Rapid City, SD 14-Day Forecast
South Dakota, United States 🇺🇸
85°
Sunny right now
Today: high 87°, low 61°
Updated 5 hours ago
Rapid City weather for the next 14 days
Thursday, August 13
Partly Cloudy High 78° Low 64°Precipitation
17%
· 0.0 in
Max wind
15 mph
Humidity
62%
UV index
7 - High
Sunrise / sunset
05:54 AM / 08:01 PM
Friday, August 14
Sunny High 85° Low 63°Precipitation
36%
· 0.03 in
Max wind
17 mph
Humidity
58%
UV index
8 - Very High
Sunrise / sunset
05:55 AM / 07:59 PM
Saturday, August 15
Patchy rain nearby High 75° Low 63°Precipitation
75%
· 0.33 in
Max wind
8 mph
Humidity
73%
UV index
7 - High
Sunrise / sunset
05:56 AM / 07:58 PM
Sunday, August 16
Sunny High 88° Low 59°Precipitation
3%
· 0.0 in
Max wind
16 mph
Humidity
59%
UV index
8 - Very High
Sunrise / sunset
05:57 AM / 07:56 PM
Monday, August 17
Sunny High 90° Low 66°Precipitation
57%
· 0.07 in
Max wind
8 mph
Humidity
51%
UV index
8 - Very High
Sunrise / sunset
05:59 AM / 07:54 PM
Tuesday, August 18
Patchy rain nearby High 88° Low 65°Precipitation
36%
· 0.04 in
Max wind
7 mph
Humidity
46%
UV index
8 - Very High
Sunrise / sunset
06:00 AM / 07:53 PM
Wednesday, August 19
Sunny High 93° Low 70°Precipitation
1%
· 0.0 in
Max wind
19 mph
Humidity
35%
UV index
8 - Very High
Sunrise / sunset
06:01 AM / 07:51 PM
Thursday, August 20
Patchy rain nearby High 83° Low 65°Precipitation
57%
· 0.13 in
Max wind
15 mph
Humidity
47%
UV index
7 - High
Sunrise / sunset
06:02 AM / 07:50 PM
Friday, August 21
Patchy rain nearby High 84° Low 66°Precipitation
36%
· 0.03 in
Max wind
16 mph
Humidity
59%
UV index
7 - High
Sunrise / sunset
06:03 AM / 07:48 PM
Saturday, August 22
Sunny High 87° Low 64°Precipitation
64%
· 1.38 in
Max wind
16 mph
Humidity
55%
UV index
8 - Very High
Sunrise / sunset
06:04 AM / 07:46 PM
Sunday, August 23
Patchy rain nearby High 66° Low 58°Precipitation
82%
· 0.28 in
Max wind
12 mph
Humidity
84%
UV index
5 - Moderate
Sunrise / sunset
06:05 AM / 07:45 PM
Monday, August 24
Sunny High 76° Low 55°Precipitation
58%
· 0.12 in
Max wind
7 mph
Humidity
70%
UV index
6 - High
Sunrise / sunset
06:07 AM / 07:43 PM
Tuesday, August 25
Patchy rain nearby High 74° Low 59°Precipitation
61%
· 0.07 in
Max wind
6 mph
Humidity
74%
UV index
6 - High
Sunrise / sunset
06:08 AM / 07:41 PM
Rapid City 14-day outlook: the story
The warmest day of Rapid City's 14-day outlook is Wednesday, August 19 with a high near 93°F (34°C); the coolest night comes Monday, August 24, dipping to 55°F (13°C). The trend points cooler: week two runs about 4°F below week one. Highs over the next two weeks average 84°F (29°C), right in line with the typical August high of 83°F (28°C).
Precipitation is most likely on Wednesday 12, Saturday 15, Monday 17, Thursday 20 and beyond; the wettest day looks like Saturday, August 22 with about 1.38 in (35.0 mm) expected. For the weekend, expect Saturday 75°F (24°C) and patchy rain nearby / Sunday 88°F (31°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 8 of the next 14 days, peaking around Saturday, August 22.
What will be the warmest day in Rapid City over the next 14 days?
Wednesday, August 19, with a forecast high near 93°F (34°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