Rapid City, SD 14-Day Forecast
South Dakota, United States 🇺🇸
80°
Partly Cloudy right now
Today: high 86°, low 61°
Updated 1 hour ago
Rapid City weather for the next 14 days
Thursday, August 27
Sunny High 91° Low 64°Precipitation
17%
· 0.01 in
Max wind
13 mph
Humidity
42%
UV index
7 - High
Sunrise / sunset
06:10 AM / 07:38 PM
Friday, August 28
Overcast High 96° Low 72°Precipitation
6%
· 0.0 in
Max wind
14 mph
Humidity
39%
UV index
9 - Very High
Sunrise / sunset
06:11 AM / 07:36 PM
Saturday, August 29
Overcast High 98° Low 67°Precipitation
17%
· 0.01 in
Max wind
20 mph
Humidity
39%
UV index
8 - Very High
Sunrise / sunset
06:12 AM / 07:34 PM
Sunday, August 30
Overcast High 90° Low 62°Precipitation
36%
· 0.03 in
Max wind
15 mph
Humidity
41%
UV index
7 - High
Sunrise / sunset
06:13 AM / 07:33 PM
Monday, August 31
Overcast High 84° Low 66°Precipitation
7%
· 0.0 in
Max wind
18 mph
Humidity
28%
UV index
7 - High
Sunrise / sunset
06:15 AM / 07:31 PM
Tuesday, September 1
Overcast High 90° Low 64°Precipitation
3%
· 0.0 in
Max wind
16 mph
Humidity
26%
UV index
8 - Very High
Sunrise / sunset
06:16 AM / 07:29 PM
Wednesday, September 2
Sunny High 94° Low 69°Precipitation
3%
· 0.0 in
Max wind
17 mph
Humidity
21%
UV index
7 - High
Sunrise / sunset
06:17 AM / 07:27 PM
Thursday, September 3
Sunny High 92° Low 65°Precipitation
1%
· 0.0 in
Max wind
20 mph
Humidity
16%
UV index
8 - Very High
Sunrise / sunset
06:18 AM / 07:26 PM
Friday, September 4
Sunny High 76° Low 50°Precipitation
2%
· 0.0 in
Max wind
22 mph
Humidity
34%
UV index
6 - High
Sunrise / sunset
06:19 AM / 07:24 PM
Saturday, September 5
Sunny High 93° Low 50°Precipitation
3%
· 0.0 in
Max wind
15 mph
Humidity
35%
UV index
8 - Very High
Sunrise / sunset
06:20 AM / 07:22 PM
Sunday, September 6
Overcast High 74° Low 54°Precipitation
9%
· 0.0 in
Max wind
25 mph
Humidity
40%
UV index
6 - High
Sunrise / sunset
06:21 AM / 07:20 PM
Monday, September 7
Sunny High 69° Low 45°Precipitation
4%
· 0.0 in
Max wind
10 mph
Humidity
56%
UV index
6 - High
Sunrise / sunset
06:23 AM / 07:18 PM
Tuesday, September 8
Sunny High 64° Low 44°Precipitation
17%
· 0.01 in
Max wind
16 mph
Humidity
58%
UV index
5 - Moderate
Sunrise / sunset
06:24 AM / 07:17 PM
Rapid City 14-day outlook: the story
The warmest day of Rapid City's 14-day outlook is Saturday, August 29 with a high near 98°F (37°C); the coolest night comes Tuesday, September 8, dipping to 44°F (6°C). The trend points cooler: week two runs about 11°F below week one. Highs over the next two weeks average 91°F (33°C), about 8°F (4°C) above the typical August high of 83°F (28°C).
No day in the outlook currently carries a strong precipitation signal. For the weekend, expect Saturday 98°F (37°C) and overcast / Sunday 90°F (32°C) and overcast.
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?
No day in the current 14-day outlook shows a strong rain signal for Rapid City.
What will be the warmest day in Rapid City over the next 14 days?
Saturday, August 29, with a forecast high near 98°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