Rapid City, SD 14-Day Forecast
South Dakota, United States 🇺🇸
92°
Sunny right now
Today: high 96°, low 60°
Updated 2 min ago
Rapid City weather for the next 14 days
Friday, August 7
Sunny High 91° Low 61°Precipitation
1%
· 0.0 in
Max wind
17 mph
Humidity
25%
UV index
7 - High
Sunrise / sunset
05:47 AM / 08:09 PM
Saturday, August 8
Sunny High 99° Low 64°Precipitation
1%
· 0.0 in
Max wind
12 mph
Humidity
25%
UV index
7 - High
Sunrise / sunset
05:48 AM / 08:08 PM
Sunday, August 9
Sunny High 94° Low 68°Precipitation
1%
· 0.0 in
Max wind
20 mph
Humidity
35%
UV index
8 - High
Sunrise / sunset
05:49 AM / 08:06 PM
Monday, August 10
Sunny High 91° Low 62°Precipitation
57%
· 0.1 in
Max wind
17 mph
Humidity
54%
UV index
8 - Very High
Sunrise / sunset
05:51 AM / 08:05 PM
Tuesday, August 11
Sunny High 96° Low 63°Precipitation
4%
· 0.0 in
Max wind
19 mph
Humidity
55%
UV index
9 - Very High
Sunrise / sunset
05:52 AM / 08:04 PM
Wednesday, August 12
Sunny High 92° Low 63°Precipitation
17%
· 0.01 in
Max wind
22 mph
Humidity
63%
UV index
8 - Very High
Sunrise / sunset
05:53 AM / 08:02 PM
Thursday, August 13
Light rain shower High 73° Low 62°Precipitation
76%
· 0.23 in
Max wind
12 mph
Humidity
77%
UV index
5 - Moderate
Sunrise / sunset
05:54 AM / 08:01 PM
Friday, August 14
Patchy rain nearby High 78° Low 60°Precipitation
76%
· 0.23 in
Max wind
11 mph
Humidity
78%
UV index
6 - High
Sunrise / sunset
05:55 AM / 07:59 PM
Saturday, August 15
Partly Cloudy High 66° Low 58°Precipitation
57%
· 0.05 in
Max wind
16 mph
Humidity
73%
UV index
5 - Moderate
Sunrise / sunset
05:56 AM / 07:58 PM
Sunday, August 16
Patchy rain nearby High 65° Low 57°Precipitation
36%
· 0.01 in
Max wind
12 mph
Humidity
76%
UV index
5 - Moderate
Sunrise / sunset
05:57 AM / 07:56 PM
Monday, August 17
Sunny High 92° Low 62°Precipitation
7%
· 0.0 in
Max wind
25 mph
Humidity
58%
UV index
8 - Very High
Sunrise / sunset
05:59 AM / 07:54 PM
Tuesday, August 18
Sunny High 85° Low 70°Precipitation
2%
· 0.0 in
Max wind
24 mph
Humidity
43%
UV index
7 - High
Sunrise / sunset
06:00 AM / 07:53 PM
Wednesday, August 19
Sunny High 88° Low 67°Precipitation
4%
· 0.0 in
Max wind
26 mph
Humidity
22%
UV index
8 - Very High
Sunrise / sunset
06:01 AM / 07:51 PM
Rapid City 14-day outlook: the story
The warmest day of Rapid City's 14-day outlook is Saturday, August 8 with a high near 99°F (37°C); the coolest night comes Sunday, August 16, dipping to 57°F (14°C). The trend points cooler: week two runs about 16°F below week one. Highs over the next two weeks average 94°F (35°C), about 11°F (6°C) above the typical August high of 83°F (28°C).
Precipitation is most likely on Monday 10, Thursday 13, Friday 14, Saturday 15; the wettest day looks like Friday, August 14 with about 0.23 in (5.9 mm) expected. For the weekend, expect Saturday 99°F (37°C) and sunny / Sunday 94°F (34°C) and sunny.
For typical conditions month by month, see the Rapid City climate & average temperatures guide.
Rapid City forecast questions
Will it rain in Rapid City this week?
The forecast currently shows meaningful precipitation chances on 4 of the next 14 days, peaking around Friday, August 14.
What will be the warmest day in Rapid City over the next 14 days?
Saturday, August 8, with a forecast high near 99°F (37°C).
How accurate is a 14-day forecast for Rapid City?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Rapid City by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 37° | 18° | 4 | 0.5 in | 7.2 h/day | 62% |
| February | 37° | 17° | 6 | 0.9 in | 8.2 h/day | 58% |
| March | 47° | 26° | 6 | 1.1 in | 9.3 h/day | 58% |
| April | 55° | 33° | 9 | 2.4 in | 10.2 h/day | 58% |
| May | 65° | 45° | 12 | 3.4 in | 10.9 h/day | 61% |
| June | 80° | 58° | 9 | 2.6 in | 13.1 h/day | 55% |
| July | 86° | 63° | 8 | 1.6 in | 13.5 h/day | 52% |
| August | 83° | 61° | 6 | 1.6 in | 12.6 h/day | 52% |
| September | 76° | 54° | 5 | 1.1 in | 10.6 h/day | 52% |
| October | 60° | 40° | 6 | 1.5 in | 8.9 h/day | 55% |
| November | 48° | 29° | 4 | 0.6 in | 7.7 h/day | 55% |
| December | 37° | 20° | 5 | 0.9 in | 6.8 h/day | 61% |
14-day forecasts nearby