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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a freezing cold winter month in Custer, Montana, with an average temperature ranging between max 31.1°F (-0.5°C) and min 17.6°F (-8°C). Custer experiences lowest temperatures, averaging a high-temperature of 31.1°F (-0.5°C) during January and December. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Custer, Montana, with an average temperature ranging between max 32°F (0°C) and min 18°F (-7.8°C). February's onset sees an average high-temperature of an icy 32°F (0°C), exhibiting a slight fluctuation from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Custer, is a chilly month, with an average temperature ranging between max 45.5°F (7.5°C) and min 29.5°F (-1.4°C). March indicates a change in the average high-temperature, moving up from a wintry 32°F (0°C) in February to a frosty 45.5°F (7.5°C). Weather in March »
Weather in April
April in Custer, Montana, is a cool spring month, with an average temperature fluctuating between 55.2°F (12.9°C) and 37.6°F (3.1°C). April brings a rise in Custer's average high-temperature, moving from a frosty 45.5°F (7.5°C) in March to a cool 55.2°F (12.9°C). Weather in April »
Weather in May
May, the last month of the spring in Custer, is a refreshing month, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 46.4°F (8°C). May's arrival signals a temperature shift, moving from a cool 55.2°F (12.9°C) in April to a refreshing 65.8°F (18.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Custer, Montana, with an average temperature ranging between max 77.2°F (25.1°C) and min 55.9°F (13.3°C). Custer's transition into June is marked by a rise in the average high-temperature, advancing from a refreshing 65.8°F (18.8°C) in May to a warm 77.2°F (25.1°C). Weather in June »
Weather in July
July in Custer, Montana, is a tropical summer month, with an average temperature ranging between max 86.5°F (30.3°C) and min 64.2°F (17.9°C). In Custer, the peak temperatures are generally noted in July, averaging a high of 86.5°F (30.3°C) and a low of 64.2°F (17.9°C). July's mean heat index is estimated at a tropical 86°F (30°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Custer, Montana, with an average temperature fluctuating between 63.1°F (17.3°C) and 84.7°F (29.3°C). As Custer welcomes August, the average high-temperature stabilizes at a warm 84.7°F (29.3°C), showing little deviation from July's 86.5°F (30.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Custer, Montana, with an average temperature varying between 74.7°F (23.7°C) and 54.9°F (12.7°C). The arrival of September signals a shift in temperature, down from 84.7°F (29.3°C) in August to a still moderately hot 74.7°F (23.7°C). Weather in September »
Weather in October
October, like September, is another mild autumn month in Custer, Montana, with temperature in the range of an average low of 41.4°F (5.2°C) and an average high of 57.2°F (14°C). As September gives way to October, the average high-temperature displays a considerable decrease, falling from a moderately hot 74.7°F (23.7°C) to a refreshing 57.2°F (14°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Custer, Montana, with an average temperature varying between 43.7°F (6.5°C) and 29.1°F (-1.6°C). In Custer, entering November brings a temperature decrement, reducing from October's refreshing 57.2°F (14°C) to a chilly 43.7°F (6.5°C). Weather in November »
Weather in December
December, the first month of the winter in Custer, is also a subzero cold month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 31.1°F (-0.5°C). During January and December, Custer experiences its lowest temperatures, averaging a high-temperature of 31.1°F (-0.5°C). Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Custer?
Custer witnesses its lowest temperatures during January and December, when the average high-temperature reaches 31.1°F (-0.5°C).
What is the most humid month in Custer?
With an average relative humidity of 79%, January is the most humid month in Custer.
How much does it rain in Custer?
In Custer, during the entire year, the rain falls for 107 days and collects up to 12.17" (309mm) of precipitation.
When does it snow in Custer?
January through May, September through December are months with snowfall.
How much does it snow in Custer?
Throughout the year, there are 48.3 snowfall days, and 17.68" (449mm) of snow is accumulated.
What are the months with the lowest UV index in Custer?
The months with the lowest UV index in Custer, Montana, are January through March, November and December, with an average maximum UV index of 2.
When does it snow the most in Custer?
February is the month with the most snowfall in Custer, Montana. Snow falls for 10.6 days and accumulates 4.29" (109mm) of snow.
What is the month with the least sunshine in Custer?
February has the least sunshine of the year, with an average of 5.2h of sunshine.
When is Daylight Saving Time (DST) in Custer?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Custer, 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.
What is the rainiest month in Custer?
The month with the most rainfall is May, when the rain falls for 14.3 days and typically aggregates up to 1.85" (47mm) of precipitation.
When it does not snow in Custer?
June through August are months without snowfall.
When are the longest days in Custer?
June has the longest days of the year, with an average of 15h and 42min of daylight.
What is the hottest time of year in Custer?
The month of July sees the average highest temperatures in Custer, reaching 86.5°F (30.3°C) at the peak and 64.2°F (17.9°C) at the low.
What month has the most sunshine in Custer?
With an average of 11.8h of sunshine, July has the most sunshine of the year in Custer.
What is the month with the highest UV index in Custer?
With an average maximum UV index of 7, July is the month with the highest UV index in Custer.
What is the least humid month in Custer?
With an average relative humidity of 38%, August is the least humid month.
What is the driest month in Custer?
December is the month with the least rainfall in Custer, Montana. Rain falls for 4.5 days and accumulates 0.55" (14mm) of precipitation.
What is the month with the shortest days in Custer?
December has the shortest days of the year, with an average of 8h and 42min of daylight.
Average temperature
Custer, MT
The warmest month (with the highest average high temperature) is July (86.5°F).
The months with the lowest average high temperature are January and December (31.1°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure
Custer, MT
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.89"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.93"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.05"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed
Custer, MT
- Average wind speed in January:
9.7mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.9mph - Average wind speed in April:
10.2mph - Average wind speed in May:
9.9mph - Average wind speed in June:
9.1mph
- Average wind speed in July:
8.2mph - Average wind speed in August:
8.2mph - Average wind speed in September:
8.8mph - Average wind speed in October:
9.6mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (8.2mph).
Average humidity
Custer, MT
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall
Custer, MT
- Average rainfall in January:
0.59" - Average rainfall in February:
0.71" - Average rainfall in March:
0.83" - Average rainfall in April:
1.5" - Average rainfall in May:
1.85" - Average rainfall in June:
1.65"
- Average rainfall in July:
0.87" - Average rainfall in August:
0.98" - Average rainfall in September:
1.26" - Average rainfall in October:
0.79" - Average rainfall in November:
0.59" - Average rainfall in December:
0.55"
The wettest month (with the highest rainfall) is May (1.85").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days
Custer, MT
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
4.9 days - Average rainfall days in March:
9.9 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
11.8 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
9.8 days - Average rainfall days in September:
7.9 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
5.5 days - Average rainfall days in December:
4.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is December (4.5 days).
Average snowfall
Custer, MT
The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Custer, MT
- Average snowfall days in January:
9.8 days - Average snowfall days in February:
10.6 days - Average snowfall days in March:
6.9 days - Average snowfall days in April:
3.8 days - Average snowfall days in May:
0.6 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:
1.9 days - Average snowfall days in November:
5.6 days - Average snowfall days in December:
8.9 days
The month with the highest number of snowfall days is February (10.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Custer, MT
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 4min - Average daylight in May:
15h and 0min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 2min - Average daylight in August:
14h and 1min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 3min - Average daylight in December:
8h and 4min
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 2min - Average sunshine in February:
5h and 1min - Average sunshine in March:
7h and 2min - Average sunshine in April:
9h and 1min - Average sunshine in May:
10h and 1min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 4min - Average sunshine in September:
10h and 2min - Average sunshine in October:
6h and 2min - Average sunshine in November:
6h and 2min - Average sunshine in December:
5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days
Custer, MT
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
15.6 days - Average sunshine days in April:
13.5 days - Average sunshine days in May:
14 days - Average sunshine days in June:
14.6 days
- Average sunshine days in July:
16.3 days - Average sunshine days in August:
17.1 days - Average sunshine days in September:
19 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
19.2 days - Average sunshine days in December:
18.1 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is April (13.5 days).
Average UV index
Custer, 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
Custer, MT
The month with the most cloud cover is February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility
Custer, 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).
Custer, Montana, USA
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