Climate and monthly weather forecast
Rapid City, SD

A scenic panorama of the Rapid City in South Dakota
A scenic panorama of the Rapid City in South Dakota

Weather in January

January, the same as December, is another cold winter month in Rapid City, South Dakota, with an average temperature fluctuating between 18°F (-7.8°C) and 32.7°F (0.4°C). In January, the average high-temperature is practically the same as in December - a still wintry 32.7°F (0.4°C). Weather in January »

Weather in February

February, the last month of the winter in Rapid City, is another cold month, with an average temperature ranging between max 33.4°F (0.8°C) and min 17.8°F (-7.9°C). In Rapid City, South Dakota, the average high-temperature in February is relatively the same as in January - a still wintry 33.4°F (0.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Rapid City, South Dakota, with an average temperature varying between 28.8°F (-1.8°C) and 45.5°F (7.5°C). In March, the average high-temperature rises from a cold 33.4°F (0.8°C) in February to a chilly 45.5°F (7.5°C). Weather in March »

Weather in April

April is a fresh spring month in Rapid City, South Dakota, with an average temperature fluctuating between 35.4°F (1.9°C) and 53.2°F (11.8°C). In April, the average high-temperature slightly increases from a frosty 45.5°F (7.5°C) in March to a cool 53.2°F (11.8°C). Weather in April »

Weather in May

May, the last month of the spring in Rapid City, is a comfortable month, with an average temperature fluctuating between 63.1°F (17.3°C) and 45.3°F (7.4°C). In Rapid City, the average high-temperature in May increases from a cool 53.2°F (11.8°C) in April to an enjoyable 63.1°F (17.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Rapid City, South Dakota, with an average temperature ranging between min 55.9°F (13.3°C) and max 76.5°F (24.7°C). In Rapid City, South Dakota, the average high-temperature in June increases from a comfortable 63.1°F (17.3°C) in May to a warm 76.5°F (24.7°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Rapid City, South Dakota, with an average temperature fluctuating between 63.3°F (17.4°C) and 84.7°F (29.3°C). July is the warmest month, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 63.3°F (17.4°C). In July, the average heat index is estimated at a hot 86°F (30°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Rapid City, South Dakota, with an average temperature ranging between max 82.8°F (28.2°C) and min 61.5°F (16.4°C). In Rapid City, South Dakota, the average high-temperature in August is practically the same as in July - a still warm 82.8°F (28.2°C). Weather in August »

Weather in September

September, the first month of the autumn in Rapid City, is still a warm month, with an average temperature ranging between min 54°F (12.2°C) and max 73.9°F (23.3°C). In September, the average high-temperature slightly decreases from 82.8°F (28.2°C) in August to a still moderately hot 73.9°F (23.3°C). Weather in September »

Weather in October

October, the same as September, in Rapid City, South Dakota, is a moderate autumn month, with an average temperature ranging between max 56.5°F (13.6°C) and min 39.9°F (4.4°C). In Rapid City, the average high-temperature in October declines considerably from a moderately hot 73.9°F (23.3°C) in September to a mild 56.5°F (13.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Rapid City, is also a frosty month, with an average temperature varying between 29.1°F (-1.6°C) and 45.1°F (7.3°C). In November, the average high-temperature decreases from a mild 56.5°F (13.6°C) in October to a frosty 45.1°F (7.3°C). Weather in November »

Weather in December

December, the first month of the winter in Rapid City, is also a wintry month, with an average temperature varying between 32.5°F (0.3°C) and 18.7°F (-7.4°C). December is the coldest month, with an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 18.7°F (-7.4°C). Weather in December »
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FAQ

What is the most humid month in Rapid City?

The most humid month in Rapid City is January, with an average relative humidity of 77%.

What is the driest month in Rapid City?

The month with the least rainfall in Rapid City is January, when the rain falls for 5.3 days and typically collects 0.43" (11mm) of precipitation.

How much does it rain in Rapid City?

Throughout the year, in Rapid City, South Dakota, there are 118.8 rainfall days, and 15.39" (391mm) of precipitation is accumulated.

When does it snow in Rapid City?

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

How much does it snow in Rapid City?

Throughout the year, there are 50.4 snowfall days, and 24.41" (620mm) of snow is accumulated.

What are the months with the lowest UV index in Rapid City?

January, February, November and 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 Rapid City?

February has the least sunshine of the year in Rapid City, South Dakota, with an average of 5.9h of sunshine.

When is Daylight Saving Time (DST) in Rapid City?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, 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.

When does it snow the most in Rapid City?

April is the month with the most snowfall in Rapid City, South Dakota. Snow falls for 5.3 days and accumulates 5.43" (138mm) of snow.

What is the rainiest month in Rapid City?

May is the month with the most rainfall in Rapid City. Rain falls for 17.1 days and accumulates 2.28" (58mm) of precipitation.

When it does not snow in Rapid City?

June through August are months without snowfall in Rapid City.

When are the longest days in Rapid City?

The month with the longest days is June, with an average of 15h and 26min of daylight.

When is the highest UV index in Rapid City?

June and July, with an average maximum UV index of 6, are months with the highest UV index in Rapid City, South Dakota.

What is the warmest month in Rapid City?

With an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 63.3°F (17.4°C), July is the warmest month.

What is the least humid month in Rapid City?

The months with the lowest humidity in Rapid City, South Dakota, are August and September, with an average relative humidity of 50%.

What month has the most sunshine in Rapid City?

The month with the most sunshine in Rapid City, South Dakota, is August, with an average of 11.8h of sunshine.

What is the coldest month in Rapid City?

The coldest month in Rapid City is December, with an average high-temperature of 32.5°F (0.3°C) and an average low-temperature of 18.7°F (-7.4°C).

What is the month with the shortest days in Rapid City?

December has the shortest days of the year in Rapid City, with an average of 8h and 57min of daylight.

Average temperature
Rapid City, SD

Average temperature - Rapid City, SD

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).

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Average pressure
Rapid City, SD

Average pressure - Rapid City, SD

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed
Rapid City, SD

Average wind speed - Rapid City, SD

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

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Average humidity
Rapid City, SD

Average humidity - Rapid City, SD

The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).

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Average rainfall
Rapid City, SD

Average rainfall - Rapid City, SD

The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days
Rapid City, SD

Average rainfall days - Rapid City, SD

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).

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Average snowfall
Rapid City, SD

Average snowfall - Rapid City, SD

The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Rapid City, SD

Average snowfall days - Rapid City, SD

The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Rapid City, SD

Average daylight / Average sunshine - Rapid City, SD

The month with the longest days is June (Average daylight: 15h and 26min).
The month with the shortest days is December (Average daylight: 8h and 57min).

The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).

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Average sunshine days
Rapid City, SD

Average sunshine days - Rapid City, SD

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).

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Average UV index
Rapid City, SD

Average UV index - Rapid City, SD

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

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Average visibility
Rapid City, SD

Average visibility - Rapid City, 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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