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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
12.2 km/h WSW
Wind
20.2 km/h 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

If you head out in Sioux Falls today, you'll see a overcast sky. 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 (km/h)
WNW
14
NW
11
NNW
10
NNE
10
NNE
9
NNE
9
N
12
NNE
8
NNE
12
NNE
8
NNE
8
E
5
NE
7
NE
11
ENE
12
NE
12
ENE
14
N
10
NE
13
NE
10
NE
12
NNE
13
NNE
17
NE
14
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 (km/h)
19
17
27
21
23
23
19
30
14
29
34
31
27
26
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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