Observed 3:35 AM PDT at KONT

Rancho Cucamonga, CA weather

Overcast and 59°15°, 14°8° colder than a typical Oct 23.

Mostly agree

Now 59°15°

Cloudy

Wind: Calm; Up to 5 mph8 km/h through 4 PM
Dew point: 55°13°; A little sticky
UV index: 0Low; Moderate 11 AM–3 PM · peak 4
Air today: 44Good; EPA forecast · PM2.5 (fine particles)
Pressure: 30 inHg1016 hPa; Steady over the last 3 h

None rain starting around 8:15 AM.

From forecast models

Next 48 hours

5°3° cooler than this time yesterday (63°17° then, 58°14° now)

Good hours for

High 66°19° today at 3 PM
Above 60°16° tomorrow by 9 AM

TonightNear 54°12° · rain chance 10% · Mostly cloudy
This morningUp to 60°16° by 11 AM · rain chance 10% · Partly cloudy
This afternoonUp to 66°19° by 3 PM · rain chance 20% · Mostly cloudy
TonightDown to 55°13° by 2 AM · rain chance 20% · Clear
Tomorrow morningUp to 68°20° by 11 AM · Clear
Tomorrow afternoonUp to 74°23° by 2 PM · Clear
Tomorrow nightDown to 60°16° by 2 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 4a	Cloudy	53°12° (likely 53°12° to 57°14°)	53°12°	10%	0 mph0 km/h, gusts 6 mph9 km/h	100%	92%	0
Fri 5a	Mostly cloudy	54°12° (likely 54°12° to 57°14°)	54°12°	5%	5 mph8 km/h from N, gusts 7 mph12 km/h	100%	76%	0
Fri 6a	Mostly cloudy	54°12° (likely 54°12° to 56°13°)	54°12°	5%	5 mph8 km/h from NE, gusts 7 mph11 km/h	100%	67%	0
Fri 7a	Mostly cloudy	53°12° (likely 53°12° to 56°13°)	53°12°	5%	0 mph0 km/h, gusts 7 mph12 km/h	100%	44%	0
Fri 8a	Sunny	55°13° (likely 55°13° to 57°14°)	55°13°	5%	5 mph8 km/h from NE, gusts 7 mph12 km/h	100%	37%	0
Fri 9a	Sunny	56°13° (likely 56°13° to 59°15°)	56°13°	5%	5 mph8 km/h from NE, gusts 7 mph11 km/h	100%	24%	1
Fri 10a	Sunny	58°14° (likely 58°14° to 61°16°)	58°14°	5%	5 mph8 km/h from E, gusts 6 mph10 km/h	100%	31%	1
Fri 11a	Sunny	60°16° (likely 60°16° to 63°17°)	60°16°	10%	5 mph8 km/h from E, gusts 6 mph9 km/h	93%	26%	3
Fri 12p	Sunny	61°16° (likely 61°16° to 65°18°)	61°16°	10%	5 mph8 km/h from E, gusts 5 mph8 km/h	90%	29%	4
Fri 1p	Partly sunny	63°17° (likely 62°17° to 66°19°)	63°17°	10%	0 mph0 km/h, gusts 5 mph8 km/h	86%	37%	4
Fri 2p	Partly sunny	64°18° (likely 63°17° to 67°19°)	64°18°	10%	0 mph0 km/h, gusts 6 mph10 km/h	82%	45%	4
Fri 3p	Cloudy	66°19° (likely 62°17° to 67°19°)	66°19°	10%	5 mph8 km/h from W, gusts 7 mph11 km/h	76%	82%	2
Fri 4p	Drizzle	66°19° (likely 61°16° to 66°19°)	66°19°	10%	5 mph8 km/h from W, gusts 7 mph11 km/h	75%	90%	1
Fri 5p	Drizzle	66°19° (likely 61°16° to 66°19°)	66°19°	20%	5 mph8 km/h from W, gusts 8 mph12 km/h	78%	96%	0
Fri 6p	Cloudy	65°18° (likely 59°15° to 65°18°)	65°18°	20%	5 mph8 km/h from W, gusts 8 mph13 km/h	80%	94%	0
Fri 7p	Showers	63°17° (likely 58°14° to 63°17°)	63°17°	20%	5 mph8 km/h from W, gusts 8 mph12 km/h	81%	62%	0
Fri 8p	Mostly clear	61°16° (likely 57°14° to 61°16°)	61°16°	20%	5 mph8 km/h from W, gusts 8 mph12 km/h	82%	27%	0
Fri 9p	Clear	60°16° (likely 56°13° to 60°16°)	60°16°	20%	5 mph8 km/h from W, gusts 4 mph6 km/h	85%	12%	0
Fri 10p	Clear	58°14° (likely 55°13° to 58°14°)	59°15°	20%	5 mph8 km/h from W, gusts 5 mph9 km/h	88%	1%	0
Fri 11p	Clear	58°14° (likely 54°12° to 58°14°)	58°14°	0%	5 mph8 km/h from W, gusts 5 mph7 km/h	88%	7%	0
Sat 12a	Clear	56°13° (likely 53°12° to 57°14°)	57°14°	0%	5 mph8 km/h from W, gusts 6 mph9 km/h	91%	8%	0
Sat 1a	Clear	56°13° (likely 53°12° to 57°14°)	56°13°	0%	0 mph0 km/h, gusts 9 mph15 km/h	93%	2%	0
Sat 2a	Clear	55°13° (likely 52°11° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 9 mph15 km/h	94%	0%	0
Sat 3a	Clear	55°13° (likely 51°11° to 57°14°)	55°13°	0%	5 mph8 km/h from SW, gusts 8 mph13 km/h	93%	1%	0
Sat 4a	Clear	55°13° (likely 51°11° to 57°14°)	55°13°	0%	5 mph8 km/h from SW, gusts 9 mph15 km/h	90%	3%	0
Sat 5a	Clear	55°13° (likely 50°10° to 57°14°)	55°13°	0%	5 mph8 km/h from SW, gusts 9 mph15 km/h	87%	3%	0
Sat 6a	Clear	54°12° (likely 50°10° to 57°14°)	54°12°	0%	5 mph8 km/h from SW, gusts 10 mph16 km/h	91%	6%	0
Sat 7a	Sunny	54°12° (likely 49°9° to 57°14°)	54°12°	0%	5 mph8 km/h from SW, gusts 9 mph15 km/h	92%	9%	0
Sat 8a	Sunny	57°14° (likely 50°10° to 58°14°)	57°14°	0%	5 mph8 km/h from SW, gusts 8 mph12 km/h	83%	10%	0
Sat 9a	Sunny	61°16° (likely 55°13° to 63°17°)	61°16°	0%	5 mph8 km/h from SW, gusts 9 mph14 km/h	71%	8%	1
Sat 10a	Sunny	65°18° (likely 60°16° to 66°19°)	65°18°	0%	5 mph8 km/h from SW, gusts 16 mph25 km/h	61%	3%	3
Sat 11a	Sunny	68°20° (likely 65°18° to 69°21°)	68°20°	0%	5 mph8 km/h from SW, gusts 14 mph23 km/h	53%	0%	4
Sat 12p	Sunny	70°21° (likely 68°20° to 71°22°)	70°21°	0%	5 mph8 km/h from SW, gusts 11 mph17 km/h	49%	0%	5
Sat 1p	Sunny	72°22° (likely 70°21° to 73°23°)	72°22°	0%	0 mph0 km/h, gusts 10 mph15 km/h	45%	0%	6
Sat 2p	Sunny	74°23° (likely 71°22° to 74°23°)	74°23°	0%	0 mph0 km/h, gusts 9 mph14 km/h	43%	0%	5
Sat 3p	Sunny	74°23° (likely 71°22° to 74°23°)	75°24°	0%	0 mph0 km/h, gusts 8 mph13 km/h	43%	0%	4
Sat 4p	Sunny	74°23° (likely 70°21° to 74°23°)	74°23°	0%	0 mph0 km/h, gusts 9 mph14 km/h	45%	0%	3
Sat 5p	Sunny	73°23° (likely 69°21° to 73°23°)	73°23°	0%	0 mph0 km/h, gusts 9 mph14 km/h	46%	0%	2
Sat 6p	Clear	71°22° (likely 66°19° to 71°22°)	71°22°	0%	0 mph0 km/h, gusts 9 mph15 km/h	50%	0%	0
Sat 7p	Clear	74°23° (likely 62°17° to 74°23°)	74°23°	0%	0 mph0 km/h, gusts 11 mph17 km/h	44%	0%	0
Sat 8p	Clear	66°19° (likely 60°16° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 9 mph14 km/h	55%	0%	0
Sat 9p	Clear	70°21° (likely 58°14° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 8 mph12 km/h	46%	0%	0
Sat 10p	Clear	69°21° (likely 57°14° to 69°21°)	69°21°	0%	5 mph8 km/h from N, gusts 5 mph9 km/h	46%	0%	0
Sat 11p	Clear	62°17° (likely 56°13° to 63°17°)	63°17°	0%	5 mph8 km/h from N, gusts 6 mph10 km/h	58%	0%	0
Sun 12a	Clear	70°21° (likely 55°13° to 70°21°)	70°21°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	45%	0%	0
Sun 1a	Clear	70°21° (likely 55°13° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 5 mph8 km/h	44%	0%	0
Sun 2a	Clear	60°16° (likely 54°12° to 65°18°)	60°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	63%	0%	0
Sun 3a	Clear	69°21° (likely 53°12° to 69°21°)	69°21°	0%	0 mph0 km/h, gusts 5 mph8 km/h	45%	0%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 23. Drizzle. High 67°19°, low 53°12°. Typical 81°27° / 54°12°. Rain 0.07 in1.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Official NWS forecast
Today: A slight chance of rain showers after 5pm. Mostly sunny, with a high near 67. Northeast wind 0 to 5 mph. Chance of precipitation is 20%.
Tonight: Mostly cloudy, with a low around 53. North wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–67°19°
Low, likely
53°12°–56°13°
Typical high / low
81°27° / 54°12°
Wind
9 mph14 km/h
UV peak
4
Tomorrow, Oct 24. Mostly sunny. High 75°24°, low 56°13°. Typical 81°27° / 53°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 58°14°
  Dry
Official NWS forecast
Day: Sunny, with a high near 75. West wind 0 to 5 mph.
Night: Mostly clear, with a low around 56. North wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–75°24°
Low, likely
49°9°–57°14°
Typical high / low
81°27° / 53°12°
Wind
10 mph16 km/h, gusts 24 mph38 km/h
UV peak
6
Sunday, Oct 25. Mostly sunny. High 77°25°, low 58°14°. Typical 81°27° / 53°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 76°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 60°16°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 77.
Night: Mostly clear, with a low around 58.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–78°26°
Low, likely
51°11°–63°17°
Typical high / low
81°27° / 53°12°
Wind
7 mph11 km/h, gusts 12 mph20 km/h
UV peak
6
Monday, Oct 26. Mostly sunny. High 79°26°, low 58°14°. Typical 80°27° / 53°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 65°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 79.
Night: Mostly clear, with a low around 58.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–79°26°
Low, likely
53°12°–65°18°
Typical high / low
80°27° / 53°12°
Wind
10 mph16 km/h, gusts 17 mph28 km/h
UV peak
5
Tuesday, Oct 27. Mostly sunny. High 77°25°, low 57°14°. Typical 80°27° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 77.
Night: Partly cloudy, with a low around 57.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–77°25°
Low, likely
49°9°–62°17°
Typical high / low
80°27° / 52°11°
Wind
9 mph14 km/h
UV peak
5
Wednesday, Oct 28. Partly sunny. High 75°24°, low 57°14°. Typical 80°27° / 52°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 75.
Night: Mostly cloudy, with a low around 57.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
69°21°–78°26°
Low, likely
49°9°–58°14°
Typical high / low
80°27° / 52°11°
Wind
9 mph14 km/h
UV peak
5
Thursday, Oct 29. Mostly cloudy. High 71°22°, low 55°13°. Typical 80°27° / 52°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 58°14°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 57°14°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 71.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
67°19°–76°24°
Low, likely
51°11°–59°15°
Typical high / low
80°27° / 52°11°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
5
Friday, Oct 30. Cloudy. High 70°21°, low 55°13°. Typical 80°27° / 52°11°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 57°14°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–76°24°
Low, likely
50°10°–58°14°
Typical high / low
80°27° / 52°11°
Wind
8 mph12 km/h, gusts 17 mph27 km/h
UV peak
5
Saturday, Oct 31. Cloudy. High 66°19°, low 56°13°. Typical 79°26° / 51°11°. Rain 0.9 in23 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  20% chance · 0.04 in1.1 mm
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  20% chance · 0.33 in8.4 mm
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  30% chance · 0.66 in17 mm
4. Overnight
  midnight–6 AM
  Cloudy, 61°16°
  40% chance · 0.36 in9.1 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
58°14°–73°23°
Low, likely
54°12°–58°14°
Typical high / low
79°26° / 51°11°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 70°21°, low 58°14°. Typical 79°26° / 51°11°. Rain 0.71 in18 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 61°16°
  40% chance · 0.49 in12 mm
2. Afternoon
  noon–6 PM
  Partly sunny, 70°21°
  50% chance · 0.16 in4 mm
3. Evening
  6 PM–midnight
  Cloudy, 67°19°
  40% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–76°24°
Low, likely
52°11°–62°17°
Typical high / low
79°26° / 51°11°
Wind
8 mph12 km/h, gusts 18 mph29 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 67°, low 53°.
Tomorrow
Dry, high 75°, low 56°, warming up.
Sunday
Dry, high 77°, low 58°.
Rest of week
Mostly dry, highs 66–79°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (SGX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

This week 8Typical 0

Heating degree days, base 65°F

Comfort

Comfortable, non-humid air (dew point 55°F).

Open the windows?

Today, 11:00 AM–9:00 PM

Good stretch to open the windows.

Is this typical?

Riverside Municipal Airport · official normals 1991–2020 · records 1998–2026

Oct 23, today vs a typical year

Today’s expected high is 14°8° colder than typical.

Last 7 days vs normal

On average 5°3° warmer than normal (daily mean temperature).

+10°+6°SatOct 17
+5°+3°SunOct 18
+6°+3°MonOct 19
+5°+3°TueOct 20
+2°+1°WedOct 21
—ThuOct 22
—FriOct 23

Rancho Cucamonga weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 11 h 4 min; Losing 1 min 57 s a day; shortest Dec 21, 1 h 12 min less
Golden hour: 5:32–6:22 PM; Morning 6:46–7:36 AM
Blue hour: 6:22–6:31 PM; Morning 6:36–6:46 AM; first light 6:36 AM

Stars tonight? Poor

Clouds most of the night (about 78% cover).

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:21 AM · rises 4:35 PM
Full moon: Oct 25
New moon: Nov 8

Looking north from Rancho Cucamonga. The highest point on the skyline is about 8,800 ft, 6 mi away.Skyline from USGS elevation data. Sky, sun and moon as they are now.