UV Index in Fortuna, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents of Fortuna, United States, where the coastal climate and frequent sun exposure can pose risks to skin health. With UV levels peaking at a significant 10 during midday hours, awareness helps individuals take necessary precautions against sunburn and long-term skin damage. By recognizing the daily fluctuations in UV intensity, residents can enjoy the beautiful, temperate weather while protecting their skin from potentially harmful rays. Stay informed and make sun safety a part of your routine in Fortuna!

Hourly UV Index in Fortuna

The UV index begins its ascent at 07:00, starting at a gentle 1, then climbs gradually through the morning. By 10:00, it reaches a moderate 5, but from 11:00 onwards, the sun's intensity becomes pronounced, peaking at an impressive 10 between 13:00 and 14:00. After this zenith, the index dips to 8 at 15:00 and continues its decline, settling back to 2 by 18:00. As the day winds down into the evening, the UV index drops to a low 1 by 19:00, signaling a return to safer sun exposure levels. Enjoy the sunshine while staying protected during the high points!

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	9	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	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Fortuna

Throughout the year, the UV Index experiences significant fluctuations, impacting the level of sun exposure risk for individuals. High-risk months include March through September, where the UV Index reaches high to extreme levels, with the highest recorded in June at 11. During these peak months, the recommended burn time decreases to as little as 10 to 15 minutes, indicating a need for heightened precautions. Visitors and residents are strongly advised to protect their skin by using sunscreen, wearing protective clothing, and seeking shade during the peak sunlight hours, especially from April to September, to minimize the risk of harmful UV exposure. Conversely, in the winter months (December to February), the UV levels are more moderate, allowing for safer outdoor activities with longer burn times of 30 to 45 minutes.

Monthly Maximum UV Index for Fortuna, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Fortuna. 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 Fortuna, 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 Fortuna UV Index with Other United States Cities

The table above highlights how UV exposure in Fortuna 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.

Fortuna'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
Fortuna	3	4	7	8	10	11	10	10	8	6	4	2
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