weather forecast
Acton, MT

Weather in May

The last month of the spring, May, is an enjoyable month in Acton, Montana, with an average temperature fluctuating between 44.2°F (6.8°C) and 64°F (17.8°C).

Temperature

In Acton, Montana, the average high-temperature in May increases from a cool 53.8°F (12.1°C) in April to an enjoyable 64°F (17.8°C). In May, in Acton, the average low-temperature is 44.2°F (6.8°C).

Humidity

In May, the average relative humidity is 59%.

Rainfall

The month with the most rainfall is May, when the rain falls for 17.8 days and typically aggregates up to 2.24" (57mm) of precipitation.

Snowfall

Months with snowfall in Acton are January through May, September through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Acton aggregates 0.31" (8mm) of snow. In Acton, during the entire year, snow falls for 68.6 days and aggregates up to 32.56" (827mm) of snow.

Daylight

The average length of the day in May is 14h and 58min.
On the first day of May, sunrise is at 6:01 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:56 pm MDT.

Sunshine

In May, the average sunshine in Acton, Montana, is 9.9h.

UV index

In Acton, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 5 in May interpret into the following advice:
Take precautions - Protection against sun damage is advised. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the average humidity in May in Acton?

The average relative humidity in May in Acton, Montana, is 59%.

What is the wettest month in Acton?

The month with the most rainfall in Acton, Montana, is May, when the rain falls for 17.8 days and typically aggregates up to 2.24" (57mm) of precipitation.

How many days does it rain in May in Acton?

In Acton, Montana, in May, during 17.8 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

What is the last month it snows in Acton?

May is the last month it regularly snows. During 0.8 snowfall days, in May, Acton aggregates 0.31" (8mm) of snow.

How many hours of daylight does Acton have in May?

The average day length in May in Acton is 14h and 58min.

When is the sunrise / sunset in May in Acton?

On the first day of May in Acton, sunrise is at 6:01 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 8:56 pm MDT.

How long on average sun shines in May in Acton?

In May, the average sunshine duration is 9.9h.

What is the UV index reading in May in Acton?

The average daily maximum UV index in May in Acton is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Acton, MT

Average temperature in May - Acton, MT
  • Average high temperature in May: 64°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (31.1°F).

  • Average low temperature in May: 44.2°F

The months with the highest average low temperature are July and August (60.6°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).

[Resources]

Average pressure in May
Acton, MT

Average pressure in May - Acton, MT
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

[Resources]

Average wind speed in May
Acton, MT

Average wind speed in May - Acton, MT
  • Average wind speed in May: 8.6mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

[Resources]

Average humidity in May
Acton, MT

Average humidity in May - Acton, MT
  • Average humidity in May: 59%

The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (40%).

[Resources]

Average rainfall in May
Acton, MT

Average rainfall in May - Acton, MT
  • Average rainfall in May: 2.24"

The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is July (0.43").

[Resources]

Average rainfall days in May
Acton, MT

Average rainfall days in May - Acton, MT
  • Average rainfall days in May: 17.8 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (5.6 days).

[Resources]

Average snowfall in May
Acton, MT

Average snowfall in May - Acton, MT
  • Average snowfall in May: 0.31"

The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July and August (0").

[Resources]

Average snowfall days in May
Acton, MT

Average snowfall days in May - Acton, MT
  • Average snowfall days in May: 0.8 days

The month with the highest number of snowfall days is February (14.3 days).
The months with the least snowfall days are June, July and August (0 days).

[Resources]

Average daylight in May /
Average sunshine in May
Acton, MT

Average daylight in May / Average sunshine in May - Acton, MT
  • Average daylight in May: 14h and 58min

The month with the longest days is June (Average daylight: 15h and 41min).
The month with the shortest days is December (Average daylight: 8h and 43min).

  • Average sunshine in May: 9h and 54min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).

[Resources]

Average sunshine days in May
Acton, MT

Average sunshine days in May - Acton, MT
  • Average sunshine days in May: 10.3 days

The month with the most sunshine days is September (21.1 days).
The month with the least sunshine days is April (9.8 days).

[Resources]

Average UV index in May
Acton, MT

Average UV index in May - Acton, MT
  • Average UV index in May: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

[Resources]

Average cloud cover in May
Acton, MT

Average cloud cover in May - Acton, MT
  • Average cloud cover in May: 36

The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 14).

[Resources]

Average visibility in May
Acton, MT

Average visibility in May - Acton, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location