UV Index in Killeen, United States

Last updated: July 2, 2025

Understanding the UV Index is crucial for the health and well-being of Killeen residents, as it serves as a vital tool in safeguarding against harmful UV radiation. By monitoring UV levels, you can effectively prevent sunburn and protect your skin from long-term damage, especially during the hot summer months. With Killeen’s Cfa climate, which brings ample sunshine and potential for high UV exposure, awareness of the daily UV Index is essential for outdoor enthusiasts and casual sunbathers alike. Keep an eye on those UV levels to enjoy the outdoors safely!

Hourly UV Index in Killeen

As the sun rises, the UV Index starts at a mild 1 at 7:00 AM and remains low until 9:00 AM, where it climbs to 3. By 10:00 AM, the index accelerates to a moderate 5, but it’s at 11:00 AM that the heat intensifies, reaching 8. The peak occurs at 12:00 PM with a staggering value of 10, followed by the highest point of the day at 1:00 PM and 2:00 PM, where it maxes out at 12. After this peak, the index gradually declines: it drops to 10 by 3:00 PM and continues to decrease to 7 at 4:00 PM. By the late afternoon, the intensity wanes, falling to 5 at 5:00 PM and back down to 2 by 6:00 PM, before settling at 1 again as day turns to dusk by 7:00 PM. Remember to shield yourself during the midday hours when the UV radiation is at its most intense!

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	3	moderate	30 min
10:00	5	moderate	30 min
11:00	8	very high	15 min
12:00	10	very high	15 min
13:00	12	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	7	high	25 min
17:00	5	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Killeen

The UV Index displays significant seasonal changes, peaking during the summer months of May through September, where it reaches extreme levels of 11 to 12. The highest risk for UV exposure occurs from May to August, with burn times as short as 10 minutes during these months. In contrast, January and December show moderate UV levels with longer burn times of 30 minutes. Visitors and residents should take precautions, especially from late spring through summer, by seeking shade, wearing protective clothing, and using broad-spectrum sunscreen when outdoors, as the risk of sunburn and skin damage is exceptionally high during these periods.

Monthly Maximum UV Index for Killeen, United States

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

The table above highlights how UV exposure in Killeen 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.

Killeen'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
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Killeen	5	7	9	10	11	12	12	11	11	8	6	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5