UV Index in Colusa, United States

Last updated: May 3, 2025

In Colusa, United States, staying informed about the UV Index is crucial for safeguarding your skin health and preventing sunburn. Understanding UV levels helps residents make informed choices about sun protection, especially during peak hours when the risk is highest. With a Mediterranean climate, Colusa experiences significant UV exposure, particularly from late morning to early afternoon, when indices can reach highs of 10. By staying aware of the UV Index, you can enjoy the beautiful California sun while protecting yourself from harmful effects.

Hourly UV Index in Colusa

The UV Index data unveils a dynamic progression of sun intensity throughout the day. Starting low at 1 at 07:00, the index gradually escalates, reaching maximum levels of 10 between 12:00 and 14:00. This peak signals a critical time for sun protection. As the afternoon wanes, the index tapers off to 8 at 15:00, and then descends further to 3 by 17:00, and 2 by 18:00. Ultimately, the day concludes softly with a return to 1 at 19:00. It's essential to stay vigilant during those peak hours to safeguard your skin while enjoying the sun!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	2	low	45 min
09:00	4	moderate	30 min
10:00	6	high	25 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	10	very high	15 min
14:00	10	very high	15 min
15:00	8	very high	15 min
16:00	6	high	25 min
17:00	3	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Colusa

Throughout the year, UV exposure varies significantly, with the highest intensity typically occurring during spring and summer months. March marks a transition with a UV Index rising to 7 (high exposure), while April and May surge to 8 and 10, respectively, indicating very high exposure. The peak is reached in June at 11, classified as extreme, requiring the shortest burn time of just 10 minutes. July and August continue with 10 (very high), before tapering off in September to 9. October sees a decrease to 6 (high), followed by a return to moderate levels in November and December. Visitors and residents are advised to exercise extra caution during the high-risk months of April through September, especially during midday hours. It's crucial to apply sunscreen, wear protective clothing, and seek shade to minimize the risk of skin damage during these periods.

Monthly Maximum UV Index for Colusa, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Colusa. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Colusa, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Colusa UV Index with Other United States Cities

The table above highlights how UV exposure in Colusa compares to other major locations across United States. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Colusa's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chicago UVI	3	4	6	8	9	10	10	9	8	6	4	2
Brooklyn UVI	3	5	6	8	10	10	9	9	8	6	4	2
New York City UVI	3	5	6	8	10	10	9	9	8	6	4	2
Colusa	3	4	7	8	10	11	10	10	9	6	4	3
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5