Sioux Falls, SD 14-Day Forecast
South Dakota, United States 🇺🇸
86°
Sunny right now
Today: high 89°, low 54°
Updated 2 min ago
Sioux Falls weather for the next 14 days
Friday, August 7
Sunny High 94° Low 65°Precipitation
36%
· 0.03 in
Max wind
17 mph
Humidity
49%
UV index
7 - High
Sunrise / sunset
06:22 AM / 08:42 PM
Saturday, August 8
Sunny High 97° Low 62°Precipitation
57%
· 0.12 in
Max wind
16 mph
Humidity
54%
UV index
7 - High
Sunrise / sunset
06:24 AM / 08:40 PM
Sunday, August 9
Sunny High 105° Low 68°Precipitation
36%
· 0.03 in
Max wind
23 mph
Humidity
62%
UV index
7 - High
Sunrise / sunset
06:25 AM / 08:39 PM
Monday, August 10
Sunny High 92° Low 64°Precipitation
64%
· 0.3 in
Max wind
18 mph
Humidity
65%
UV index
8 - Very High
Sunrise / sunset
06:26 AM / 08:38 PM
Tuesday, August 11
Sunny High 88° Low 67°Precipitation
68%
· 0.35 in
Max wind
15 mph
Humidity
69%
UV index
8 - Very High
Sunrise / sunset
06:27 AM / 08:36 PM
Wednesday, August 12
Sunny High 92° Low 66°Precipitation
59%
· 0.25 in
Max wind
12 mph
Humidity
64%
UV index
8 - Very High
Sunrise / sunset
06:28 AM / 08:35 PM
Thursday, August 13
Sunny High 85° Low 64°Precipitation
36%
· 0.02 in
Max wind
15 mph
Humidity
63%
UV index
7 - High
Sunrise / sunset
06:29 AM / 08:33 PM
Friday, August 14
Sunny High 74° Low 64°Precipitation
57%
· 0.04 in
Max wind
14 mph
Humidity
71%
UV index
6 - High
Sunrise / sunset
06:30 AM / 08:32 PM
Saturday, August 15
Overcast High 81° Low 59°Precipitation
16%
· 0.0 in
Max wind
11 mph
Humidity
71%
UV index
7 - High
Sunrise / sunset
06:31 AM / 08:30 PM
Sunday, August 16
Partly Cloudy High 76° Low 58°Precipitation
57%
· 0.05 in
Max wind
9 mph
Humidity
69%
UV index
6 - High
Sunrise / sunset
06:32 AM / 08:29 PM
Monday, August 17
Partly Cloudy High 82° Low 56°Precipitation
6%
· 0.0 in
Max wind
16 mph
Humidity
62%
UV index
7 - High
Sunrise / sunset
06:34 AM / 08:27 PM
Tuesday, August 18
Partly Cloudy High 88° Low 62°Precipitation
8%
· 0.0 in
Max wind
24 mph
Humidity
66%
UV index
8 - Very High
Sunrise / sunset
06:35 AM / 08:26 PM
Wednesday, August 19
Sunny High 95° Low 70°Precipitation
63%
· 0.33 in
Max wind
22 mph
Humidity
66%
UV index
9 - Very High
Sunrise / sunset
06:36 AM / 08:24 PM
Sioux Falls 14-day outlook: the story
The warmest day of Sioux Falls's 14-day outlook is Sunday, August 9 with a high near 105°F (41°C); the coolest night comes Thursday, August 6, dipping to 54°F (12°C). The trend points cooler: week two runs about 11°F below week one. Highs over the next two weeks average 94°F (34°C), about 13°F (7°C) above the typical August high of 81°F (27°C).
Precipitation is most likely on Saturday 8, Monday 10, Tuesday 11, Wednesday 12 and beyond; the wettest day looks like Tuesday, August 11 with about 0.35 in (8.9 mm) expected. For the weekend, expect Saturday 97°F (36°C) and sunny / Sunday 105°F (41°C) and sunny.
For typical conditions month by month, see the Sioux Falls climate & average temperatures guide.
Sioux Falls forecast questions
Will it rain in Sioux Falls this week?
The forecast currently shows meaningful precipitation chances on 7 of the next 14 days, peaking around Tuesday, August 11.
What will be the warmest day in Sioux Falls over the next 14 days?
Sunday, August 9, with a forecast high near 105°F (41°C).
How accurate is a 14-day forecast for Sioux Falls?
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 Sioux Falls by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 27° | 11° | 5 | 1.0 in | 6.1 h/day | 75% |
| February | 31° | 13° | 5 | 0.9 in | 7.9 h/day | 66% |
| March | 45° | 26° | 6 | 2.2 in | 8.3 h/day | 66% |
| April | 56° | 36° | 10 | 3.6 in | 9.2 h/day | 62% |
| May | 69° | 49° | 12 | 4.3 in | 10.3 h/day | 65% |
| June | 81° | 62° | 10 | 4.0 in | 12.8 h/day | 64% |
| July | 83° | 65° | 7 | 2.6 in | 13.2 h/day | 70% |
| August | 81° | 63° | 9 | 3.2 in | 11.4 h/day | 72% |
| September | 76° | 58° | 8 | 2.7 in | 10.1 h/day | 67% |
| October | 59° | 42° | 7 | 2.5 in | 8.0 h/day | 64% |
| November | 45° | 29° | 5 | 1.5 in | 6.9 h/day | 68% |
| December | 33° | 18° | 6 | 1.5 in | 5.9 h/day | 73% |
14-day forecasts nearby