Fort Collins, Colorado, United States UV Index Forecast

Find the UV Index forecast for today, tomorrow and the next 15 days for Fort Collins, Colorado, 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
2:29 pm

Very High9

UV INDEX

Hourly UV Index Forecast for Today
July 17, 2025

0
6 am
0
7 am
0
8 am
1
9 am
1
10 am
2
11 am
2
12 pm
6
1 pm
9
2 pm
9
3 pm
8
4 pm
6
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 2:29 pm today in Fort Collins, Colorado, United States, the UV Index is currently at a Very High level of 9.

Summary of Hourly UV Index Forecast for Today and Tomorrow in Fort Collins, Colorado, United States.

Today

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

Daily Fort Collins UV Index Forecast for the next 15 days:

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

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