Current Conditions

Rancho Cucamonga, California

49°F10°C

Showers

Wind

SW 2 mph4 km/h

Humidity

87%

Cloud Cover

40%

As of Tuesday, October 13, 2026 at 4:00 AM PDT

Today's Outlook

Day

Mostly cloudy and mild, with a high of 58°F15°C. Light wind from the SSW around 5 mph8 km/h. 90% chance of showers throughout the day. Dry air.

Night

Partly cloudy, with a low around 54°F12°C. Light wind from the SSW around 4 mph6 km/h. 29% chance of drizzle in the evening.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Showers	High 58°F15°C	Low 54°F12°C	Precip 0.04 in1 mm90%	Cloud 50%	Wind SSW 4 mph7 km/h	Monday: Mostly cloudy and mild, with a high of 58°F15°C. Light wind from the SSW around 5 mph8 km/h. 90% chance of showers throughout the day. Dry air. Monday Night: Partly cloudy, with a low around 54°F12°C. Light wind from the SSW around 4 mph6 km/h. 29% chance of drizzle in the evening.
Clear	High 67°F19°C	Low 49°F10°C	Precip 0 in0 mm—	Cloud 19%	Wind NNW 4 mph6 km/h	Tuesday: Mostly clear and mild, with a high of 67°F19°C and morning low of 50°F10°C. Light wind from the NNW around 4 mph7 km/h. Dry air. Tuesday Night: Mostly clear, with a low around 49°F10°C. Light wind from the N around 4 mph6 km/h.
Clear	High 75°F24°C	Low 49°F10°C	Precip 0 in0 mm—	Cloud 0%	Wind N 5 mph8 km/h	Wednesday: Mostly clear and warm, with a high of 75°F24°C and morning low of 51°F11°C. Light wind from the N around 5 mph7 km/h. Dry air. Wednesday Night: Mostly clear, with a low around 49°F10°C. Light wind from the N around 5 mph8 km/h.
Clear	High 79°F26°C	Low 55°F13°C	Precip 0 in0 mm—	Cloud 0%	Wind NNE 8 mph12 km/h	Thursday: Mostly clear and warm, with a high of 79°F26°C and morning low of 57°F14°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h. Dry air. Thursday Night: Mostly clear, with a low around 55°F13°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h.
Clear	High 82°F28°C	Low 63°F17°C	Precip 0 in0 mm—	Cloud 8%	Wind NE 9 mph14 km/h	Friday: Mostly clear and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the NE at 10 to 11 mph15 to 18 km/h. Dry air. Friday Night: Mostly clear, with a low around 63°F17°C. Breezy from the NE at 7 to 8 mph12 to 13 km/h.
Clear	High 81°F27°C	Low 63°F17°C	Precip 0 in0 mm—	Cloud 18%	Wind NE 6 mph9 km/h	Saturday: Mostly clear and warm, with a high of 81°F27°C and morning low of 64°F18°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. Dry air. Saturday Night: Mostly clear, with a low around 63°F17°C. Breezy from the NE at 5 to 7 mph9 to 11 km/h.
Clear	High 81°F27°C	Low 58°F15°C	Precip 0 in0 mm—	Cloud 1%	Wind W 5 mph7 km/h	Sunday: Mostly clear and warm, with a high of 81°F27°C and morning low of 60°F16°C. Light wind from the SW around 5 mph7 km/h. Dry air. Sunday Night: Mostly clear, with a low around 58°F15°C. Light wind from the NNW around 5 mph7 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	MondayOct 12	58°F15°C	54°F12°C	0.04 in1 mm· 90%	50%	Showers	SSW 4 mph7 km/h
DayMostly cloudy and mild, with a high of 58°F15°C. Light wind from the SSW around 5 mph8 km/h. 90% chance of showers throughout the day. Dry air. NightPartly cloudy, with a low around 54°F12°C. Light wind from the SSW around 4 mph6 km/h. 29% chance of drizzle in the evening.
	TuesdayOct 13	67°F19°C	49°F10°C	0 in0 mm· —	19%	Clear	NNW 4 mph6 km/h
DayMostly clear and mild, with a high of 67°F19°C and morning low of 50°F10°C. Light wind from the NNW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 49°F10°C. Light wind from the N around 4 mph6 km/h.
	WednesdayOct 14	75°F24°C	49°F10°C	0 in0 mm· —	0%	Clear	N 5 mph8 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 51°F11°C. Light wind from the N around 5 mph7 km/h. Dry air. NightMostly clear, with a low around 49°F10°C. Light wind from the N around 5 mph8 km/h.
	ThursdayOct 15	79°F26°C	55°F13°C	0 in0 mm· —	0%	Clear	NNE 8 mph12 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 57°F14°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h. Dry air. NightMostly clear, with a low around 55°F13°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h.
	FridayOct 16	82°F28°C	63°F17°C	0 in0 mm· —	8%	Clear	NE 9 mph14 km/h
DayMostly clear and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the NE at 10 to 11 mph15 to 18 km/h. Dry air. NightMostly clear, with a low around 63°F17°C. Breezy from the NE at 7 to 8 mph12 to 13 km/h.
	SaturdayOct 17	81°F27°C	63°F17°C	0 in0 mm· —	18%	Clear	NE 6 mph9 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 64°F18°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h. Dry air. NightMostly clear, with a low around 63°F17°C. Breezy from the NE at 5 to 7 mph9 to 11 km/h.
	SundayOct 18	81°F27°C	58°F15°C	0 in0 mm· —	1%	Clear	W 5 mph7 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 60°F16°C. Light wind from the SW around 5 mph7 km/h. Dry air. NightMostly clear, with a low around 58°F15°C. Light wind from the NNW around 5 mph7 km/h.
	MondayOct 19	77°F25°C	59°F15°C	0 in0 mm· —	4%	Clear	SSW 5 mph8 km/h
DayMostly clear and warm, with a high of 77°F25°C and morning low of 60°F16°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. Dry air. NightMostly clear, with a low around 59°F15°C. Breezy from the SSW at 5 to 7 mph7 to 11 km/h.
	TuesdayOct 20	66°F19°C	57°F14°C	0.06 in1.6 mm· 29%	43%	Drizzle	SSW 6 mph9 km/h
DayPartly cloudy and mild, with a high of 66°F19°C and morning low of 58°F14°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h. 20% chance of drizzle in the morning. Dry air. NightPartly cloudy, with a low around 57°F14°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. 29% chance of drizzle in the evening.
	WednesdayOct 21	63°F17°C	53°F12°C	0.17 in4.4 mm· 46%	46%	Showers	S 5 mph8 km/h
DayPartly cloudy and mild, with a high of 63°F17°C and morning low of 54°F12°C. Light wind from the S around 5 mph8 km/h. 46% chance of showers in the morning. Dry air. NightPartly cloudy, with a low around 53°F12°C. Light wind from the S around 5 mph7 km/h. 40% chance of showers overnight.
	ThursdayOct 22	67°F19°C	51°F11°C	0.08 in2.1 mm· 24%	26%	Showers	E 5 mph7 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 52°F11°C. Light wind from the SSW around 5 mph8 km/h. 24% chance of showers in the morning. Dry air. NightMostly clear, with a low around 51°F11°C. Light wind from the E around 4 mph7 km/h. 14% chance of drizzle before dawn.
	FridayOct 23	69°F21°C	52°F11°C	0.03 in0.8 mm· 11%	24%	Drizzle	SW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 69°F21°C and morning low of 53°F12°C. Light wind from the SW around 4 mph7 km/h. 11% chance of drizzle in the afternoon. Dry air. NightMostly clear, with a low around 52°F11°C. Light wind from the WSW around 4 mph7 km/h.
	SaturdayOct 24	71°F22°C	53°F12°C	0.02 in0.5 mm· 7%	24%	Clear	WSW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 54°F12°C. Light wind from the SW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 53°F12°C. Light wind from the WNW around 4 mph7 km/h.
	SundayOct 25	72°F22°C	54°F12°C	0.02 in0.5 mm· 7%	23%	Clear	NNW 4 mph7 km/h
DayMostly clear and warm, with a high of 72°F22°C and morning low of 55°F13°C. Light wind from the NNW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 54°F12°C. Light wind from the NNW around 4 mph7 km/h.
	MondayOct 26	71°F22°C	55°F13°C	0.02 in0.4 mm· 8%	27%	Clear	NW 4 mph7 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 56°F14°C. Light wind from the WNW around 4 mph7 km/h. Dry air. NightPartly cloudy, with a low around 55°F13°C. Light wind from the NW around 4 mph7 km/h.

Nearby Cities

Upland3 mi5 km Ontario4 mi7 km Montclair6 mi9 km Claremont7 mi12 km Chino9 mi14 km Jurupa Valley9 mi15 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 34.1064°N, 117.5931°W·Elevation: 368m·Timezone: America/Los_Angeles·Population: 175,236