🇺🇸 Weather in Rancho Cucamonga
Map Overlays:
Hourly Forecast for Rancho Cucamonga
12:00
29°
0%
13:00
30°
0%
14:00
31°
0%
15:00
30°
0%
16:00
29°
0%
17:00
27°
0%
18:00
25°
1%
19:00
22°
2%
20:00
19°
2%
21:00
19°
5%
22:00
18°
1%
23:00
17°
1%
00:00
17°
2%
01:00
16°
2%
02:00
16°
2%
03:00
15°
2%
04:00
15°
2%
05:00
14°
2%
06:00
16°
2%
07:00
17°
1%
08:00
19°
1%
09:00
20°
1%
10:00
22°
0%
11:00
24°
0%
14-Day Forecast for Rancho Cucamonga
2026-06-06
Sunny
31° /
13°
2026-06-07
Sunny
27° /
14°
2026-06-08
Sunny
28° /
13°
2026-06-09
Sunny
28° /
16°
2026-06-10
Sunny
30° /
16°
2026-06-11
Sunny
31° /
16°
2026-06-12
Sunny
33° /
17°
Additional Forecasts for Rancho Cucamonga
Air Quality
💨 US EPA Index 2 (Moderate)
CO (Carbon Monoxide) 130.0 μg/m³
O₃ (Ozone) 109.0 μg/m³
NO₂ (Nitrogen Dioxide) 5.7 μg/m³
SO₂ (Sulphur Dioxide) 2.1 μg/m³
PM2.5 (Fine particles) 16.7 μg/m³
PM10 (Coarse particles) 23.7 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United States
Weather in Rancho Cucamonga — FAQ
Answers refreshed each request based on current conditions in Rancho Cucamonga.
What is the weather like right now in Rancho Cucamonga?
Right now in Rancho Cucamonga, United States the temperature is 21.7°C (feels like 21.7°C), with partly cloudy. Relative humidity is 63% and wind is 10.4 km/h.
What is today's high and low temperature in Rancho Cucamonga?
Today's forecast high in Rancho Cucamonga is 31.2°C and the overnight low is 13.3°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Rancho Cucamonga today?
The chance of precipitation in Rancho Cucamonga today is 2%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Rancho Cucamonga differ from nearby cities?
Even short distances can change temperatures noticeably. Rancho Cucamonga's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.