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

Saturday, August 15, 2026 -2:26 AM CDT (GMT-5)

The UV Index in St. Louis, Missouri (MO) right now is 0. This reading was last updated at 2:00 AM CDT, about 26 minutes ago. The UV Index at3:00 AM CDT, in about 33 minutes from now, is expected to be 0.

The maximum UV Index today in St. Louis is expected to be 8.1 at 1:00 PM CDT,10 hours and 33 minutes from now. The maximum UV Index tomorrow is expected to be 7.9 at 2:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

August 15
8.1
1:00 PM CDT
Very High

Tomorrow

August 16
7.9
2:00 PM CDT
Very High

UV Index Today Hourly

August 15

UV levels in St. Louis, Missouri (MO) are projected to top out at 8.1 today, hitting Very High risk near 1:00 PM CDT.

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)Now: 2:26 AM00.20.82.13.95.57.18.18.16.54.32.30.80.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

August 16

The sun will be strongest in St. Louis, Missouri (MO) around 2:00 PM CDT tomorrow, with a UV Index of 7.9 (Very High risk).

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)00.20.61.43.61.11.37.87.96.14.12.10.80.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

August 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 AM0.2
Low
8:00 AM0.6
Low
9:00 AM1.6
Low
10:00 AM2.6
Moderate
11:00 AM3.4
Moderate
12:00 PM6
High
1:00 PM7
High
2:00 PM6.8
High
3:00 PM5.6
High
4:00 PM3.8
Moderate
5:00 PM2.1
Low
6:00 PM0.8
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 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 AM0.2
Low
8:00 AM0.8
Low
9:00 AM2.1
Low
10:00 AM3.9
Moderate
11:00 AM5.5
High
12:00 PM7.1
High
1:00 PM8.1
Very High
2:00 PM8.1
Very High
3:00 PM6.5
High
4:00 PM4.3
Moderate
5:00 PM2.3
Low
6:00 PM0.8
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 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 AM0.2
Low
8:00 AM0.6
Low
9:00 AM1.4
Low
10:00 AM3.6
Moderate
11:00 AM1.1
Low
12:00 PM1.3
Low
1:00 PM7.8
Very High
2:00 PM7.9
Very High
3:00 PM6.1
High
4:00 PM4.1
Moderate
5:00 PM2.1
Low
6:00 PM0.8
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 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 AM0.2
Low
8:00 AM0.8
Low
9:00 AM2.2
Low
10:00 AM4.3
Moderate
11:00 AM6.5
High
12:00 PM8.3
Very High
1:00 PM9
Very High
2:00 PM7.3
High
3:00 PM6.2
High
4:00 PM4
Moderate
5:00 PM2
Low
6:00 PM0.4
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 18, 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 AM0.2
Low
8:00 AM0.8
Low
9:00 AM2
Low
10:00 AM3.9
Moderate
11:00 AM6.4
High
12:00 PM8.1
Very High
1:00 PM8.7
Very High
2:00 PM8.1
Very High
3:00 PM6.4
High
4:00 PM4.3
Moderate
5:00 PM2.3
Low
6:00 PM0.8
Low
7:00 PM0.2
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)