Does Charles River Grove need sun protection in winter?

Not every day. Midwinter middays in Charles River Grove often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.

Does the water make UV worse in Charles River Grove?

It can. The river reflect ultraviolet, so skin that is not covered (including under the chin and on the tops of feet) picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.

UV index in Charles River Grove today

Charles River Grove sits on the river in Massachusetts at 42.1°S. Open water and bare banks mean extra UV on top of a summer midday that typically reaches 8–10 (very high). This is cool-temperate America: summer UV still climbs into the very high band, and spring arrives before the weather feels hot.

Live reading · data by Open-Meteo · reference monitoring by ARPANSA

Today and tomorrow in Charles River Grove

Peak UV, temperature and conditions for Charles River Grove. Tomorrow’s peak is the number to plan around if you’re heading out in the middle of the day.

Weather conditions right now

Cloud and rain cut heat more than they cut UV. A partly cloudy day in Charles River Grove can still sit at protection levels. Why you burn on cloudy days.

When Charles River Grove needs sun protection

Sun protection is needed in Charles River Grove typically from May through September, and any clear spring or fall day UV reaches 3. Time on the river reflects UV back up, so banks and boats need the same cover as a beach day.

The threshold, per SunSmart and ARPANSA: whenever UV reaches 3 or above, Slip on covering clothing, Slop on SPF 50+ sunscreen, Slap on a hat, Seek shade and Slide on sunglasses. Read the full sun safety guide.

The UV scale at a glance

0–2Low
3–5Moderate
6–7High
8–10Very high
11+Extreme

Frequently asked questions

When does Charles River Grove need sun protection?: Whenever the UV index is 3 or above. In Charles River Grove that is typically from May through September, and any clear spring or fall day UV reaches 3. The EPA Sun Safety action steps apply at the same threshold used worldwide.
Does Charles River Grove need sun protection in winter?: Not every day. Midwinter middays in Charles River Grove often sit below UV 3, but clear late-winter and early-spring days cross the threshold before summer fully arrives. Check the live index.
Does the water make UV worse in Charles River Grove?: It can. The river reflect ultraviolet, so skin that is not covered (including under the chin and on the tops of feet) picks up extra dose on top of the direct sun. The live UV index on this page is the sky reading; reflection is on top of that.