Saint Louis, Missouri, United States UV Index Forecast

Find the UV Index forecast for today, tomorrow and the next 15 days for Saint Louis, Missouri, United States, The Ultraviolet Index forecast, which measures the radiation from the sun that reaches the Earth's surface is updated hourly.

Current UV Index
11:00 am

High7

UV INDEX

Hourly UV Index Forecast for Today
August 4, 2025

0
7 am
1
8 am
2
9 am
5
10 am
7
11 am
7
12 pm
8
1 pm
9
2 pm
8
3 pm
7
4 pm
5
5 pm
3
6 pm
2
7 pm
  • Low
    1-2
  • Moderate
    3-4-5
  • High
    6-7
  • Very High
    8-9-10
  • Xtreme
    11+

As of 11:00 am today in Saint Louis, Missouri, United States, the UV Index is currently at a High level of 7.

Summary of Hourly UV Index Forecast for Today and Tomorrow in Saint Louis, Missouri, United States.

Today

Time Range UV Index Risk
7 am 0
Low
8 am 1
Low
9 am 2
Low
10 am 5
Moderate
11 am 7
High
12 pm 7
High
1 pm 8
Very High
2 pm 9
Very High
3 pm 8
Very High
4 pm 7
High
5 pm 5
Moderate
6 pm 3
Moderate
7 pm 2
Low

Tomorrow

Time Range UV Index Risk
7 am 1
Low
8 am 2
Low
9 am 4
Moderate
10 am 5
Moderate
11 am 6
High
12 pm 6
High
1 pm 7
High
2 pm 8
Very High
3 pm 7
High
4 pm 6
High
5 pm 5
Moderate
6 pm 4
Moderate
7 pm 3
Moderate

Daily Saint Louis UV Index Forecast for the next 15 days:

9
4 Aug
8
5 Aug
8
6 Aug
8
7 Aug
8
8 Aug
8
9 Aug
5
10 Aug
8
11 Aug
3
12 Aug
8
13 Aug
6
14 Aug
5
15 Aug
6
16 Aug
8
17 Aug
  • Low
    1-2
  • Moderate
    3-4-5
  • High
    6-7
  • Very High
    8-9-10
  • Xtreme
    11+

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