Wednesday, November 4

UV index forecast in Boulder, Colorado

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 Boulder

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 noon11:45 AMwhen the sun is highest
Sunrise · sunset6:35 AM · 4:55 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 4PM
Boulder 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
4 PM0Low
 NOAA/EPA UV Index forecast for ZIP 80310, local time. Forecast retrieved Nov 4, 2026 at 12:59 PM MST.

Recent UV forecasts in Boulder

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

DatePeak UVExposure
Wed, Nov 43Moderate
Tue, Nov 33Moderate
Mon, Nov 22Low
Sun, Nov 13Moderate
Sat, Oct 314Moderate
Fri, Oct 304Moderate
Thu, Oct 294Moderate
 Archived NOAA/EPA forecasts, not measured UV. Only available dates are shown; missing dates are not estimated.

UV index today near Boulder

CityDistancePeak today
Lafayette, CO8.1 mi—
Erie, CO11 mi—
Broomfield, CO12 mi—
Longmont, CO12 mi—
Westminster, CO14 mi—
Arvada, CO14 mi—
Northglenn, CO16 mi—

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