Saint Jacob, Illinois, United States UV Index Forecast

Find the UV Index forecast for today, tomorrow and the next 15 days for Saint Jacob, Illinois, 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
6:30 pm

Moderate3

UV INDEX

Hourly UV Index Forecast for Today
August 17, 2025

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

As of 6:30 pm today in Saint Jacob, Illinois, United States, the UV Index is currently at a Moderate level of 3.

Summary of Hourly UV Index Forecast for Today and Tomorrow in Saint Jacob, Illinois, 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 6
High
12 pm 7
High
1 pm 7
High
2 pm 7
High
3 pm 6
High
4 pm 6
High
5 pm 4
Moderate
6 pm 3
Moderate

Tomorrow

Time Range UV Index Risk
7 am 0
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 7
High
5 pm 5
Moderate
6 pm 3
Moderate

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

7
17 Aug
8
18 Aug
8
19 Aug
6
20 Aug
7
21 Aug
8
22 Aug
8
23 Aug
8
24 Aug
8
25 Aug
8
26 Aug
7
27 Aug
8
28 Aug
8
29 Aug
8
30 Aug
  • Low
    1-2
  • Moderate
    3-4-5
  • High
    6-7
  • Very High
    8-9-10
  • Xtreme
    11+

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