Rapid City weather by month

Check out Rapid City weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Rapid City (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
2°C maximum daytime temperature in January in Rapid City2
4°C maximum daytime temperature in February in Rapid City4
8°C maximum daytime temperature in March in Rapid City8
14°C maximum daytime temperature in April in Rapid City14
20°C maximum daytime temperature in May in Rapid City20
25°C maximum daytime temperature in June in Rapid City25
30°C maximum daytime temperature in July in Rapid City30
29°C maximum daytime temperature in August in Rapid City29
23°C maximum daytime temperature in September in Rapid City23
17°C maximum daytime temperature in October in Rapid City17
8°C maximum daytime temperature in November in Rapid City8
3°C maximum daytime temperature in December in Rapid City3
Min temperature (night-time)
-12°C minimum night-time temperature in January in Rapid City-12
-10°C minimum night-time temperature in February in Rapid City-10
-6°C minimum night-time temperature in March in Rapid City-6
0°C minimum night-time temperature in April in Rapid City0
6°C minimum night-time temperature in May in Rapid City6
11°C minimum night-time temperature in June in Rapid City11
15°C minimum night-time temperature in July in Rapid City15
13°C minimum night-time temperature in August in Rapid City13
7°C minimum night-time temperature in September in Rapid City7
1°C minimum night-time temperature in October in Rapid City1
-5°C minimum night-time temperature in November in Rapid City-5
-11°C minimum night-time temperature in December in Rapid City-11
Heat & Humidity
No heat & humidity in January in Rapid City0
No heat & humidity in February in Rapid City0
No heat & humidity in March in Rapid City0
No heat & humidity in April in Rapid City0
No heat & humidity in May in Rapid City0
No heat & humidity in June in Rapid City0
Moderate heat & humidity in July in Rapid CityM
Moderate heat & humidity in August in Rapid CityM
No heat & humidity in September in Rapid City0
No heat & humidity in October in Rapid City0
No heat & humidity in November in Rapid City0
No heat & humidity in December in Rapid City0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in Rapid City

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Rapid City9
10 hours of daylight per day in February in Rapid City10
12 hours of daylight per day in March in Rapid City12
14 hours of daylight per day in April in Rapid City14
15 hours of daylight per day in May in Rapid City15
15 hours of daylight per day in June in Rapid City15
15 hours of daylight per day in July in Rapid City15
14 hours of daylight per day in August in Rapid City14
12 hours of daylight per day in September in Rapid City12
11 hours of daylight per day in October in Rapid City11
10 hours of daylight per day in November in Rapid City10
9 hours of daylight per day in December in Rapid City9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Rapid City1
UV (maximum) index 2 (Low) in February in Rapid City2
UV (maximum) index 4 (Moderate) in March in Rapid City4
UV (maximum) index 5 (Moderate) in April in Rapid City5
UV (maximum) index 7 (High) in May in Rapid City7
UV (maximum) index 9 (Very High) in June in Rapid City9
UV (maximum) index 9 (Very High) in July in Rapid City9
UV (maximum) index 8 (Very High) in August in Rapid City8
UV (maximum) index 6 (High) in September in Rapid City6
UV (maximum) index 3 (Moderate) in October in Rapid City3
UV (maximum) index 2 (Low) in November in Rapid City2
UV (maximum) index 1 (Low) in December in Rapid City1

Rainfall in Rapid City

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
7 days with some rainfall in January in Rapid City7
7 days with some rainfall in February in Rapid City7
9 days with some rainfall in March in Rapid City9
10 days with some rainfall in April in Rapid City10
12 days with some rainfall in May in Rapid City12
12 days with some rainfall in June in Rapid City12
9 days with some rainfall in July in Rapid City9
8 days with some rainfall in August in Rapid City8
7 days with some rainfall in September in Rapid City7
5 days with some rainfall in October in Rapid City5
6 days with some rainfall in November in Rapid City6
7 days with some rainfall in December in Rapid City7
Average monthly rainfall (mm)
8 mm monthly rainfall in January in Rapid City8
12 mm monthly rainfall in February in Rapid City12
23 mm monthly rainfall in March in Rapid City23
50 mm monthly rainfall in April in Rapid City50
80 mm monthly rainfall in May in Rapid City80
79 mm monthly rainfall in June in Rapid City79
62 mm monthly rainfall in July in Rapid City62
48 mm monthly rainfall in August in Rapid City48
30 mm monthly rainfall in September in Rapid City30
26 mm monthly rainfall in October in Rapid City26
11 mm monthly rainfall in November in Rapid City11
10 mm monthly rainfall in December in Rapid City10

More about Rapid City

Rapid City by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Dakota

Marriott discount code: up to 20% off long hotel stays

  • Save up to 20% when you book long stays with Marriott
  • 20% off - 4-6 nights, 15% off 3 nights
  • Book participating hotels in Europe, the Middle East & Africa
Show discount codeShow discount code ******UK8
Redeem Marriott discount code >>

View all Marriott offers

The climate guide for South Dakota (Rapid City) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Rapid City?

Rapid City has a cold semi arid climate with hot summers.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about the USA

Compare Rapid City with the USA

Below the Rapid City chart shows average maximum daytime temperature for Rapid City, South Dakota, USA and the USA (Washington).

Maximum daytime temperature (°C)

Rapid City, South Dakota, USA
USA (Washington)
2
5
4
7
8
13
14
19
20
24
25
29
30
31
29
30
23
26
17
20
8
14
3
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more Rapid City weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^