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

Saturday, August 29, 2026 -1:07 PM CDT (GMT-5)

The UV Index in St. Louis, Missouri (MO) right now is 6. This reading was last updated at 1:00 PM CDT, about 7 minutes ago. The UV Index at2:00 PM CDT, in about 52 minutes from now, is expected to be 6.4.

The maximum UV Index today in St. Louis was 6.9 at 12:00 PM CDT,1 hour and 7 minutes ago. The maximum UV Index tomorrow is expected to be 8 at 1:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

August 29
6.9
12:00 PM CDT
High

Tomorrow

August 30
8
1:00 PM CDT
Very High

UV Index Today Hourly

August 29

UV levels in St. Louis, Missouri (MO) are projected to top out at 6.9 today, hitting High risk near 12:00 PM CDT.

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)Now: 1:07 PM00.10.61.7356.966.44.92.91.90.70.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

August 30

The sun will be strongest in St. Louis, Missouri (MO) around 1:00 PM CDT tomorrow, with a UV Index of 8 (Very High risk).

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)00.61.73.75.77.687.45.93.91.90.70.10
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

August 28, 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 AM0.1
Low
8:00 AM0.6
Low
9:00 AM1.9
Low
10:00 AM3.7
Moderate
11:00 AM5.7
High
12:00 PM7.3
High
1:00 PM7.9
Very High
2:00 PM7.3
High
3:00 PM5.8
High
4:00 PM3.8
Moderate
5:00 PM1.9
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 29, 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 AM0.1
Low
8:00 AM0.6
Low
9:00 AM1.7
Low
10:00 AM3
Moderate
11:00 AM5
Moderate
12:00 PM6.9
High
1:00 PM6
High
2:00 PM6.4
High
3:00 PM4.9
Moderate
4:00 PM2.9
Moderate
5:00 PM1.9
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 30, 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 AM0.6
Low
9:00 AM1.7
Low
10:00 AM3.7
Moderate
11:00 AM5.7
High
12:00 PM7.6
Very High
1:00 PM8
Very High
2:00 PM7.4
High
3:00 PM5.9
High
4:00 PM3.9
Moderate
5:00 PM1.9
Low
6:00 PM0.7
Low
7:00 PM0.1
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

August 31, 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 AM0.6
Low
9:00 AM1.9
Low
10:00 AM3.9
Moderate
11:00 AM6.1
High
12:00 PM7.9
Very High
1:00 PM8.6
Very High
2:00 PM8
Very High
3:00 PM6.2
High
4:00 PM4
Moderate
5:00 PM2
Low
6:00 PM0.7
Low
7:00 PM0
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

September 1, 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 AM0.6
Low
9:00 AM1.9
Low
10:00 AM3.8
Moderate
11:00 AM6.2
High
12:00 PM8
Very High
1:00 PM8.7
Very High
2:00 PM8
Very High
3:00 PM6.3
High
4:00 PM4.1
Moderate
5:00 PM2
Low
6:00 PM0.7
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)