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Weather Sioux Falls: Current forecast

Sioux Falls / South Dakota (SD) / United States

34.9 °C
Feels like 32.7 °C
Min 21 °C / Max 35 °C
Weather Sioux Falls: Overcast, 35 °C Overcast
7.6 mph WSW
Wind
12.6 mph WSW
Gusts
1007 hPa
Pressure
0 mm
Precipitation
23 %
Humidity
5.7
UV index

Pollen (today)

Hazel None
Alder None
Birch None
Oak None
Grass Moderate
Mugwort Moderate
Ragweed High
06:49 / 20:04
Sunrise / Sunset
21:19 / 10:36
Moonrise / Moonset
Waning Moon (80 %)
Moon phase

Updated: Aug 31, 2026, 22:20 CEST Aug 31, 2026, 15:20 CDT

Today's Summary

Right now Sioux Falls has overcast weather. The thermometer currently shows 34.9°C. Stay in the shade, wear light clothing and drink lots of water. During the day temperatures will range between 21.1°C and 35°C.

Hourly forecast – Sioux Falls, today

Aug 31, 17:00
32 °C
Patchy rain possible
Sioux Falls Aug 31, 17:00: Patchy rain possible, 32 °C
Aug 31, 18:00
32 °C
Overcast
Sioux Falls Aug 31, 18:00: Overcast, 32 °C
Aug 31, 19:00
30 °C
Partly cloudy
Sioux Falls Aug 31, 19:00: Partly cloudy, 30 °C
Aug 31, 20:00
28 °C
Clear
Sioux Falls Aug 31, 20:00: Clear, 28 °C
Aug 31, 21:00
26 °C
Partly cloudy
Sioux Falls Aug 31, 21:00: Partly cloudy, 26 °C
Aug 31, 22:00
26 °C
Cloudy
Sioux Falls Aug 31, 22:00: Cloudy, 26 °C
Aug 31, 23:00
26 °C
Overcast
Sioux Falls Aug 31, 23:00: Overcast, 26 °C
Sep 1, 00:00
25 °C
Partly cloudy
Sioux Falls Sep 1, 00:00: Partly cloudy, 25 °C
Sep 1, 01:00
25 °C
Overcast
Sioux Falls Sep 1, 01:00: Overcast, 25 °C
Sep 1, 02:00
24 °C
Overcast
Sioux Falls Sep 1, 02:00: Overcast, 24 °C
Sep 1, 03:00
24 °C
Overcast
Sioux Falls Sep 1, 03:00: Overcast, 24 °C
Sep 1, 04:00
25 °C
Overcast
Sioux Falls Sep 1, 04:00: Overcast, 25 °C
Sep 1, 05:00
25 °C
Overcast
Sioux Falls Sep 1, 05:00: Overcast, 25 °C
Sep 1, 06:00
26 °C
Overcast
Sioux Falls Sep 1, 06:00: Overcast, 26 °C
Sep 1, 07:00
25 °C
Overcast
Sioux Falls Sep 1, 07:00: Overcast, 25 °C
Sep 1, 08:00
27 °C
Overcast
Sioux Falls Sep 1, 08:00: Overcast, 27 °C
Sep 1, 09:00
28 °C
Overcast
Sioux Falls Sep 1, 09:00: Overcast, 28 °C
Sep 1, 10:00
27 °C
Overcast
Sioux Falls Sep 1, 10:00: Overcast, 27 °C
Sep 1, 11:00
26 °C
Overcast
Sioux Falls Sep 1, 11:00: Overcast, 26 °C
Sep 1, 12:00
30 °C
Patchy rain possible
Sioux Falls Sep 1, 12:00: Patchy rain possible, 30 °C
Sep 1, 13:00
31 °C
Patchy rain possible
Sioux Falls Sep 1, 13:00: Patchy rain possible, 31 °C
Sep 1, 14:00
31 °C
Patchy rain possible
Sioux Falls Sep 1, 14:00: Patchy rain possible, 31 °C
Sep 1, 15:00
31 °C
Patchy rain possible
Sioux Falls Sep 1, 15:00: Patchy rain possible, 31 °C
Sep 1, 16:00
29 °C
Patchy rain possible
Sioux Falls Sep 1, 16:00: Patchy rain possible, 29 °C
Time
17
18
19
20
21
22
23
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
Sioux Falls Aug 31, 17:00: Patchy rain possible
Sioux Falls Aug 31, 18:00: Overcast
Sioux Falls Aug 31, 19:00: Partly cloudy
Sioux Falls Aug 31, 20:00: Clear
Sioux Falls Aug 31, 21:00: Partly cloudy
Sioux Falls Aug 31, 22:00: Cloudy
Sioux Falls Aug 31, 23:00: Overcast
Sioux Falls Sep 1, 00:00: Partly cloudy
Sioux Falls Sep 1, 01:00: Overcast
Sioux Falls Sep 1, 02:00: Overcast
Sioux Falls Sep 1, 03:00: Overcast
Sioux Falls Sep 1, 04:00: Overcast
Sioux Falls Sep 1, 05:00: Overcast
Sioux Falls Sep 1, 06:00: Overcast
Sioux Falls Sep 1, 07:00: Overcast
Sioux Falls Sep 1, 08:00: Overcast
Sioux Falls Sep 1, 09:00: Overcast
Sioux Falls Sep 1, 10:00: Overcast
Sioux Falls Sep 1, 11:00: Overcast
Sioux Falls Sep 1, 12:00: Patchy rain possible
Sioux Falls Sep 1, 13:00: Patchy rain possible
Sioux Falls Sep 1, 14:00: Patchy rain possible
Sioux Falls Sep 1, 15:00: Patchy rain possible
Sioux Falls Sep 1, 16:00: Patchy rain possible
Temperature (°C)
Chance of rain (%)
9
10
3
2
6
13
15
8
13
14
14
12
12
10
8
9
9
9
9
12
17
17
7
17
Precipitation
0 mm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
0 mm
0.1 mm
0.1 mm
0 mm
0.1 mm
Wind (mph)
WNW
9
NW
7
NNW
6
NNE
6
NNE
5
NNE
6
N
7
NNE
5
NNE
8
NNE
5
NNE
5
E
3
NE
4
NE
7
ENE
7
NE
7
ENE
9
N
6
NE
8
NE
6
NE
8
NNE
8
NNE
10
NE
9
Pressure (hPa)
1006
1007
1008
1008
1009
1009
1009
1009
1009
1010
1010
1011
1010
1010
1010
1010
1010
1012
1011
1011
1010
1010
1009
1009
Humidity (%)
27 %
36 %
40 %
49 %
60 %
64 %
63 %
63 %
61 %
60 %
58 %
53 %
50 %
46 %
32 %
26 %
24 %
26 %
28 %
24 %
24 %
27 %
28 %
34 %
Cloud cover (%)
95 %
100 %
45 %
11 %
44 %
87 %
98 %
52 %
93 %
97 %
100 %
100 %
100 %
98 %
89 %
100 %
100 %
100 %
100 %
99 %
88 %
54 %
72 %
78 %

14-day weather forecast – Sioux Falls

14-day trend for Sioux Falls: Temperatures stay fairly stable over the period with no big swings. Lows can drop to around 11.2°C at night, with daytime highs up to 40.3°C.

Date
Aug 31
Sep 1
Sep 2
Sep 3
Sep 4
Sep 5
Sep 6
Sep 7
Sep 8
Sep 9
Sep 10
Sep 11
Sep 12
Sep 13
Sioux Falls August 31, 2026: Overcast
Sioux Falls September 1, 2026: Overcast
Sioux Falls September 2, 2026: Sunny
Sioux Falls September 3, 2026: Sunny
Sioux Falls September 4, 2026: Sunny
Sioux Falls September 5, 2026: Thundery outbreaks possible
Sioux Falls September 6, 2026: Sunny
Sioux Falls September 7, 2026: Sunny
Sioux Falls September 8, 2026: Sunny
Sioux Falls September 9, 2026: Sunny
Sioux Falls September 10, 2026: Sunny
Sioux Falls September 11, 2026: Sunny
Sioux Falls September 12, 2026: Sunny
Sioux Falls September 13, 2026: Sunny
Temperature (°C)
Chance of rain (%)
36
68
64
36
36
8
4
5
2
1
2
36
1
1
Precipitation
0.4 mm
6.1 mm
5.9 mm
0.4 mm
0.8 mm
0 mm
—
—
—
—
—
0.6 mm
—
—
Wind max (mph)
12
11
17
13
14
15
12
19
9
18
21
19
17
16
Date Weather Min °C Max °C Sunrise Sunset Moonrise Moonset Moon phase
August 31, 2026 Sioux Falls August 31, 2026: Overcast Overcast 21 °C 35 °C 06:49 20:04 21:19 10:36 Waning Moon (80 %)
September 1, 2026 Sioux Falls September 1, 2026: Overcast Overcast 22 °C 31 °C 06:50 20:02 21:42 11:45 Waning Moon (70 %)
September 2, 2026 Sioux Falls September 2, 2026: Sunny Sunny 19 °C 33 °C 06:51 20:01 22:12 12:56 Last Quarter (60 %)
September 3, 2026 Sioux Falls September 3, 2026: Sunny Sunny 23 °C 36 °C 06:52 19:59 22:50 14:08 Last Quarter (50 %)
September 4, 2026 Sioux Falls September 4, 2026: Sunny Sunny 22 °C 36 °C 06:54 19:57 23:40 15:19 Last Quarter (39 %)
September 5, 2026 Sioux Falls September 5, 2026: Thundery outbreaks possible Thundery outbreaks possible 24 °C 35 °C 06:55 19:55 Does not rise today 16:23 Waning Crescent (29 %)
September 6, 2026 Sioux Falls September 6, 2026: Sunny Sunny 21 °C 35 °C 06:56 19:54 00:44 17:16 Waning Crescent (20 %)
September 7, 2026 Sioux Falls September 7, 2026: Sunny Sunny 23 °C 35 °C 06:57 19:52 01:58 17:59 Waning Crescent (12 %)
September 8, 2026 Sioux Falls September 8, 2026: Sunny Sunny 20 °C 36 °C 06:58 19:50 03:20 18:33 Waning Crescent (6 %)
September 9, 2026 Sioux Falls September 9, 2026: Sunny Sunny 22 °C 38 °C 06:59 19:48 04:44 19:01 New Moon (2 %)
September 10, 2026 Sioux Falls September 10, 2026: Sunny Sunny 20 °C 40 °C 07:00 19:46 06:06 19:24 New Moon (0 %)
September 11, 2026 Sioux Falls September 11, 2026: Sunny Sunny 11 °C 25 °C 07:01 19:45 07:26 19:47 New Moon (0 %)
September 12, 2026 Sioux Falls September 12, 2026: Sunny Sunny 16 °C 33 °C 07:03 19:43 08:44 20:09 New Moon (3 %)
September 13, 2026 Sioux Falls September 13, 2026: Sunny Sunny 25 °C 36 °C 07:04 19:41 10:01 20:33 Waxing Crescent (8 %)
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