Observed 4:40 PM PDT at KCCR

Castle Hill, CA weather

Sunny and 73°23°.

Mostly agree

Now 73°23°

Sunny

Wind: 6 mph9 km/h; From the east-northeast. Up to 6 mph9 km/h through 5 AM
Dew point: 39°4°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–4 PM · peak 4
Air quality: 36Good; Main pollutant: Ozone
Pressure: 29.97 inHg1015 hPa; Falling slowly · −0.02 inHg−0.8 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 60°16° tonight after 9 PM
Low 49°9° tomorrow at 6 AM
Above 60°16° tomorrow by 11 AM

TonightDown to 50°10° by 4 AM · Clear
Tomorrow morningUp to 61°16° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 71°22° by 3 PM · Mostly cloudy
Tomorrow nightDown to 49°9° by 5 AM · Partly cloudy
Monday morningUp to 61°16° by 11 AM · Partly cloudy
Monday afternoonNear 64°18° · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 5p	Sunny	72°22° (likely 68°20° to 72°22°)	72°22°	0%	2 mph3 km/h from NNW, gusts 7 mph11 km/h	34%	0%	2
Sat 6p	Clear	68°20° (likely 64°18° to 68°20°)	68°20°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	41%	0%	1
Sat 7p	Clear	64°18° (likely 60°16° to 64°18°)	64°18°	0%	2 mph3 km/h from WSW, gusts 6 mph9 km/h	50%	0%	0
Sat 8p	Clear	61°16° (likely 57°14° to 61°16°)	61°16°	0%	1 mph2 km/h from SW, gusts 6 mph10 km/h	58%	0%	0
Sat 9p	Clear	56°13° (likely 55°13° to 60°16°)	56°13°	0%	1 mph2 km/h from SSW, gusts 4 mph6 km/h	61%	0%	0
Sat 10p	Clear	55°13° (likely 54°12° to 59°15°)	55°13°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	63%	0%	0
Sat 11p	Clear	54°12° (likely 52°11° to 58°14°)	54°12°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	64%	0%	0
Sun 12a	Clear	53°12° (likely 51°11° to 58°14°)	53°12°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	66%	0%	0
Sun 1a	Clear	52°11° (likely 50°10° to 57°14°)	52°11°	0%	1 mph2 km/h from SSW, gusts 4 mph6 km/h	66%	0%	0
Sun 2a	Clear	52°11° (likely 49°9° to 56°13°)	52°11°	0%	1 mph2 km/h from SSW, gusts 4 mph6 km/h	67%	0%	0
Sun 3a	Clear	51°11° (likely 49°9° to 56°13°)	51°11°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	68%	4%	0
Sun 4a	Mostly clear	50°10° (likely 48°9° to 56°13°)	50°10°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	69%	10%	0
Sun 5a	Mostly clear	50°10° (likely 48°9° to 55°13°)	50°10°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	69%	17%	0
Sun 6a	Partly cloudy	49°9° (likely 48°9° to 55°13°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	71%	54%	0
Sun 7a	Cloudy	49°9° (likely 47°8° to 54°12°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	73%	59%	0
Sun 8a	Partly sunny	49°9° (likely 48°9° to 54°12°)	49°9°	0%	0 mph0 km/h, gusts 3 mph4 km/h	75%	73%	0
Sun 9a	Partly sunny	53°12° (likely 52°11° to 57°14°)	53°12°	0%	1 mph2 km/h from S, gusts 3 mph4 km/h	72%	77%	1
Sun 10a	Partly sunny	58°14° (likely 57°14° to 65°18°)	58°14°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	67%	73%	2
Sun 11a	Cloudy	61°16° (likely 61°16° to 69°21°)	61°16°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	59%	70%	3
Sun 12p	Mostly cloudy	66°19° (likely 66°19° to 72°22°)	66°19°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	53%	66%	4
Sun 1p	Partly sunny	68°20° (likely 68°20° to 74°23°)	68°20°	0%	3 mph5 km/h from W, gusts 6 mph9 km/h	49%	72%	4
Sun 2p	Cloudy	70°21° (likely 70°21° to 74°23°)	70°21°	0%	3 mph5 km/h from WSW, gusts 7 mph12 km/h	47%	80%	4
Sun 3p	Cloudy	71°22° (likely 70°21° to 73°23°)	71°22°	0%	3 mph5 km/h from W, gusts 9 mph15 km/h	45%	81%	4
Sun 4p	Cloudy	70°21° (likely 69°21° to 72°22°)	70°21°	0%	5 mph8 km/h from WSW, gusts 10 mph17 km/h	45%	83%	2
Sun 5p	Cloudy	70°21° (likely 67°19° to 70°21°)	70°21°	0%	5 mph8 km/h from WSW, gusts 11 mph18 km/h	44%	83%	1
Sun 6p	Cloudy	67°19° (likely 63°17° to 67°19°)	67°19°	0%	3 mph5 km/h from WSW, gusts 12 mph20 km/h	51%	85%	0
Sun 7p	Cloudy	61°16° (likely 59°15° to 61°16°)	61°16°	0%	3 mph5 km/h from SW, gusts 12 mph20 km/h	61%	89%	0
Sun 8p	Partly cloudy	58°14° (likely 57°14° to 58°14°)	58°14°	0%	3 mph5 km/h from SW, gusts 13 mph20 km/h	68%	78%	0
Sun 9p	Partly cloudy	56°13° (likely 55°13° to 56°13°)	56°13°	0%	3 mph5 km/h from SW, gusts 12 mph20 km/h	73%	70%	0
Sun 10p	Mostly clear	54°12° (likely 53°12° to 55°13°)	54°12°	0%	3 mph5 km/h from SW, gusts 12 mph20 km/h	78%	14%	0
Sun 11p	Clear	54°12° (likely 52°11° to 54°12°)	54°12°	0%	3 mph5 km/h from SSW, gusts 10 mph17 km/h	80%	3%	0
Mon 12a	Clear	52°11° (likely 51°11° to 53°12°)	52°11°	0%	3 mph5 km/h from SSW, gusts 11 mph17 km/h	83%	8%	0
Mon 1a	Clear	52°11° (likely 51°11° to 53°12°)	52°11°	0%	3 mph5 km/h from SSW, gusts 13 mph21 km/h	83%	17%	0
Mon 2a	Clear	51°11° (likely 51°11° to 53°12°)	51°11°	0%	3 mph5 km/h from SSW, gusts 14 mph23 km/h	84%	34%	0
Mon 3a	Partly cloudy	51°11° (likely 51°11° to 53°12°)	51°11°	0%	3 mph5 km/h from SSW, gusts 15 mph24 km/h	86%	41%	0
Mon 4a	Partly cloudy	51°11° (likely 51°11° to 54°12°)	50°10°	0%	3 mph5 km/h from SSW, gusts 16 mph26 km/h	86%	38%	0
Mon 5a	Clear	49°9° (likely 49°9° to 53°12°)	49°9°	0%	3 mph5 km/h from SSW, gusts 14 mph22 km/h	87%	36%	0
Mon 6a	Partly cloudy	50°10° (likely 50°10° to 53°12°)	49°9°	0%	3 mph5 km/h from SSW, gusts 12 mph19 km/h	90%	32%	0
Mon 7a	Partly sunny	50°10° (likely 50°10° to 53°12°)	49°9°	0%	3 mph5 km/h from SSW, gusts 9 mph14 km/h	92%	33%	0
Mon 8a	Sunny	50°10° (likely 50°10° to 53°12°)	49°9°	0%	3 mph5 km/h from SW, gusts 9 mph15 km/h	93%	25%	0
Mon 9a	Partly sunny	52°11° (likely 52°11° to 57°14°)	52°11°	0%	3 mph5 km/h from SW, gusts 14 mph22 km/h	90%	24%	1
Mon 10a	Partly sunny	57°14° (likely 57°14° to 60°16°)	57°14°	0%	3 mph5 km/h from SW, gusts 16 mph25 km/h	84%	24%	2
Mon 11a	Mostly sunny	61°16° (likely 61°16° to 64°18°)	61°16°	0%	7 mph11 km/h from W, gusts 14 mph23 km/h	78%	29%	3
Mon 12p	Mostly sunny	63°17° (likely 63°17° to 67°19°)	63°17°	0%	7 mph11 km/h from W, gusts 16 mph25 km/h	73%	19%	4
Mon 1p	Mostly sunny	65°18° (likely 65°18° to 68°20°)	65°18°	0%	7 mph11 km/h from W, gusts 15 mph24 km/h	68%	16%	5
Mon 2p	Sunny	65°18° (likely 65°18° to 68°20°)	65°18°	0%	8 mph13 km/h from W, gusts 15 mph24 km/h	65%	19%	5
Mon 3p	Mostly sunny	66°19° (likely 66°19° to 68°20°)	66°19°	0%	8 mph13 km/h from W, gusts 15 mph25 km/h	61%	14%	4
Mon 4p	Mostly sunny	65°18° (likely 64°18° to 67°19°)	65°18°	0%	8 mph13 km/h from W, gusts 16 mph25 km/h	60%	10%	3

Days ahead

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

Today, Oct 24. Sunny. High 72°22°, low 48°9°. Typical 70°21° / 50°10°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Today: Sunny, with a high near 72. North northwest wind around 2 mph.
Tonight: Mostly clear. Low around 48, with temperatures rising to around 50 overnight. South southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–74°23°
Low, likely
47°8°–53°12°
Typical high / low
70°21° / 50°10°
Wind
9 mph14 km/h, gusts 23 mph37 km/h
UV peak
5
Tomorrow, Oct 25. Partly sunny. High 72°22°, low 48°9°. Typical 70°21° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 49°9°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. West southwest wind 0 to 5 mph.
Night: Partly cloudy, with a low around 48. Southwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–74°23°
Low, likely
47°8°–53°12°
Typical high / low
70°21° / 50°10°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 66°19°, low 46°8°. Typical 70°21° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 66. West southwest wind 3 to 8 mph.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–68°20°
Low, likely
46°8°–52°11°
Typical high / low
70°21° / 49°9°
Wind
11 mph17 km/h, gusts 25 mph40 km/h
UV peak
5
Tuesday, Oct 27. Mostly sunny. High 66°19°, low 46°8°. Typical 70°21° / 49°9°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Partly cloudy, with a low around 46.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–68°20°
Low, likely
45°7°–50°10°
Typical high / low
70°21° / 49°9°
Wind
8 mph12 km/h, gusts 21 mph33 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 64°18°, low 48°9°. Typical 69°21° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 64.
Night: Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–67°19°
Low, likely
45°7°–50°10°
Typical high / low
69°21° / 49°9°
Wind
8 mph12 km/h, gusts 18 mph29 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 62°17°, low 45°7°. Typical 69°21° / 49°9°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: Mostly clear, with a low around 45.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–67°19°
Low, likely
45°7°–51°11°
Typical high / low
69°21° / 49°9°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
3
Friday, Oct 30. Rain. High 61°16°, low 44°7°. Typical 69°21° / 49°9°. Rain 0.01 in0.3 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain after 11am. Mostly sunny, with a high near 61.
Night: A slight chance of rain before 5am. Partly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–64°18°
Low, likely
43°6°–48°9°
Typical high / low
69°21° / 49°9°
Wind
11 mph18 km/h, gusts 24 mph39 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 60°16°, low 43°6°. Typical 68°20° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
57°14°–64°18°
Low, likely
40°4°–46°8°
Typical high / low
68°20° / 48°9°
Wind
8 mph13 km/h, gusts 20 mph33 km/h
UV peak
3
Sunday, Nov 1. Partly sunny. High 62°17°, low 42°6°. Typical 68°20° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–65°18°
Low, likely
38°3°–45°7°
Typical high / low
68°20° / 48°9°
Wind
8 mph12 km/h, gusts 17 mph27 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 62°17°, low 45°7°. Typical 68°20° / 48°9°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  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
58°14°–68°20°
Low, likely
43°6°–47°8°
Typical high / low
68°20° / 48°9°
Wind
6 mph10 km/h, gusts 14 mph22 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 48°.
Tomorrow
Dry, high 72°, low 48°.
Monday
Dry, high 66°, low 46°, cooling off.
Rest of week
Mostly dry, highs 60–66°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (MTR) (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

Rivers

NOAA river gauges within 25 mi

Tice Creek at Rossmoor Basin

0.8 mi

Level: 0.3 ft

Reading from Sat 3:15 PM · NWS gauge page

Walnut Creek at Ygnacio Valley Road

2.2 mi

Level: 0.2 ft

Reading from Sat 4 PM · NWS gauge page

Green Valley Creek at Diablo Road

5.1 mi

Level: 1.2 ft

Reading from Sat 3:15 PM · NWS gauge page

Grayson Creek at Taylor Blvd (City Yard)

6.1 mi

Level: 0.1 ft

Reading from Sat 3:45 PM · NWS gauge page

For your home

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

Heating this week

About 59% less heating than a typical week.

This week 16Typical 39

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 39°F).

Open the windows?

Today, 6:00 PM–8:00 PM

Good stretch to open the windows.

Is this typical?

OAKLAND INTERNATIONAL AIRPORT · official normals 1991–2020 · records 1948–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° warmer than typical.

Last 7 days vs normal

On average 0° warmer than normal (daily mean temperature).

±0°MonOct 19
±0°TueOct 20
+1°±0°WedOct 21
±0°ThuOct 22
+1°±0°FriOct 23
—SatOct 24
—SunOct 25

Castle Hill weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 53 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 21 min less
Golden hour: 5:42–6:35 PM; Morning 7:09–8:02 AM
Blue hour: 6:35–6:45 PM; Morning 6:58–7:09 AM; first light 6:58 AM

Stars tonight? Fair

Clear 6:45 PM–6 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:47 AM · rises 5:18 PM
Full moon: Oct 25
New moon: Nov 8

Looking east from Castle Hill. The highest point on the skyline is about 3,700 ft, 8 mi away.Skyline from USGS elevation data, heights drawn up to 4.5× taller. Sky, sun and moon as they are now.