UV Index Today in Sioux Falls, South Dakota (SD)

Sunday, September 20, 2026 -11:22 AM CDT (GMT-5)

The UV Index in Sioux Falls, South Dakota (SD) right now is 3. This reading was last updated at 11:00 AM CDT, about 22 minutes ago. The UV Index at12:00 PM CDT, in about 37 minutes from now, is expected to be 4.1.

The maximum UV Index today in Sioux Falls is expected to be 4.5 at 1:00 PM CDT,1 hour and 37 minutes from now. The maximum UV Index tomorrow is expected to be 1.3 at 2:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

September 20
4.5
1:00 PM CDT
Moderate

Tomorrow

September 21
1.3
2:00 PM CDT
Low

UV Index Today Hourly

September 20

Data shows Sioux Falls, South Dakota (SD)'s UV Index climbing to 4.5 today, peaking at1:00 PM CDT under Moderate conditions.

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMCentral Daylight Time (CDT, GMT-5)Now: 11:22 AM00.10.71.634.14.53.42.72.51.20.40
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

September 21

Sun intensity in Sioux Falls, South Dakota (SD) is at its highest tomorrow at 2:00 PM CDT, registering UV Index 1.3 (Low risk).

02468109 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMCentral Daylight Time (CDT, GMT-5)00.20.611.21.30.80.40.20.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

September 19, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0
Low
9:00 AM0.2
Low
10:00 AM0.7
Low
11:00 AM0.8
Low
12:00 PM0.7
Low
1:00 PM1.1
Low
2:00 PM1.6
Low
3:00 PM1.9
Low
4:00 PM1.6
Low
5:00 PM0.8
Low
6:00 PM0.3
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 20, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.1
Low
9:00 AM0.7
Low
10:00 AM1.6
Low
11:00 AM3
Moderate
12:00 PM4.1
Moderate
1:00 PM4.5
Moderate
2:00 PM3.4
Moderate
3:00 PM2.7
Moderate
4:00 PM2.5
Moderate
5:00 PM1.2
Low
6:00 PM0.4
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 21, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0
Low
9:00 AM0
Low
10:00 AM0.2
Low
11:00 AM0.6
Low
12:00 PM1
Low
1:00 PM1.2
Low
2:00 PM1.3
Low
3:00 PM0.8
Low
4:00 PM0.4
Low
5:00 PM0.2
Low
6:00 PM0.1
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 22, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0.1
Low
9:00 AM0.5
Low
10:00 AM1.7
Low
11:00 AM3.2
Moderate
12:00 PM4.6
Moderate
1:00 PM5.5
High
2:00 PM5.4
Moderate
3:00 PM4.5
Moderate
4:00 PM3
Moderate
5:00 PM1.5
Low
6:00 PM0.5
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 23, 2026

TimeUV IndexRisk
12:00 AM0
Low
1:00 AM0
Low
2:00 AM0
Low
3:00 AM0
Low
4:00 AM0
Low
5:00 AM0
Low
6:00 AM0
Low
7:00 AM0
Low
8:00 AM0
Low
9:00 AM0.6
Low
10:00 AM1.7
Low
11:00 AM2
Low
12:00 PM4.5
Moderate
1:00 PM5.6
High
2:00 PM5.4
Moderate
3:00 PM4.6
Moderate
4:00 PM3
Moderate
5:00 PM1.5
Low
6:00 PM0.5
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low
Data Source: National Oceanic and Atmospheric Administration (NOAA)

Nearby Places

Maximum UV Index Today
Data Source: National Oceanic and Atmospheric Administration (NOAA)