UV Index in Saint Francis, United States

Last updated: July 2, 2025

Understanding the UV Index in Saint Francis, United States, is essential for safeguarding your skin and overall health. With levels often peaking around midday, it's crucial to be aware of these UV radiation levels to prevent sunburn and long-term skin damage. In this Dfb climate, where seasonal variations can lead to intense sun exposure, knowing how to protect yourself ensures you enjoy the beautiful outdoors without compromising your health. Stay informed and make sun safety a priority!

Hourly UV Index in Saint Francis

As the day unfolds, the UV Index intensifies significantly, peaking at 8 between 1:00 PM and 2:00 PM—a clear signal for sun safety. Starting from a modest 1 at 7:00 AM, the index steadily escalates, hitting 5 by 11:00 AM and reaching 7 just before noon. This upward trend continues until 2:00 PM, after which the UV levels gradually decline, dropping back to 4 by 5:00 PM and dwindling to 1 again by 7:00 PM. With this data in mind, it's vital to take protective measures during the midday hours when the sun is strongest. Stay sun-safe!

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	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	5	moderate	30 min
12:00	7	high	25 min
13:00	8	very high	15 min
14:00	8	very high	15 min
15:00	7	high	25 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 Saint Francis

Throughout the year, the UV Index experiences significant seasonal changes, with the highest risk months occurring from April to August when the index reaches levels categorized as very high (8-9). In these months, the recommended burn time drops to as little as 15 minutes, indicating a pressing need for protection against harmful UV radiation. March begins the transition with a moderate index of 5, and by September, the risk diminishes to high (7). It is advisable for visitors and residents to take necessary precautions, such as wearing sunscreen and protective clothing, especially during the peak months of April to August, to minimize the risk of sunburn and long-term skin damage. Conversely, January and December present lower UV levels with an index of 2, allowing for safer outdoor activities with longer burn times of 45 minutes.

Monthly Maximum UV Index for Saint Francis, United States

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

The table above highlights how UV exposure in Saint Francis 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.

Saint Francis'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
Saint Francis	2	3	5	8	8	9	8	8	7	5	3	2
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
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