Climate and monthly weather forecast
Custer, SD

Large, scenic rocks and trees around this tiny Sylvan Lake located in the tranquil Custer State Park in Custer City, South Dakota
Large, scenic rocks and trees around this tiny Sylvan Lake located in the tranquil Custer State Park in Custer City, South Dakota

Weather in January

January, like December, is a freezing cold winter month in Custer, South Dakota, with an average temperature ranging between max 31.1°F (-0.5°C) and min 17.1°F (-8.3°C). In January, the average high-temperature is almost the same as in December - a still freezing cold 31.1°F (-0.5°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Custer, South Dakota, with an average temperature varying between 16.2°F (-8.8°C) and 31.5°F (-0.3°C). In Custer, the average high-temperature in February is relatively the same as in January - a still subzero cold 31.5°F (-0.3°C). 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 min 26.4°F (-3.1°C) and max 43.9°F (6.6°C). In March, the average high-temperature rises from a subzero cold 31.5°F (-0.3°C) in February to a chilly 43.9°F (6.6°C). Weather in March »

Weather in April

April in Custer, South Dakota, is a fresh spring month, with an average temperature varying between 50.9°F (10.5°C) and 32.5°F (0.3°C). In Custer, the average high-temperature in April slightly increases from a frosty 43.9°F (6.6°C) in March to a fresh 50.9°F (10.5°C). Weather in April »

Weather in May

May, the last month of the spring in Custer, is an enjoyable month, with an average temperature varying between 42.4°F (5.8°C) and 61°F (16.1°C). In Custer, South Dakota, the average high-temperature in May increases from a fresh 50.9°F (10.5°C) in April to an enjoyable 61°F (16.1°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Custer, South Dakota, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 74.1°F (23.4°C). In Custer, the average high-temperature in June rises from a comfortable 61°F (16.1°C) in May to a warm 74.1°F (23.4°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Custer, South Dakota, with an average temperature varying between 81.7°F (27.6°C) and 60.4°F (15.8°C). With an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 60.4°F (15.8°C), July is the warmest month. The average heat index in July is calculated to be 82.4°F (28°C). Weather in July »

Weather in August

August, the last month of the summer in Custer, is also a moderately hot month, with an average temperature fluctuating between 80.1°F (26.7°C) and 58.3°F (14.6°C). In Custer, the average high-temperature in August is practically the same as in July - a still moderately hot 80.1°F (26.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Custer, South Dakota, with temperature in the range of an average high of 71.4°F (21.9°C) and an average low of 51.1°F (10.6°C). In September, the average high-temperature slightly decreases from a moderately hot 80.1°F (26.7°C) in August to a pleasant 71.4°F (21.9°C). Weather in September »

Weather in October

October, the same as September, is a cool autumn month in Custer, South Dakota, with an average temperature varying between 36.7°F (2.6°C) and 54°F (12.2°C). In October, the average high-temperature significantly decreases from an agreeable 71.4°F (21.9°C) in September to a fresh 54°F (12.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Custer, South Dakota, with an average temperature ranging between max 42.3°F (5.7°C) and min 25.9°F (-3.4°C). In November, the average high-temperature decreases from a fresh 54°F (12.2°C) in October to a cold 42.3°F (5.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Custer, South Dakota, with an average temperature varying between 29.8°F (-1.2°C) and 16.5°F (-8.6°C). December is the coldest month, with an average high-temperature of 29.8°F (-1.2°C) and an average low-temperature of 16.5°F (-8.6°C). Weather in December »
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FAQ

What is the most humid month in Custer?

January and February, with an average relative humidity of 77%, are most humid months.

What is the driest month in Custer?

The month with the least rainfall in Custer, South Dakota, is January, when the rain falls for 6.2 days and typically collects 0.47" (12mm) of precipitation.

How many days does it rain in Custer?

Throughout the year, in Custer, South Dakota, there are 135.4 rainfall days, and 20.39" (518mm) of precipitation is accumulated.

When does it snow in Custer?

Months with snowfall in Custer are January through May, September through December.

How much does it snow in Custer?

In Custer, South Dakota, during the entire year, snow falls for 75.1 days and aggregates up to 40.24" (1022mm) of snow.

What are the months with the lowest UV index in Custer?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the month with the least sunshine in Custer?

February has the least sunshine of the year in Custer, South Dakota, with an average of 6h of sunshine.

When is Daylight Saving Time (DST) in Custer?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Custer, South Dakota, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

What is the snowiest month in Custer?

April is the month with the most snowfall in Custer. Snow falls for 8.8 days and accumulates 7.24" (184mm) of snow.

What is the wettest month in Custer?

The month with the most rainfall is June, when the rain falls for 18 days and typically aggregates up to 3.19" (81mm) of precipitation.

When it does not snow in Custer?

In Custer, South Dakota, snow does not fall in June through August.

When are the longest days in Custer?

June has the longest days of the year in Custer, South Dakota, with an average of 15h and 24min of daylight.

What is the warmest month in Custer?

July is the warmest month in Custer, South Dakota, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 60.4°F (15.8°C).

When is the highest UV index in Custer?

With an average maximum UV index of 6, July is the month with the highest UV index.

What is the least humid month in Custer?

The months with the lowest humidity are August and September, with an average relative humidity of 52%.

What month has the most sunshine in Custer?

The month with the most sunshine in Custer is August, with an average of 11.7h of sunshine.

What is the coldest month in Custer?

With an average high-temperature of 29.8°F (-1.2°C) and an average low-temperature of 16.5°F (-8.6°C), December is the coldest month.

What is the month with the shortest days in Custer?

With an average of 8h and 59min of daylight, December has the shortest days of the year.

Average temperature
Custer, SD

Average temperature - Custer, SD

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (29.8°F).

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).

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Average pressure
Custer, SD

Average pressure - Custer, SD

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed
Custer, SD

Average wind speed - Custer, SD

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity
Custer, SD

Average humidity - Custer, SD

The months with the highest relative humidity are January and February (77%).
The months with the lowest relative humidity are August and September (52%).

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Average rainfall
Custer, SD

Average rainfall - Custer, SD

The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days
Custer, SD

Average rainfall days - Custer, SD

The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (4.5 days).

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Average snowfall
Custer, SD

Average snowfall - Custer, SD

The month with the highest snowfall is April (7.24").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Custer, SD

Average snowfall days - Custer, SD

The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Custer, SD

Average daylight / Average sunshine - Custer, SD

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 59min).

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).

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Average sunshine days
Custer, SD

Average sunshine days - Custer, SD

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (7.8 days).

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Average UV index
Custer, SD

Average UV index - Custer, SD

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average visibility
Custer, SD

Average visibility - Custer, SD

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).

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