Wednesday, November 4

UV index forecast in Mercer Island, Washington

Today’s forecast is not available here yet. The latest, for Wednesday, November 4, peaked at 2 (low) around 12 PM.

UV index right now in Mercer Island

The forecast for the current hour is unavailable. Check back for a new forecast.

Protection on Nov 4Below UV 3 all dayUV 3 or higher, local time
Solar noon11:53 AMwhen the sun is highest
Sunrise · sunset7:00 AM · 4:47 PMlocal time
Peak2around 12 PM

Sun protection on Wednesday, November 4

Low No protection needed. You can safely stay outside using minimal sun protection (EPA).

What the UV index scale means

Hourly UV forecast

0 3 6 8 11 9AM 1 1 11AM 2 1 1PM 1 3PM
Mercer Island hourly UV index, Wednesday, November 4: peaks at 2 (Low). Colors follow the WHO exposure categories.
HourUV indexExposure
9 AM0Low
10 AM1Low
11 AM1Low
12 PM2Low
1 PM1Low
2 PM1Low
3 PM0Low
 NOAA/EPA UV Index forecast for ZIP 98040, local time. Forecast retrieved Nov 4, 2026 at 11:59 AM PST.

Recent UV forecasts in Mercer Island

Across 7 available forecast dates from Oct 29, 2026 to Nov 4, 2026, the forecast peak ranged from 1 to 2 (highest on Nov 1, 2026).

DatePeak UVExposure
Wed, Nov 42Low
Tue, Nov 31Low
Mon, Nov 21Low
Sun, Nov 12Low
Sat, Oct 311Low
Fri, Oct 301Low
Thu, Oct 291Low
 Archived NOAA/EPA forecasts, not measured UV. Only available dates are shown; missing dates are not estimated.

UV index today near Mercer Island

CityDistancePeak today
Bellevue, WA4.3 mi—
Renton, WA6.2 mi—
Seattle, WA6.8 mi—
Burien, WA8.1 mi—
Issaquah, WA8.7 mi—
SeaTac, WA8.7 mi—
Sammamish, WA9.3 mi—
Kirkland, WA9.3 mi—

More: Washington UV index · Mercer Island frost dates · Lake Washington water temperature · UV index explained