UV Index Today in St. Louis, Missouri (MO)

Tuesday, October 13, 2026 -6:16 PM CDT (GMT-5)

The UV Index in St. Louis, Missouri (MO) right now is 0.2. This reading was last updated at 6:00 PM CDT, about 16 minutes ago. The UV Index at7:00 PM CDT, in about 43 minutes from now, is expected to be 0.

The maximum UV Index today in St. Louis was 5.8 at 1:00 PM CDT,5 hours and 16 minutes ago. The maximum UV Index tomorrow is expected to be 4.2 at 2:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

October 13
5.8
1:00 PM CDT
High

Tomorrow

October 14
4.2
2:00 PM CDT
Moderate

UV Index Today Hourly

October 13

UV levels in St. Louis, Missouri (MO) are projected to top out at 5.8 today, hitting High risk near 1:00 PM CDT.

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMCentral Daylight Time (CDT, GMT-5)Now: 6:16 PM00.10.82.13.75.15.85.23.82.20.80.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

October 14

The sun will be strongest in St. Louis, Missouri (MO) around 2:00 PM CDT tomorrow, with a UV Index of 4.2 (Moderate risk).

02468108 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMCentral Daylight Time (CDT, GMT-5)00.10.31.21.734.23.21.80.50.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

October 13, 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 AM0.8
Low
10:00 AM2.1
Low
11:00 AM3.7
Moderate
12:00 PM5.1
Moderate
1:00 PM5.8
High
2:00 PM5.2
Moderate
3:00 PM3.8
Moderate
4:00 PM2.2
Low
5:00 PM0.8
Low
6:00 PM0.2
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

October 14, 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 AM0.1
Low
10:00 AM0.3
Low
11:00 AM1.2
Low
12:00 PM1.7
Low
1:00 PM3
Moderate
2:00 PM4.2
Moderate
3:00 PM3.2
Moderate
4:00 PM1.8
Low
5:00 PM0.5
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

October 15, 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 AM0.6
Low
10:00 AM1.3
Low
11:00 AM2.5
Moderate
12:00 PM3.1
Moderate
1:00 PM5.2
Moderate
2:00 PM5.1
Moderate
3:00 PM3.7
Moderate
4:00 PM2.1
Low
5:00 PM0.8
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

October 16, 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 AM0.7
Low
10:00 AM1.8
Low
11:00 AM3.2
Moderate
12:00 PM4.4
Moderate
1:00 PM4.9
Moderate
2:00 PM4.4
Moderate
3:00 PM3.2
Moderate
4:00 PM1.8
Low
5:00 PM0.7
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

October 17, 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 AM3.1
Moderate
12:00 PM4.3
Moderate
1:00 PM4.9
Moderate
2:00 PM4.4
Moderate
3:00 PM3.2
Moderate
4:00 PM1.8
Low
5:00 PM0.7
Low
6:00 PM0
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)