Does Russian River-Sonoma Coast need sun protection in winter?

Not every day. Midwinter middays in Russian River-Sonoma Coast 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 Russian River-Sonoma Coast?

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 Russian River-Sonoma Coast today

Russian River-Sonoma Coast is a California river suburb at 38.4°S. Typical summer peaks of 8–10 (very high) do not ease just because you are under a river red gum's thin shade. 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 Russian River-Sonoma Coast

Peak UV, temperature and conditions for Russian River-Sonoma Coast. 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 Russian River-Sonoma Coast can still sit at protection levels. Why you burn on cloudy days.

When Russian River-Sonoma Coast needs sun protection

Sun protection is needed in Russian River-Sonoma Coast 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 Russian River-Sonoma Coast need sun protection?: Whenever the UV index is 3 or above. In Russian River-Sonoma Coast 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 Russian River-Sonoma Coast need sun protection in winter?: Not every day. Midwinter middays in Russian River-Sonoma Coast 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 Russian River-Sonoma Coast?: 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.