37°F

Thornton, Colorado, USA

Updated: 21-Feb-2025 10:05am

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Maximum Daily UV Index

Report for Year 2025

Data last updated 2/21/2025 10:05 AM.

Other Years:

Day	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1	2.1	2.2	---	---	---	---	---	---	---	---	---	---
2	2.1	3.0	---	---	---	---	---	---	---	---	---	---
3	2.1	3.2	---	---	---	---	---	---	---	---	---	---
4	0.5	3.0	---	---	---	---	---	---	---	---	---	---
5	1.9	3.4	---	---	---	---	---	---	---	---	---	---
6	2.1	3.1	---	---	---	---	---	---	---	---	---	---
7	2.5	3.2	---	---	---	---	---	---	---	---	---	---
8	2.2	3.4	---	---	---	---	---	---	---	---	---	---
9	1.7	2.9	---	---	---	---	---	---	---	---	---	---
10	2.3	1.9	---	---	---	---	---	---	---	---	---	---
11	2.0	1.3	---	---	---	---	---	---	---	---	---	---
12	2.0	2.9	---	---	---	---	---	---	---	---	---	---
13	1.9	3.6	---	---	---	---	---	---	---	---	---	---
14	2.0	3.2	---	---	---	---	---	---	---	---	---	---
15	2.2	0.9	---	---	---	---	---	---	---	---	---	---
16	2.5	3.6	---	---	---	---	---	---	---	---	---	---
17	2.5	1.5	---	---	---	---	---	---	---	---	---	---
18	1.2	1.7	---	---	---	---	---	---	---	---	---	---
19	2.5	2.1	---	---	---	---	---	---	---	---	---	---
20	1.4	3.7	---	---	---	---	---	---	---	---	---	---
21	1.7	2.5	---	---	---	---	---	---	---	---	---	---
22	2.0	---	---	---	---	---	---	---	---	---	---	---
23	2.5	---	---	---	---	---	---	---	---	---	---	---
24	3.0	---	---	---	---	---	---	---	---	---	---	---
25	0.6	---	---	---	---	---	---	---	---	---	---	---
26	2.5	---	---	---	---	---	---	---	---	---	---	---
27	2.8	---	---	---	---	---	---	---	---	---	---	---
28	2.6	---	---	---	---	---	---	---	---	---	---	---
29	2.5		---	---	---	---	---	---	---	---	---	---
30	3.1		---	---	---	---	---	---	---	---	---	---
31	3.1		---		---		---	---		---		---

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Highest High	3.1	3.7	---	---	---	---	---	---	---	---	---	---
Average High	2.1	2.7	---	---	---	---	---	---	---	---	---	---
Lowest High	0.5	0.9	---	---	---	---	---	---	---	---	---	---

UV Level	UV Index	Description

Low	0-2	No danger to the average person.
Moderate	3-5	Little risk of harm from unprotected sun exposure.
High	6-7	High risk of harm from unprotected sun exposure.
Very High	8-10	Very high risk of harm from unprotected sun exposure.
Extreme	11+	Extreme risk of harm from unprotected sun exposure.

Script Developed by Murry Conarroe of Wildwood Weather.