Custer
South Dakota, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Custer, SD

Large, scenic rocks and forests of trees around this tiny Sylvan Lake located in the tranquil Custer State Park in Custer City, South Dakota
Large, scenic rocks and forests of trees around this tiny Sylvan Lake located in the tranquil Custer State Park in Custer City, South Dakota
January, the same as December, is another cold winter month in Custer, South Dakota, with average temperature fluctuating between 36.9°F (2.7°C) and 15.3°F (-9.3°C). In Custer, South Dakota, the average high-temperature in January is practically the same as in December - a still cold 36.9°F (2.7°C). Weather in January »
The last month of the winter, February, is another cold month in Custer, South Dakota, with average temperature fluctuating between 16.7°F (-8.5°C) and 38.1°F (3.4°C). In February, the average high-temperature is essentially the same as in January - a still cold 38.1°F (3.4°C). Weather in February »

March, the first month of the spring, in Custer, is a chilly month, with average temperature varying between 45.1°F (7.3°C) and 22.3°F (-5.4°C). In March, the average high-temperature slightly increases, from a cold 38.1°F (3.4°C) in February, to a chilly 45.1°F (7.3°C). Weather in March »

April is a cool spring month in Custer, South Dakota, with average temperature varying between 52.7°F (11.5°C) and 28.9°F (-1.7°C). In April, the average high-temperature marginally rises, from a frosty 45.1°F (7.3°C) in March, to a fresh 52.7°F (11.5°C). Weather in April »

May, the last month of the spring, in Custer, is a comfortable month, with average temperature fluctuating between 38.7°F (3.7°C) and 62.2°F (16.8°C). In May, the average high-temperature rises, from a fresh 52.7°F (11.5°C) in April, to a comfortable 62.2°F (16.8°C). Weather in May »

June, the first month of the summer, in Custer, is an agreeable month, with average temperature fluctuating between 47.1°F (8.4°C) and 71.8°F (22.1°C). In June, the average high-temperature increases, from a comfortable 62.2°F (16.8°C) in May, to an agreeable 71.8°F (22.1°C). Weather in June »

July in Custer, South Dakota, is a warm summer month, with average temperature varying between 54.1°F (12.3°C) and 79.9°F (26.6°C). The warmest month is July, with an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 54.1°F (12.3°C). Weather in July »

The last month of the summer, August, is another warm month in Custer, South Dakota, with average temperature ranging between max 78.8°F (26°C) and min 52.5°F (11.4°C). In Custer, the average high-temperature is relatively the same as in July - a still moderately hot 78.8°F (26°C). Weather in August »

September, the first month of the autumn, in Custer, is still a pleasant month, with temperature in the range of an average high of 70.2°F (21.2°C) and an average low of 43.3°F (6.3°C). In September, the average high-temperature marginally drops, from a warm 78.8°F (26°C) in August, to a pleasant 70.2°F (21.2°C). Weather in September »

October, like September, is another mild autumn month in Custer, South Dakota, with temperature in the range of an average low of 32.4°F (0.2°C) and an average high of 56.7°F (13.7°C). In October, the average high-temperature decreases, from an agreeable 70.2°F (21.2°C) in September, to a mild 56.7°F (13.7°C). Weather in October »

The last month of the autumn, November, is another chilly month in Custer, South Dakota, with average temperature fluctuating between 22.8°F (-5.1°C) and 43.9°F (6.6°C). In November, the average high-temperature decreases, from a mild 56.7°F (13.7°C) in October, to a frosty 43.9°F (6.6°C). Weather in November »

The first month of the winter, December, is also a wintry month in Custer, South Dakota, with average temperature fluctuating between 35.8°F (2.1°C) and 15.1°F (-9.4°C). The coldest month is December, with an average high-temperature of 35.8°F (2.1°C) and an average low-temperature of 15.1°F (-9.4°C). Weather in December »

How many days does it rain in Custer?

Throughout the year, in Custer, South Dakota, there are 92.3 rainfall days, and 19.6" (499.1mm) of precipitation is accumulated.

What is the driest month in Custer?

January is the month with the least rainfall in Custer, South Dakota. Rain falls for 3.4 days and accumulates 0.3" (8.4mm) of precipitation.

When does it snow in Custer?

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

How many days does it snow in Custer?

In Custer, during the entire year, snow falls for 29.4 days, and aggregates up to 55.9" (1419.8mm) of snow.

When is the lowest UV index in Custer?

Months with the lowest UV index in Custer, South Dakota, are January and December, with an average maximum UV index of 1.

What is the snowiest month in Custer?

The month with the most snowfall in Custer, South Dakota, is March when snow falls for 5.7 days and typically aggregates up to 12" (304.8mm) of snow.

What is the rainiest month in Custer?

May is the month with the most rainfall in Custer, South Dakota. Rain falls for 13.4 days and accumulates 3.6" (90.9mm) of precipitation.

When are the longest days in Custer?

The month with the longest days is June, with an average of 15.4h of daylight.

What is the warmest month in Custer?

The warmest month is July, with an average high-temperature of 79.9°F (26.6°C) and an average low-temperature of 54.1°F (12.3°C).

What month has the most sunshine in Custer?

The month with the most sunshine in Custer, South Dakota, is July, with an average of 11h of sunshine.

What is the month with the highest UV index in Custer?

July is the month with the highest UV index, with an average maximum UV index of 10.

What is the month with the least sunshine in Custer?

Months with the least sunshine are November and December, with an average of 5h of sunshine.

What is the coldest month in Custer?

With an average high-temperature of 35.8°F (2.1°C) and an average low-temperature of 15.1°F (-9.4°C), December is the coldest month.

What is the month with the shortest days in Custer?

With an average of 9h of daylight, December has the shortest days of the year.
Average temperature - Custer, SD
Average rainfall - Custer, SD
Average rainfall days - Custer, SD

The month with the highest number of rainy days is May (13.4 days).
The month with the lowest number of rainy days is January (3.4 days).

Average snowfall days - Custer, SD

Months with the highest number of snowfall days are February and March (5.7 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average daylight / Average sunshine - Custer, SD