Wednesday, November 4

UV index forecast in San Francisco, California

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

UV index right now in San Francisco

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

Protection on Nov 411 AM–2 PMUV 3 or higher, local time
Solar noon11:54 AMwhen the sun is highest
Sunrise · sunset6:40 AM · 5:08 PMlocal time
Peak4around 12 PM

Sun protection on Wednesday, November 4

Moderate Protection needed. Seek shade during late morning through mid-afternoon. Use broad-spectrum SPF 15+ sunscreen on exposed skin and wear protective clothing, a wide-brimmed hat and sunglasses (EPA).

What the UV index scale means

Hourly UV forecast

0 3 6 8 11 8AM 1 2 10AM 3 4 12PM 3 2 2PM 1
San Francisco hourly UV index, Wednesday, November 4: peaks at 4 (Moderate). Colors follow the WHO exposure categories.
HourUV indexExposure
8 AM0Low
9 AM1Low
10 AM2Low
11 AM3Moderate
12 PM4Moderate
1 PM3Moderate
2 PM2Low
3 PM1Low
 NOAA/EPA UV Index forecast for ZIP 94102, local time. Forecast retrieved Nov 4, 2026 at 11:59 AM PST.

Recent UV forecasts in San Francisco

Across 7 available forecast dates from Oct 29, 2026 to Nov 4, 2026, the forecast peak ranged from 2 to 4 (highest on Oct 30, 2026).

DatePeak UVExposure
Wed, Nov 44Moderate
Tue, Nov 32Low
Mon, Nov 22Low
Sun, Nov 14Moderate
Sat, Oct 313Moderate
Fri, Oct 304Moderate
Thu, Oct 293Moderate
 Archived NOAA/EPA forecasts, not measured UV. Only available dates are shown; missing dates are not estimated.

UV index today near San Francisco

CityDistancePeak today
Daly City, CA6.2 mi—
Berkeley, CA8.7 mi—
South San Francisco, CA8.7 mi—
Alameda, CA9.3 mi—
Oakland, CA11 mi—
San Bruno, CA11 mi—

More: California UV index · San Francisco frost dates · San Francisco (Ocean Beach) water temperature · UV index explained