UV Index in Watertown, United States

Last updated: July 2, 2025

In Watertown, United States, understanding the UV Index is crucial for protecting your skin from harmful sun exposure. High UV levels can lead to painful sunburns and long-term skin health issues, making awareness essential, especially during the peak hours of 11 AM to 3 PM when the index reaches its maximum at 11. With Watertown's Cfa climate, characterized by warm summers, residents must stay vigilant about UV exposure risks, as even brief moments in the sun can have lasting effects. Stay informed and safeguard your skin by monitoring the UV Index daily!

Hourly UV Index in Watertown

As the sun rises, the UV Index starts low at 1 at 07:00 and 08:00, perfect for a leisurely morning. By 09:00, it climbs to 3, signaling that it's time to enjoy some shade. The intensity peaks sharply at 12:00 with a maximum index of 10, indicating a high risk of harm from unprotected sun exposure. Continuing at 13:00 and 14:00, the index holds steady at 11, urging caution with the midday sun blazing down. As the afternoon progresses, the UV levels begin to wane, dropping to 7 by 16:00, and further decreasing to 2 by 18:00. Finally, the day winds down with a gentle 1 at 19:00, marking a safe return to outdoor activities as the sun sets. Be sure to protect your skin during those peak hours!

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.
TimeUVICategoryTime to Burn
07:001low45 min
08:001low45 min
09:003moderate30 min
10:005moderate30 min
11:008very high15 min
12:0010very high15 min
13:0011extreme10 min
14:0011extreme10 min
15:0010very high15 min
16:007high25 min
17:005moderate30 min
18:002low45 min
19:001low45 min

Monthly UV Index Trends in Watertown

Throughout the year, the UV Index exhibits significant seasonal fluctuations, with the highest levels typically occurring from May to August, characterized as having an extreme exposure category with a UV Index of 11 and a burn time of just 10 minutes. Notably, March and April also present very high risk levels, with indices peaking at 9 and 10 respectively. As a result, visitors and residents are strongly advised to take precautions during these high-risk months, including applying broad-spectrum sunscreen, wearing protective clothing, and seeking shade during peak sunlight hours. In contrast, the low-risk periods in January and December, where UV levels are classified as moderate with a burn time of 30 minutes, require less vigilance but still warrant caution. Overall, staying informed and proactive about UV exposure can help ensure safety and well-being throughout the year.

Monthly Maximum UV Index for Watertown, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Watertown. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec579101111111110865
Data source: Statistical UV Index data for Watertown, 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 Watertown UV Index with Other United States Cities

The table above highlights how UV exposure in Watertown 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.
Watertown's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Chicago UVI34689101098642
Brooklyn UVI35681010998642
New York City UVI35681010998642
Los Angeles UVI46891011111010754
Watertown579101111111110865
Houston UVI589111112121110975