UV Index in Stillwater, United States

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Stillwater, United States, where the Cfa climate brings warm summers and higher sun exposure. As you enjoy the beautiful outdoors, being aware of UV levels is essential for preventing sunburn and protecting your long-term skin health. With peak UV Index values reaching 11 during the midday hours, Stillwater residents must take precautions to minimize their risk of overexposure. By staying informed about UV conditions, you can enjoy the sunshine safely while keeping your skin healthy and glowing.

Hourly UV Index in Stillwater

The UV Index undergoes a dramatic rise throughout the day, starting from a gentle 1 at 07:00 and gradually climbing to a peak of 11 by 13:00. As the sun reaches its zenith, UV exposure intensifies, with values soaring to 9 at noon and tapering off through the afternoon. By 15:00, the index begins to decline, slipping back to 6 by 16:00, and down to a safe 1 by 19:00. This data highlights the importance of sun protection during peak hours, especially between 10:00 and 15:00, when the UV Index is at its most potent.

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	7	high	25 min
12:00	9	very high	15 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	9	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 Stillwater

Throughout the year, UV exposure varies significantly, with high-risk months primarily occurring from April to September. The UV Index peaks during June and July at 11, indicating an extreme risk of harm from unprotected sun exposure, where burn time is as short as 10 minutes. Early spring begins with moderate levels in January (UV Index 4) and escalates to very high levels in April (UV Index 10). As the summer progresses, residents and visitors should be especially cautious during peak hours, practicing sun safety measures such as wearing sunscreen, protective clothing, and seeking shade to reduce risk. As autumn approaches, UV levels decrease, dropping back to moderate levels by December, making it safer for prolonged outdoor activities.

Monthly Maximum UV Index for Stillwater, United States

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

The table above highlights how UV exposure in Stillwater 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.

Stillwater'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
Stillwater	4	6	7	10	10	11	11	10	9	7	5	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