Rancho Cucamonga, California Climate
United States
Pop. 175,236 Elev. 371 m / 1,217 ft
TZ: America/Los_Angeles (UTC-7) ·
Rancho Cucamonga has a dry climate with hot summers reaching 93°F (34°C) in August and cool winters averaging 41°F (5°C) in January. Humidity pushes the summer feels-like temperature to around 99°F (37°C). Rain falls on about 24 days per year (21.9 in / 557 mm total). The city averages 230 sunny days per year. Ocean water temperatures reach 73°F (23°C) in summer.
| Temperature | 93°F (34°C) high | 41°F (5°C) low |
| Feels like | 99°F (37°C) high | 41°F (5°C) low |
| Rain | 24 days | 21.9 in (557 mm) /yr |
| Sky | 230 sunny | 11 stormy |
| Wind | 2.1 mph (1.0 m/s) avg |
Looking for a place with a climate like Rancho Cucamonga? Explore and filter 150,000+ cities worldwide.
Explore on the MapMonthly Climate Chart
Best months to visit: Jan, Apr, May, Jun, Sep, Oct
Sky & Air by Month
Cloud cover (%)
33
Jan 54
Feb 54
Mar 40
Apr 42
May 23
Jun 13
Jul 15
Aug 29
Sep 22
Oct 43
Nov 38
Dec Humidity (%)
33
Jan 59
Feb 64
Mar 56
Apr 56
May 55
Jun 51
Jul 47
Aug 55
Sep 52
Oct 58
Nov 56
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 4 mi Ontario International Airport (ONT)
Ski resort 12 mi Mt. Baldy Resort
National park 27 mi Silverado Ridge Preserve
Mountain peak
(5,801 ft) 6 mi Calamity Peak
Hospital 1 mi Kaiser Permanente Racho Cucamonga Medical Offices
Hiking trail 8 mi Cobal Canyon Trail
Interested in Rancho Cucamonga?
Hotels
Flights
Real Estate
Insurance
Connectivity
Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 66°F 19°C | 41°F 5°C | 0.9 in 24 mm | — | 17 |
| February | 69°F 21°C | 46°F 8°C | 4.4 in 111 mm | — | 10 |
| March | 66°F 19°C | 47°F 8°C | 3.6 in 91 mm | — | 11 |
| April | 72°F 22°C | 50°F 10°C | 0.9 in 22 mm | — | 12 |
| May | 80°F 27°C | 57°F 14°C | 0.4 in 10 mm | — | 15 |
| June | 86°F 30°C | 62°F 17°C | 0.1 in 2 mm | — | 26 |
| July | 88°F 31°C | 64°F 18°C | 0.0 in 1 mm | — | 29 |
| August | 93°F 34°C | 68°F 20°C | 0.0 in 1 mm | — | 29 |
| September | 87°F 31°C | 66°F 19°C | 0.6 in 15 mm | — | 21 |
| October | 81°F 27°C | 55°F 13°C | 1.8 in 46 mm | — | 24 |
| November | 73°F 23°C | 51°F 10°C | 4.9 in 124 mm | — | 18 |
| December | 70°F 21°C | 47°F 8°C | 4.3 in 109 mm | — | 18 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 17 | 1 |
| February | 10 | 1 |
| March | 11 | 2 |
| April | 12 | 0 |
| May | 15 | 0 |
| June | 26 | 0 |
| July | 29 | 0 |
| August | 29 | 0 |
| September | 21 | 1 |
| October | 24 | 0 |
| November | 18 | 3 |
| December | 18 | 3 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 59°F 15°C | 51°F 11°C |
| February | 59°F 15°C | 54°F 12°C |
| March | 59°F 15°C | 57°F 14°C |
| April | 61°F 16°C | 63°F 17°C |
| May | 66°F 19°C | 69°F 21°C |
| June | 68°F 20°C | 75°F 24°C |
| July | 70°F 21°C | 77°F 25°C |
| August | 73°F 23°C | 81°F 27°C |
| September | 72°F 22°C | 79°F 26°C |
| October | 69°F 21°C | 70°F 21°C |
| November | 67°F 19°C | 64°F 18°C |
| December | 65°F 18°C | 56°F 13°C |