Climate and monthly weather forecastActon, MT
Climate and monthly weather forecast
Weather in January
January is a cold winter month in Acton, Montana, with an average temperature fluctuating between 19.2°F (-7.1°C) and 32.2°F (0.1°C). January notes an average high-temperature of a wintry 32.2°F (0.1°C), subtly differing from December's 31.1°F (-0.5°C). Weather in January »Weather in February
February, the last month of the winter in Acton, is another cold month, with an average temperature fluctuating between 18.3°F (-7.6°C) and 32.9°F (0.5°C). The average high-temperature during February registers at a still icy 32.9°F (0.5°C), closely corresponding to the preceding month. Weather in February »Weather in March
March, the first month of the spring in Acton, is a chilly month, with an average temperature fluctuating between 29.1°F (-1.6°C) and 45.3°F (7.4°C). Acton's transition into March brings a rise in the average high-temperature, moving from an icy 32.9°F (0.5°C) in February to a chilly 45.3°F (7.4°C). Weather in March »Weather in April
April in Acton, Montana, is a fresh spring month, with an average temperature varying between 35.8°F (2.1°C) and 53.8°F (12.1°C). The shift from March to April sees a slight increase in the average high-temperature, transitioning from a chilly 45.3°F (7.4°C) to a cool 53.8°F (12.1°C). Weather in April »Weather in May
May, the last month of the spring in Acton, is a comfortable month, with an average temperature fluctuating between 64°F (17.8°C) and 44.2°F (6.8°C). May's arrival coincides with a temperature rise, moving from April's fresh 53.8°F (12.1°C) to a refreshing 64°F (17.8°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Acton, Montana, with an average temperature ranging between max 75.6°F (24.2°C) and min 53.1°F (11.7°C). June marks a rise in the average high-temperature, moving from May's comfortable 64°F (17.8°C) to a moderately hot 75.6°F (24.2°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Acton, Montana, with an average temperature fluctuating between 85.5°F (29.7°C) and 60.6°F (15.9°C). July, known for its average high temperature of 85.5°F (29.7°C) and an average low temperature of 60.6°F (15.9°C), is the warmest month. The heat index value for July is appraised at a hot 86°F (30°C). Weather in July »Weather in August
August, the last month of the summer in Acton, is also a moderately hot month, with an average temperature varying between 60.6°F (15.9°C) and 83.5°F (28.6°C). August ushers in an average high-temperature of a still moderately hot 83.5°F (28.6°C), aligning closely with the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Acton, Montana, with an average temperature varying between 73.2°F (22.9°C) and 52.5°F (11.4°C). As September arrives, Acton's weather displays a decrease in high-temperatures, transitioning from August's moderately hot 83.5°F (28.6°C) to an agreeable 73.2°F (22.9°C). Weather in September »Weather in October
October, like September, is a moderate autumn month in Acton, Montana, with an average temperature fluctuating between 56.3°F (13.5°C) and 39.9°F (4.4°C). Acton's weather in October is characterized by a distinct drop in the average high-temperature, reducing from a pleasant 73.2°F (22.9°C) in September to a moderate 56.3°F (13.5°C). Weather in October »Weather in November
November, the last month of the autumn in Acton, is also a wintry month, with an average temperature ranging between max 42.4°F (5.8°C) and min 28°F (-2.2°C). With November's arrival, Acton, Montana, sees a decrease in average high-temperatures, moving from a mild 56.3°F (13.5°C) in October to an icy 42.4°F (5.8°C). Weather in November »Weather in December
The first month of the winter, December, is also a subzero cold month in Acton, Montana, with an average temperature ranging between max 31.1°F (-0.5°C) and min 18.7°F (-7.4°C). December brings the lowest temperatures, with an average high of 31.1°F (-0.5°C) and an average low of 18.7°F (-7.4°C). Weather in December »Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the most humid month in Acton, Montana, with an average relative humidity of 76%.
In Acton, during the entire year, the rain falls for 120.5 days and collects up to 13.54" (344mm) of precipitation.
Months with snowfall in Acton, Montana, are January through May, September through December.
Throughout the year, there are 68.6 snowfall days, and 32.56" (827mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
The month with the most snowfall in Acton is February, when snow falls for 14.3 days and typically aggregates up to 6.61" (168mm) of snow.
The month with the least sunshine in Acton is February, with an average of 5.3h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
May is the month with the most rainfall in Acton. Rain falls for 17.8 days and accumulates 2.24" (57mm) of precipitation.
June through August are months without snowfall.
With an average of 15h and 42min of daylight, June has the longest days of the year.
In Acton, July is the month with the highest recorded average temperatures, measuring a high of 85.5°F (29.7°C) and a low of 60.6°F (15.9°C).
The month with the least rainfall is July, when the rain falls for 7.4 days and typically collects 0.43" (11mm) of precipitation.
With an average of 11.9h of sunshine, July has the most sunshine of the year in Acton.
The month with the highest UV index is July, with an average maximum UV index of 7.
August is the least humid month, with an average relative humidity of 40%.
December, with its high-temperature average of 31.1°F (-0.5°C) and a low-temperature average of 18.7°F (-7.4°C), is the coldest month.
December has the shortest days of the year, with an average of 8h and 42min of daylight.
Average temperature
Acton, MT
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).
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).
Average pressure
Acton, MT
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.86"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.13"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).
Average wind speed
Acton, MT
- Average wind speed in January:
9.9mph - Average wind speed in February:
9.1mph - Average wind speed in March:
8.7mph - Average wind speed in April:
9.4mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
7.1mph - Average wind speed in August:
7.2mph - Average wind speed in September:
8.1mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.5mph
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).
Average humidity
Acton, MT
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (40%).
Average rainfall
Acton, MT
- Average rainfall in January:
0.83" - Average rainfall in February:
0.98" - Average rainfall in March:
1.26" - Average rainfall in April:
2.01" - Average rainfall in May:
2.24" - Average rainfall in June:
1.77"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.63" - Average rainfall in September:
0.67" - Average rainfall in October:
1.1" - Average rainfall in November:
0.87" - Average rainfall in December:
0.75"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days
Acton, MT
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
7.3 days - Average rainfall days in March:
12.4 days - Average rainfall days in April:
16.7 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
12.8 days
- Average rainfall days in July:
7.4 days - Average rainfall days in August:
9.3 days - Average rainfall days in September:
6.8 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
7.4 days - Average rainfall days in December:
7.5 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).
Average snowfall
Acton, MT
- Average snowfall in January:
5.43" - Average snowfall in February:
6.61" - Average snowfall in March:
5.16" - Average snowfall in April:
3.62" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is February (6.61").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Acton, MT
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
14.3 days - Average snowfall days in March:
10.3 days - Average snowfall days in April:
5.6 days - Average snowfall days in May:
0.8 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.2 days - Average snowfall days in October:
2.9 days - Average snowfall days in November:
8.2 days - Average snowfall days in December:
13.5 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).
Average daylight / Average sunshine
Acton, MT
- Average daylight in January:
9h and 6min - Average daylight in February:
10h and 24min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 36min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 42min
- Average daylight in July:
15h and 18min - Average daylight in August:
14h and 6min - Average daylight in September:
12h and 30min - Average daylight in October:
10h and 54min - Average daylight in November:
9h and 30min - Average daylight in December:
8h and 42min
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 January:
5h and 36min - Average sunshine in February:
5h and 18min - Average sunshine in March:
7h and 36min - Average sunshine in April:
9h and 6min - Average sunshine in May:
9h and 54min - Average sunshine in June:
11h and 24min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
11h and 36min - Average sunshine in September:
10h and 18min - Average sunshine in October:
6h and 30min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 30min
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).
Average sunshine days
Acton, MT
- Average sunshine days in January:
16.3 days - Average sunshine days in February:
11.7 days - Average sunshine days in March:
11.1 days - Average sunshine days in April:
9.8 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
14.9 days
- Average sunshine days in July:
21 days - Average sunshine days in August:
18.4 days - Average sunshine days in September:
21.1 days - Average sunshine days in October:
17.5 days - Average sunshine days in November:
16.7 days - Average sunshine days in December:
15.2 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).
Average UV index
Acton, MT
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).
Average cloud cover
Acton, MT
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility
Acton, MT
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).
