Rapid City, SD weather and climate in 2025
Day
4 °C
Night
-9 °C
Sea
0 °C
Precipitation
9 mm
in month
Rainy days
6 days
in month
Daylight
9 hours
average
Sunshine
5 hours
average
Humidity
65 %
Day
4 °C
Night
-9 °C
Sea
0 °C
Precipitation
9 mm
in month
Rainy days
6 days
in month
Daylight
9 hours
average
Sunshine
5 hours
average
Humidity
65 %
Overview: Rapid City, SD
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Weather overview for Rapid City, SD
Weather overview
Rapid City, SD (United States of America) in general has a mild continental climate. Temperatures during the day are in the range from 4 °C (39 °F) in December to 30 °C (87 °F) in July. The highest night temperatures could be experienced in July with 15 °C (59 °F), the lowest in January with -9 °C (15 °F). The driest month is November with just 5 days of rain, on the contrary, the month when it rains the most is May with 12 days of rain.
January weather
The rainfall amount reaches its minimum, with its value being 8 mm (0.32 in) in Rapid City, SD. The dry season continues. The minimum of the night temperature is observable in this month. The beginning of the rise of the number of sun hours (without clouds) could be noticed, with its value of 5 hours.
February weather
The number of sun hours (without clouds) continues to rise, with its value of 6 hours in Rapid City, SD. The dry season continues.
March weather
The day temperature starts to rise, with its value being 9 °C (47 °F) in Rapid City, SD, and the night temperature starts to rise as well. The number of rainy days rise's start could be observed, with its value of 7 days, and the rainfall amount rise's start could be observed as well, its value is 24 mm (0.94 in). The rise of the number of sun hours (without clouds) can be observed, with its value being 7 hours.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.April weather
The number of rainy days continues to rise, with its value of 10 days in Rapid City, SD, and the rainfall amount rises similarly to the previous month as well, with its value being 50 mm (1.95 in). The day temperature rises similarly to the previous month, with its value being 14 °C (57 °F), and the night temperature rises similarly to the previous month too, the value of this measure is 0 °C (32 °F). The rise of the number of sun hours (without clouds) can be observed, the value of this measure is 8 hours.
May weather
The maximum of the number of rainy days can be noticed, the value of this measure is 12 days in Rapid City, SD, and the maximum of the rainfall amount is observable as well in May. The day temperature rises similarly to the previous month, its value is 20 °C (67 °F), and the night temperature continues to rise too, with its value of 6 °C (42 °F). The rise of the number of sun hours (without clouds) can be observed, with its value of 9 hours. The wind speed is on its maximum, its value is 5.
June weather
The day temperature rises similarly to the previous month, its value is 25 °C (78 °F) in Rapid City, SD, and the rise of the night temperature can be observed as well, its value is 11 °C (52 °F). The tourist season is about to start. The rainfall amount starts to descent, with its value being 74 mm (2.89 in). The number of sun hours (without clouds) rises similarly to the previous month, with its value of 10 hours. The day length reaches its maximum, the value of this measure is 15 hours.
July weather
The tourist season continues in Rapid City, SD. The maximum of the day temperature can be noticed, with its value being 30 °C (87 °F), and the night temperature reaches its maximum too, with its value being 15 °C (59 °F). The rainfall amount continues to descent, the value of this measure is 61 mm (2.39 in), while the number of rainy days starts to descent in this month. The number of sun hours (without clouds) is on its maximum.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.August weather
The tourist season continues in August in Rapid City, SD. The number of rainy days continues to descent, with its value of 8 days, and the descent of the rainfall amount can be observed as well, with its value of 46 mm (1.82 in). The day temperature descent's start could be observed, the value of this measure is 30 °C (85 °F), and the beginning of the descent of the night temperature could be noticed as well, the value of this measure is 14 °C (57 °F). The minimum of the humidity can be noticed in August.
September weather
There is pending tourist season in Rapid City, SD. The number of rainy days continues to descent, its value is 7 days, and the rainfall amount descents similarly to the previous month too, with its value being 36 mm (1.43 in). The day temperature descents similarly to the previous month, with its value of 24 °C (75 °F), and the night temperature continues to descent as well, its value is 8 °C (47 °F). The number of sun hours (without clouds) descents similarly to the previous month, with its value being 9 hours.
October weather
The day temperature continues to descent, with its value being 16 °C (62 °F) in Rapid City, SD, and the night temperature continues to descent too. The descent of the number of rainy days can be observed, with its value of 6 days. The number of sun hours (without clouds) descents similarly to the previous month, its value is 7 hours.
November weather
The number of rainy days reaches its minimum, with its value of 5 days in Rapid City, SD, while the rainfall amount descent's start could be observed in this month. The dry season slowly starts. The day temperature descents similarly to the previous month, with its value being 9 °C (48 °F), and the night temperature continues to descent too, with its value of -4 °C (24 °F). The descent of the number of sun hours (without clouds) can be observed, the value of this measure is 5 hours.
December weather
The day temperature is on its minimum, with its value of 4 °C (39 °F) in Rapid City, SD, while the night temperature continues to descent. The dry season is close to its peak. The humidity reaches its maximum, its value is 65 %. The number of sun hours (without clouds) reaches its minimum in December. The day length is on its minimum in December.
FAQs
What is the air temperature in February in Rapid City, SD at night?
The average night temperature in Rapid City, SD in February is -9 °C (16 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.
How humid is Rapid City, SD in April?
In April in Rapid City, SD, expect humidity around 59 %.
How windy is it in Rapid City, SD in May?
In Rapid City, SD in May, there will be an average wind scale of 5.
What is the temperature in Rapid City, SD during the day in June?
In Rapid City, SD in June, the average daily temperatures will be 25 °C (78 °F). The ideal temperature for enjoying sunbathing by the water and a good temperature for other activities. For some people, it will be too hot in the direct sunlight and the stay may not be so pleasant. This value is 6 °C (43 °F) higher than last month. Don't forget to pack flip-flops, sunscreen, and a hand fan if necessary - it may come in handy.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.Is there a wet season in July in Rapid City, SD?
No, there is no wet season in Rapid City, SD in July - you can expect 10 days of rain during the month.
Is it hot in August in Rapid City, SD?
In August in Rapid City, SD, you will enjoy nice warm weather, but it will also be pleasant and you probably won't feel hot.
Are there good conditions to visit in September in Rapid City, SD?
September is a good month to visit Rapid City, SD. There are only 7 days of rain in the whole month, so you can leave your umbrella at home. There are some people, who may feel a slight chill at 24 °C (75 °F), but others will feel perfectly fine. The temperature of 8 °C (47 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
How many hours of sun to expect in Rapid City, SD in October?
In Rapid City, SD in October, you can expect around 7 hours of sunshine.
Is there a dry season in November in Rapid City, SD?
Yes, there is a dry season in November in Rapid City, SD with just 5 days during the month being rainy.
What is the average number of rainy days in Rapid City, SD in December?
There are 6 days, which are rainy in Rapid City, SD in December, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 1.3 days of the week, or in general - 18 % days.
We make the most from 40 years of historical weather data to predict the best weather conditions.
Deciding on where to go for a holiday is hard sometimes. Get inspired by the most popular destinations.
We aggregate data from combining multiple weather sources to ensure accuracy of the highest order.