Saint Helena, California, United States

Get the UV Index hourly forecast for today, tomorrow and the next 15 days for Saint Helena, California, 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
6:00 am

Low0

UV INDEX

Hourly UV Index Forecast for Today
May 29, 2025

0
6:00 am
1
7:00 am
3
8:00 am
5
9:00 am
7
10:00 am
8
11:00 am
9
12:00 pm
10
1:00 pm
10
2:00 pm
9
3:00 pm
8
4:00 pm
7
5:00 pm
4
6:00 pm
2
7:00 pm
  • Low
    1-2
  • Moderate
    3-4-5
  • High
    6-7
  • Very High
    8-9-10
  • Xtreme
    11+

As of 6:00 am today in Saint Helena, California, United States, the UV Index is currently at a Low level of 0.

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

Today

Time Range UV Index Risk
6:00 am 0
Low
7:00 am 1
Low
8:00 am 3
Moderate
9:00 am 5
Moderate
10:00 am 7
High
11:00 am 8
High
12:00 pm 9
Very High
1:00 pm 10
Very High
2:00 pm 10
Very High
3:00 pm 9
Very High
4:00 pm 8
Very High
5:00 pm 7
High
6:00 pm 4
Moderate
7:00 pm 2
Moderate

Tomorrow

Time Range UV Index Risk
6:00 am 0
Low
7:00 am 1
Low
8:00 am 3
Moderate
9:00 am 5
Moderate
10:00 am 6
High
11:00 am 7
High
12:00 pm 10
Very High
1:00 pm 10
Very High
2:00 pm 10
Very High
3:00 pm 9
Very High
4:00 pm 8
Very High
5:00 pm 7
High
6:00 pm 5
Moderate
7:00 pm 3
Moderate

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

10
29 May
10
30 May
10
31 May
10
1 Jun
10
2 Jun
10
3 Jun
10
4 Jun
10
5 Jun
10
6 Jun
10
7 Jun
9
8 Jun
9
9 Jun
10
10 Jun
10
11 Jun
  • Low
    1-2
  • Moderate
    3-4-5
  • High
    6-7
  • Very High
    8-9-10
  • Xtreme
    11+

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