Monthly weather forecast and climate
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 temperature in the range of an average low of 18°F (-7.8°C) and an average high of 32.7°F (0.4°C). In Rapid City, South Dakota, the average high-temperature is relatively the same as in December - a still wintry 32.7°F (0.4°C). Weather in January »

Weather in February

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

Weather in March

March, the first month of the spring, in Rapid City, is a frosty month, with temperature in the range of an average low of 28.8°F (-1.8°C) and an average high of 45.5°F (7.5°C). In March, the average high-temperature increases, from a cold 33.4°F (0.8°C) in February, to a frosty 45.5°F (7.5°C). Weather in March »

Weather in April

April in Rapid City, South Dakota, is a fresh spring month, with average temperature ranging between max 53.2°F (11.8°C) and min 35.4°F (1.9°C). In April, the average high-temperature marginally rises, 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 an enjoyable month, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 63.1°F (17.3°C). In Rapid City, South Dakota, the average high-temperature in May increases, from a fresh 53.2°F (11.8°C) in April, to an enjoyable 63.1°F (17.3°C). Weather in May »

Weather in June

June, the first month of the summer, in Rapid City, is a warm month, with temperature in the range of an average low of 55.9°F (13.3°C) and an average high of 76.5°F (24.7°C). In Rapid City, 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 temperature in the range of an average high of 84.7°F (29.3°C) and an average low of 63.3°F (17.4°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). The average heat index is evaluated at a tropical 86.5°F (30.3°C). Weather in July »

Weather in August

August, the last month of the summer, in Rapid City, is another warm month, with average temperature fluctuating between 61.5°F (16.4°C) and 82.8°F (28.2°C). In Rapid City, the average high-temperature in August is practically the same as in July - a still moderately hot 82.8°F (28.2°C). Weather in August »

Weather in September

September, the first month of the autumn, in Rapid City, is also a moderately hot month, with average temperature varying between 73.9°F (23.3°C) and 54°F (12.2°C). In September, the average high-temperature slightly decreases, from 82.8°F (28.2°C) in August, to a still warm 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 average temperature fluctuating between 39.9°F (4.4°C) and 56.5°F (13.6°C). In Rapid City, South Dakota, the average high-temperature plummets, 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

The last month of the autumn, November, is also a frosty month in Rapid City, South Dakota, with average temperature ranging between min 29.1°F (-1.6°C) and max 45.1°F (7.3°C). In November, the average high-temperature drops, from a moderate 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 average temperature fluctuating between 18.7°F (-7.4°C) and 32.5°F (0.3°C). The coldest month 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). Weather in December »
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FAQ

What is the most humid month in Rapid City?

With an average relative humidity of 77%, January is the most humid month in Rapid City, South Dakota.

How many days does it rain in Rapid City?

In Rapid City, during the entire year, the rain falls for 118.8 days and collects up to 15.39" (391mm) of precipitation.

What is the driest month in Rapid City?

January is the month with the least rainfall in Rapid City. Rain falls for 5.3 days and accumulates 0.43" (11mm) of precipitation.

When does it snow in Rapid City?

January through May, September through December are months with snowfall in Rapid City, South Dakota.

How many days does it snow in Rapid City?

In Rapid City, during the entire year, snow falls for 50.4 days, and aggregates up to 24.41" (620mm) of snow.

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

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the month with the least sunshine in Rapid City?

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

When does it snow the most in Rapid City?

The month with the most snowfall in Rapid City, South Dakota, is April when snow falls for 5.3 days and typically aggregates up to 5.43" (138mm) of snow.

What is the rainiest month in Rapid City?

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

When it does not snow in Rapid City?

In Rapid City snow does not fall in June through August.

When are the longest days in Rapid City?

June has the longest days of the year, with an average of 15.4h 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.

What is the warmest month in Rapid City?

The warmest month in Rapid City is July, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 63.3°F (17.4°C).

What are the least humid months in Rapid City?

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

What month has the most sunshine in Rapid City?

August has the most sunshine of the year in Rapid City, with an average of 11.8h of sunshine.

What is the coldest month in Rapid City?

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).

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

The month with the shortest days in Rapid City, South Dakota, is December, with an average of 8.9h 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").
The month with the lowest atmospheric pressure is June (29.84").

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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%).
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").
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).
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: 15.4h).
The month with the shortest days is December (Average daylight: 8.9h).

The month with the most sunshine is August (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 5.9h).

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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

Months with the highest UV index are June and July (UV index 6).
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

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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