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

Tuesday, April 7, 2026 - 3:51 AM CDT (GMT-5)

The UV Index in St. Louis, Missouri (MO) right now is 0. This reading was last updated at 3:00 AM CDT, about 51 minutes ago. The UV Index at 4:00 AM CDT, in about 8 minutes from now, is expected to be 0.

The maximum UV Index today in St. Louis is expected to be 4.6 at 1:00 PM CDT, 9 hours and 8 minutes from now. The maximum UV Index tomorrow is expected to be 5.5 at 1:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

April 7
4.6
1:00 PM CDT
Moderate

Tomorrow

April 8
5.5
1:00 PM CDT
High

UV Index Today Hourly

April 7

UV levels in St. Louis, Missouri (MO) are projected to top out at 4.6 today, hitting Moderate 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: 3:51 AM00.10.40.82.43.24.64.14.12.510.40
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

April 8

The sun will be strongest in St. Louis, Missouri (MO) around 1:00 PM CDT tomorrow, with a UV Index of 5.5 (High risk).

02468107 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PMCentral Daylight Time (CDT, GMT-5) 00.41.22.33.84.95.55.44.32.81.40.50
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

April 6, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0
Low
8:00 AM 0.5
Low
9:00 AM 1.5
Low
10:00 AM 3
Moderate
11:00 AM 4.7
Moderate
12:00 PM 6.1
High
1:00 PM 6.7
High
2:00 PM 6.1
High
3:00 PM 4.8
Moderate
4:00 PM 3.1
Moderate
5:00 PM 1.5
Low
6:00 PM 0.5
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 7, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0
Low
8:00 AM 0.1
Low
9:00 AM 0.4
Low
10:00 AM 0.8
Low
11:00 AM 2.4
Low
12:00 PM 3.2
Moderate
1:00 PM 4.6
Moderate
2:00 PM 4.1
Moderate
3:00 PM 4.1
Moderate
4:00 PM 2.5
Moderate
5:00 PM 1
Low
6:00 PM 0.4
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 8, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0
Low
8:00 AM 0.4
Low
9:00 AM 1.2
Low
10:00 AM 2.3
Low
11:00 AM 3.8
Moderate
12:00 PM 4.9
Moderate
1:00 PM 5.5
High
2:00 PM 5.4
Moderate
3:00 PM 4.3
Moderate
4:00 PM 2.8
Moderate
5:00 PM 1.4
Low
6:00 PM 0.5
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 9, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0
Low
8:00 AM 0.5
Low
9:00 AM 1.5
Low
10:00 AM 3.1
Moderate
11:00 AM 4.7
Moderate
12:00 PM 6.1
High
1:00 PM 6.5
High
2:00 PM 6.2
High
3:00 PM 4.7
Moderate
4:00 PM 2.8
Moderate
5:00 PM 0.7
Low
6:00 PM 0.2
Low
7:00 PM 0
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low

April 10, 2026
Time UV Index Risk
12:00 AM 0
Low
1:00 AM 0
Low
2:00 AM 0
Low
3:00 AM 0
Low
4:00 AM 0
Low
5:00 AM 0
Low
6:00 AM 0
Low
7:00 AM 0
Low
8:00 AM 0.4
Low
9:00 AM 1.2
Low
10:00 AM 1
Low
11:00 AM 2.1
Low
12:00 PM 0.9
Low
1:00 PM 2.7
Moderate
2:00 PM 0.6
Low
3:00 PM 0.5
Low
4:00 PM 0.2
Low
5:00 PM 0.1
Low
6:00 PM 0.4
Low
7:00 PM 0.1
Low
8:00 PM 0
Low
9:00 PM 0
Low
10:00 PM 0
Low
11:00 PM 0
Low
Data Source: National Oceanic and Atmospheric Administration (NOAA)

Nearby Places

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