Sioux Falls weather live forecast

Today's maximum temperature in Sioux Falls is expected to be 28°C. Select a day from the live weather forecast for Sioux Falls, South Dakota, USA for more weather parameters.

Tuesday
18th Aug
28

19

7

6
Wednesday
19th Aug
27

17

6

5
Thursday
20th Aug
30

18

8

7
Friday
21st Aug
30

17

7

7
Saturday
22nd Aug
26

16

12

7

5-day weather forecast updated at 04:01 on Tuesday 18th August 2026 GMT

More about Sioux Falls

Sioux Falls by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for South Dakota

Intrepid Travel discount code: £200 off small group tours

Discount Code

Save EXTRA £200 on select small group tours worldwide
Min spend of £1,500 per person. T&Cs apply
Travel before 30th June 2027 (inclusive)

Show discount code

******011

Redeem Intrepid Travel discount code >>

Expires at 23:59 on Monday 31st Aug 2026 · View all Intrepid Travel offers

The 5-day weather forecast for South Dakota (Sioux Falls) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Sioux Falls weather forecast by day

Below are the detailed weather forecasts for Sioux Falls for the next 5 days.

Sioux Falls weather for Tuesday 18th August 2026

Expect isolated thunderstorms in Sioux Falls, South Dakota with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 34% chance of some rain and a light breeze of 12 kph from the north.

28
°C maximum temperature
19
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
6
UV index (High)
34
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
12
kph wind from N

Sioux Falls weather for Wednesday 19th August 2026

Expect broken clouds in Sioux Falls, South Dakota with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

27
°C maximum temperature
17
°C minimum temperature
broken clouds
6
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
11
kph wind from S

Sioux Falls weather for Thursday 20th August 2026

Expect isolated thunderstorms in Sioux Falls, South Dakota with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a moderate breeze of 20 kph from the south.

30
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
8
hours of sunshine
7
UV index (High)
40
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from S

Sioux Falls weather for Friday 21st August 2026

Expect broken clouds in Sioux Falls, South Dakota with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north.

30
°C maximum temperature
17
°C minimum temperature
broken clouds
7
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
15
kph wind from N

Sioux Falls weather for Saturday 22nd August 2026

Expect clear skies in Sioux Falls, South Dakota with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north-east.