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

Wednesday, July 15, 2026 -12:03 PM CDT (GMT-5)

The UV Index in St. Louis, Missouri (MO) right now is 9.4. This reading was last updated at 12:00 PM CDT, about 3 minutes ago. The UV Index at1:00 PM CDT, in about 56 minutes from now, is expected to be 10.

The maximum UV Index today in St. Louis is expected to be 10 at 1:00 PM CDT,56 minutes from now. The maximum UV Index tomorrow is expected to be 9.3 at 12:00 PM CDT.

Data Source: National Oceanic and Atmospheric Administration (NOAA)

Today

July 15
10
1:00 PM CDT
Very High

Tomorrow

July 16
9.3
12:00 PM CDT
Very High

UV Index Today Hourly

July 15

UV levels in St. Louis, Missouri (MO) are projected to top out at 10 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: 12:03 PM00.41.32.95.27.69.4109.47.55.22.91.30.40
Data Source: National Oceanic and Atmospheric Administration (NOAA)

UV Index Tomorrow Hourly

July 16

The sun will be strongest in St. Louis, Missouri (MO) around 12:00 PM CDT tomorrow, with a UV Index of 9.3 (Very High risk).

02468106 AM7 AM8 AM9 AM10 AM11 AM12 PM1 PM2 PM3 PM4 PM5 PM6 PM7 PM8 PMCentral Daylight Time (CDT, GMT-5)00.41.335.27.69.397.44.141.60.60.20
Data Source: National Oceanic and Atmospheric Administration (NOAA)

5 Day UV Index Forecast

July 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 AM0.4
Low
8:00 AM1.3
Low
9:00 AM2.9
Moderate
10:00 AM5.1
Moderate
11:00 AM7.4
High
12:00 PM9.1
Very High
1:00 PM9.8
Very High
2:00 PM9.2
Very High
3:00 PM7.6
Very High
4:00 PM5.3
Moderate
5:00 PM3
Moderate
6:00 PM1.3
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 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 AM0.4
Low
8:00 AM1.3
Low
9:00 AM2.9
Moderate
10:00 AM5.2
Moderate
11:00 AM7.6
Very High
12:00 PM9.4
Very High
1:00 PM10
Very High
2:00 PM9.4
Very High
3:00 PM7.5
Very High
4:00 PM5.2
Moderate
5:00 PM2.9
Moderate
6:00 PM1.3
Low
7:00 PM0.4
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 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 AM0.4
Low
8:00 AM1.3
Low
9:00 AM3
Moderate
10:00 AM5.2
Moderate
11:00 AM7.6
Very High
12:00 PM9.3
Very High
1:00 PM9
Very High
2:00 PM7.4
High
3:00 PM4.1
Moderate
4:00 PM4
Moderate
5:00 PM1.6
Low
6:00 PM0.6
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 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 AM0.4
Low
8:00 AM0.9
Low
9:00 AM1.7
Low
10:00 AM4.8
Moderate
11:00 AM7.7
Very High
12:00 PM9.2
Very High
1:00 PM7.4
High
2:00 PM5.7
High
3:00 PM4.6
Moderate
4:00 PM2
Low
5:00 PM1.3
Low
6:00 PM0.7
Low
7:00 PM0.2
Low
8:00 PM0
Low
9:00 PM0
Low
10:00 PM0
Low
11:00 PM0
Low

July 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 AM0.4
Low
8:00 AM1.3
Low
9:00 AM3
Moderate
10:00 AM5.1
Moderate
11:00 AM7.6
Very High
12:00 PM9.5
Very High
1:00 PM10.2
Very High
2:00 PM9.6
Very High
3:00 PM7.8
Very High
4:00 PM5.4
Moderate
5:00 PM3
Moderate
6:00 PM1.3
Low
7:00 PM0.4
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)