Sioux Falls, SD 14-Day Forecast
South Dakota, United States 🇺🇸
91°
Sunny right now
Today: high 94°, low 71°
Updated 5 hours ago
Sioux Falls weather for the next 14 days
Thursday, August 13
Partly Cloudy High 87° Low 64°Precipitation
67%
· 0.26 in
Max wind
15 mph
Humidity
69%
UV index
6 - Moderate
Sunrise / sunset
06:29 AM / 08:33 PM
Friday, August 14
Patchy rain nearby High 73° Low 65°Precipitation
75%
· 0.04 in
Max wind
12 mph
Humidity
93%
UV index
6 - High
Sunrise / sunset
06:30 AM / 08:32 PM
Saturday, August 15
Fog High 74° Low 68°Precipitation
85%
· 0.15 in
Max wind
10 mph
Humidity
96%
UV index
6 - Moderate
Sunrise / sunset
06:31 AM / 08:30 PM
Sunday, August 16
Sunny High 88° Low 60°Precipitation
6%
· 0.0 in
Max wind
10 mph
Humidity
61%
UV index
8 - Very High
Sunrise / sunset
06:32 AM / 08:29 PM
Monday, August 17
Sunny High 90° Low 63°Precipitation
6%
· 0.0 in
Max wind
14 mph
Humidity
66%
UV index
8 - Very High
Sunrise / sunset
06:34 AM / 08:27 PM
Tuesday, August 18
Sunny High 93° Low 66°Precipitation
57%
· 0.19 in
Max wind
12 mph
Humidity
64%
UV index
8 - Very High
Sunrise / sunset
06:35 AM / 08:26 PM
Wednesday, August 19
Sunny High 103° Low 66°Precipitation
36%
· 0.02 in
Max wind
16 mph
Humidity
65%
UV index
9 - Very High
Sunrise / sunset
06:36 AM / 08:24 PM
Thursday, August 20
Sunny High 87° Low 63°Precipitation
7%
· 0.0 in
Max wind
16 mph
Humidity
62%
UV index
8 - Very High
Sunrise / sunset
06:37 AM / 08:23 PM
Friday, August 21
Partly Cloudy High 79° Low 59°Precipitation
47%
· 0.04 in
Max wind
15 mph
Humidity
73%
UV index
7 - High
Sunrise / sunset
06:38 AM / 08:21 PM
Saturday, August 22
Sunny High 87° Low 54°Precipitation
6%
· 0.0 in
Max wind
10 mph
Humidity
67%
UV index
8 - Very High
Sunrise / sunset
06:39 AM / 08:19 PM
Sunday, August 23
Partly Cloudy High 66° Low 61°Precipitation
74%
· 0.08 in
Max wind
12 mph
Humidity
92%
UV index
5 - Moderate
Sunrise / sunset
06:40 AM / 08:18 PM
Monday, August 24
Overcast High 74° Low 60°Precipitation
79%
· 0.21 in
Max wind
10 mph
Humidity
79%
UV index
6 - High
Sunrise / sunset
06:41 AM / 08:16 PM
Tuesday, August 25
Sunny High 80° Low 59°Precipitation
60%
· 0.1 in
Max wind
9 mph
Humidity
75%
UV index
7 - High
Sunrise / sunset
06:42 AM / 08:14 PM
Sioux Falls 14-day outlook: the story
The warmest day of Sioux Falls's 14-day outlook is Wednesday, August 19 with a high near 103°F (40°C); the coolest night comes Saturday, August 22, dipping to 54°F (12°C). The trend points cooler: week two runs about 3°F below week one. Highs over the next two weeks average 86°F (30°C), about 5°F (3°C) above the typical August high of 81°F (27°C).
Precipitation is most likely on Thursday 13, Friday 14, Saturday 15, Tuesday 18 and beyond; the wettest day looks like Thursday, August 13 with about 0.26 in (6.6 mm) expected. For the weekend, expect Saturday 74°F (23°C) and fog / Sunday 88°F (31°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 Thursday, August 13.
What will be the warmest day in Sioux Falls over the next 14 days?
Wednesday, August 19, with a forecast high near 103°F (40°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