Sioux Falls, SD 14-Day Forecast
South Dakota, United States 🇺🇸
88°
Sunny right now
Today: high 88°, low 58°
Updated 9 min ago
Sioux Falls weather for the next 14 days
Thursday, August 27
Sunny High 90° Low 63°Precipitation
1%
· 0.0 in
Max wind
9 mph
Humidity
32%
UV index
7 - High
Sunrise / sunset
06:45 AM / 08:11 PM
Friday, August 28
Sunny High 89° Low 64°Precipitation
57%
· 0.07 in
Max wind
17 mph
Humidity
48%
UV index
7 - High
Sunrise / sunset
06:46 AM / 08:09 PM
Saturday, August 29
Light rain shower High 100° Low 64°Precipitation
57%
· 0.14 in
Max wind
18 mph
Humidity
54%
UV index
9 - Very High
Sunrise / sunset
06:47 AM / 08:08 PM
Sunday, August 30
Overcast High 95° Low 65°Precipitation
17%
· 0.0 in
Max wind
15 mph
Humidity
44%
UV index
8 - Very High
Sunrise / sunset
06:48 AM / 08:06 PM
Monday, August 31
Overcast High 88° Low 74°Precipitation
36%
· 0.01 in
Max wind
17 mph
Humidity
44%
UV index
8 - Very High
Sunrise / sunset
06:49 AM / 08:04 PM
Tuesday, September 1
Overcast High 90° Low 72°Precipitation
8%
· 0.0 in
Max wind
10 mph
Humidity
44%
UV index
8 - Very High
Sunrise / sunset
06:50 AM / 08:02 PM
Wednesday, September 2
Sunny High 100° Low 70°Precipitation
57%
· 0.1 in
Max wind
11 mph
Humidity
58%
UV index
8 - Very High
Sunrise / sunset
06:51 AM / 08:01 PM
Thursday, September 3
Overcast High 97° Low 72°Precipitation
57%
· 0.1 in
Max wind
12 mph
Humidity
56%
UV index
9 - Very High
Sunrise / sunset
06:52 AM / 07:59 PM
Friday, September 4
Overcast High 96° Low 77°Precipitation
7%
· 0.0 in
Max wind
15 mph
Humidity
43%
UV index
8 - Very High
Sunrise / sunset
06:54 AM / 07:57 PM
Saturday, September 5
Overcast High 96° Low 71°Precipitation
9%
· 0.0 in
Max wind
14 mph
Humidity
54%
UV index
9 - Very High
Sunrise / sunset
06:55 AM / 07:55 PM
Sunday, September 6
Sunny High 94° Low 64°Precipitation
57%
· 0.06 in
Max wind
22 mph
Humidity
55%
UV index
8 - Very High
Sunrise / sunset
06:56 AM / 07:54 PM
Monday, September 7
Light rain shower High 59° Low 47°Precipitation
85%
· 0.31 in
Max wind
15 mph
Humidity
83%
UV index
3 - Moderate
Sunrise / sunset
06:57 AM / 07:52 PM
Tuesday, September 8
Overcast High 57° Low 44°Precipitation
59%
· 0.09 in
Max wind
16 mph
Humidity
67%
UV index
3 - Moderate
Sunrise / sunset
06:58 AM / 07:50 PM
Sioux Falls 14-day outlook: the story
The warmest day of Sioux Falls's 14-day outlook is Saturday, August 29 with a high near 100°F (38°C); the coolest night comes Tuesday, September 8, dipping to 44°F (7°C). The trend points cooler: week two runs about 6°F below week one. Highs over the next two weeks average 91°F (33°C), about 10°F (6°C) above the typical August high of 81°F (27°C).
Precipitation is most likely on Friday 28, Saturday 29, Wednesday 2, Thursday 3 and beyond; the wettest day looks like Monday, September 7 with about 0.31 in (7.8 mm) expected. For the weekend, expect Saturday 100°F (38°C) and light rain shower / Sunday 95°F (35°C) and overcast.
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 Monday, September 7.
What will be the warmest day in Sioux Falls over the next 14 days?
Saturday, August 29, with a forecast high near 100°F (38°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% |