64°F

Thornton, Colorado, USA

Updated: 08-Feb-2026 3:50pm

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Maximum Daily UV Index

Report for Year 2026

Data last updated 2/8/2026 3:50 PM.

Other Years:

Day	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1	1.2	2.0	---	---	---	---	---	---	---	---	---	---
2	2.0	1.6	---	---	---	---	---	---	---	---	---	---
3	2.1	1.7	---	---	---	---	---	---	---	---	---	---
4	2.6	2.6	---	---	---	---	---	---	---	---	---	---
5	1.2	3.1	---	---	---	---	---	---	---	---	---	---
6	1.8	1.9	---	---	---	---	---	---	---	---	---	---
7	2.0	3.5	---	---	---	---	---	---	---	---	---	---
8	0.6	3.2	---	---	---	---	---	---	---	---	---	---
9	1.6	---	---	---	---	---	---	---	---	---	---	---
10	1.8	---	---	---	---	---	---	---	---	---	---	---
11	2.1	---	---	---	---	---	---	---	---	---	---	---
12	2.4	---	---	---	---	---	---	---	---	---	---	---
13	0.0	---	---	---	---	---	---	---	---	---	---	---
14	2.2	---	---	---	---	---	---	---	---	---	---	---
15	2.2	---	---	---	---	---	---	---	---	---	---	---
16	1.5	---	---	---	---	---	---	---	---	---	---	---
17	1.8	---	---	---	---	---	---	---	---	---	---	---
18	2.2	---	---	---	---	---	---	---	---	---	---	---
19	2.0	---	---	---	---	---	---	---	---	---	---	---
20	2.2	---	---	---	---	---	---	---	---	---	---	---
21	2.3	---	---	---	---	---	---	---	---	---	---	---
22	1.3	---	---	---	---	---	---	---	---	---	---	---
23	1.5	---	---	---	---	---	---	---	---	---	---	---
24	2.4	---	---	---	---	---	---	---	---	---	---	---
25	2.2	---	---	---	---	---	---	---	---	---	---	---
26	1.7	---	---	---	---	---	---	---	---	---	---	---
27	2.6	---	---	---	---	---	---	---	---	---	---	---
28	0.9	---	---	---	---	---	---	---	---	---	---	---
29	2.5		---	---	---	---	---	---	---	---	---	---
30	1.6		---	---	---	---	---	---	---	---	---	---
31	1.8		---		---		---	---		---		---

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Highest High	2.6	3.5	---	---	---	---	---	---	---	---	---	---
Average High	1.8	2.5	---	---	---	---	---	---	---	---	---	---
Lowest High	0.0	1.6	---	---	---	---	---	---	---	---	---	---

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.