Wednesday, November 4

UV index forecast in Napa, California

Today’s forecast is not available here yet. The latest, for Wednesday, November 4, peaked at 3 (moderate) around 11 AM.

UV index right now in Napa

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 · 5:07 PMlocal time
Peak3around 11 AM

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 3 12PM 3 2 2PM 1
Napa hourly UV index, Wednesday, November 4: peaks at 3 (Moderate). Colors follow the WHO exposure categories.
HourUV indexExposure
8 AM0Low
9 AM1Low
10 AM2Low
11 AM3Moderate
12 PM3Moderate
1 PM3Moderate
2 PM2Low
3 PM1Low
 NOAA/EPA UV Index forecast for ZIP 94559, local time. Forecast retrieved Nov 4, 2026 at 11:59 AM PST.

Recent UV forecasts in Napa

Across 7 available forecast dates from Oct 29, 2026 to Nov 4, 2026, the forecast peak ranged from 1 to 3 (highest on Oct 30, 2026).

DatePeak UVExposure
Wed, Nov 43Moderate
Tue, Nov 31Low
Mon, Nov 23Moderate
Sun, Nov 13Moderate
Sat, Oct 312Low
Fri, Oct 303Moderate
Thu, Oct 292Low
 Archived NOAA/EPA forecasts, not measured UV. Only available dates are shown; missing dates are not estimated.

UV index today near Napa

CityDistancePeak today
Vallejo, CA13 mi—
Fairfield, CA15 mi—
Suisun City, CA16 mi—
Benicia, CA17 mi—
Petaluma, CA18 mi—
Vacaville, CA19 mi—
Hercules, CA19 mi—

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