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UV Index in Boston

Day Summary

Today's UV index in Boston, United States United States will be up to 6.8, indicating a high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.

Last checked: 2025-05-10

Forecast

Today's tips

With Boston's UV index reaching 6.8, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.

Boston's UV Index

Boston's UV index varies throughout the year, typically peaking around 7 to 8 in summer and dropping to 1 or 2 in winter. Spring and fall have moderate UV levels near 4 to 5.

Weather Seasons

UV index

Boston experiences four distinct seasons: cold, snowy winters; warm, sometimes humid summers; and brief, colorful springs and autumns with mild temperatures. Snowfall is common in winter, while spring and fall bring more rain.

Boston's Climate

Compared to the wider New England region, Boston tends to have milder coastal weather with less extreme cold than inland areas. Neighboring cities like New York City are warmer in winter, while Boston is colder and snowier due to its northern location.

Hourly Trend

See the UV index hour by hour for Boston, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.

Disclaimer

* This page's content about the UV index in Boston (United States) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.