UV Index in Guilford, United States

Last updated: July 2, 2025

In Guilford, understanding the UV Index is essential for protecting your skin from harmful ultraviolet rays. As a community with a Dfb climate, our summers can bring elevated UV levels, particularly between 10 AM and 2 PM, when the index peaks at 8—a critical threshold for increased sunburn risk. Staying aware of these UV levels is vital not only for preventing painful sunburns but also for promoting long-term skin health. By knowing the daily UV Index in Guilford, residents and visitors alike can enjoy the sun safely while minimizing the risk of skin damage.

Hourly UV Index in Guilford

As the sun rises, the UV Index gradually climbs, starting at a mild 1 at 07:00. By 09:00, it reaches 4, signaling the beginning of a more significant UV exposure. The real intensity begins at 10:00, peaking at 8 between 12:00 and 14:00, ensuring that midday sun-seekers are well advised to apply sunscreen and seek shade. The afternoon sees a slight decline, with the index dropping back to 6 at 15:00 and continuing its descent to 3 by 17:00. As evening approaches, the UV Index returns to a safe 1 by 18:00, bringing an end to the day's sun exposure. Remember, during those peak hours, protection is key!

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	7	high	25 min
12:00	8	very high	15 min
13:00	8	very high	15 min
14:00	8	very high	15 min
15:00	6	high	25 min
16:00	4	moderate	30 min
17:00	3	moderate	30 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Guilford

Throughout the year, UV Index levels exhibit significant seasonal variation, influencing sun exposure and the risk of skin damage. From January to March, UV exposure is generally low to moderate, with the highest burn time of 45 minutes in January decreasing to 30 minutes by February and March. April to August marks a critical period with very high UV levels, peaking in June at an index of 10, where the burn time shrinks to just 15 minutes. Following this peak, UV intensity slightly decreases in September (UV Index 7), allowing for a longer burn time of 25 minutes, before tapering off again in the last quarter of the year to moderate levels. Thus, residents and visitors are advised to exercise caution and use sun protection—from April through August, especially during midday hours, to minimize the risk of skin damage.

Monthly Maximum UV Index for Guilford, United States

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

The table above highlights how UV exposure in Guilford 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.

Guilford'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
Guilford	2	4	5	8	9	10	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