Grass Valley, California, United States

Get the UV Index hourly forecast for today, tomorrow and the next 15 days for Grass Valley, 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
12:54 am

Low0

UV INDEX

Hourly UV Index Forecast for Today
June 2, 2025

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

As of 12:54 am today in Grass Valley, 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 Grass Valley, California, United States.

Today

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

Tomorrow

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

Daily Grass Valley UV Index Forecast for the next 15 days:

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

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