Protection on Nov 410 AM–3 PMUV 3 or higher, local time
Solar noon11:35 AMwhen the sun is highest
Sunrise · sunset6:14 AM · 4:55 PMlocal time
Peak5around 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 meansHourly UV forecast
| Hour | UV index | Exposure |
|---|---|---|
| 7 AM | 0 | Low |
| 8 AM | 1 | Low |
| 9 AM | 2 | Low |
| 10 AM | 3 | Moderate |
| 11 AM | 4 | Moderate |
| 12 PM | 5 | Moderate |
| 1 PM | 4 | Moderate |
| 2 PM | 3 | Moderate |
| 3 PM | 1 | Low |
Recent UV forecasts in Rancho Cucamonga
Across 7 available forecast dates from Oct 29, 2026 to Nov 4, 2026, the forecast peak ranged from 3 to 5 (highest on Nov 2, 2026).
| Date | Peak UV | Exposure |
|---|---|---|
| Wed, Nov 4 | 5 | Moderate |
| Tue, Nov 3 | 5 | Moderate |
| Mon, Nov 2 | 5 | Moderate |
| Sun, Nov 1 | 4 | Moderate |
| Sat, Oct 31 | 3 | Moderate |
| Fri, Oct 30 | 4 | Moderate |
| Thu, Oct 29 | 4 | Moderate |
UV index today near Rancho Cucamonga
| City | Distance | Peak today |
|---|---|---|
| Upland, CA | 5.6 mi | — |
| Fontana, CA | 6.2 mi | — |
| Ontario, CA | 6.8 mi | — |
| Claremont, CA | 8.7 mi | — |
| Montclair, CA | 8.7 mi | — |
| Rialto, CA | 9.9 mi | — |
| Jurupa Valley, CA | 11 mi | — |
| Eastvale, CA | 12 mi | — |
| La Verne, CA | 12 mi | — |
| Chino, CA | 12 mi | — |
More: California UV index · Rancho Cucamonga frost dates · Newport Beach water temperature · UV index explained