Observed 12:10 AM PDT at KCCR

Clayton, CA weather

Clear and 54°12°.

Mostly agree

Now 54°12°

Clear

Wind: 5 mph7 km/h; From the south. Up to 9 mph14 km/h through 12 PM
Dew point: 46°8°; Comfortable · down to 34°1° by 1 AM (dry)
UV index: 0Low; Moderate 11 AM–5 PM · peak 5
Air quality: 30Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.04 inHg1017 hPa; Steady over the next 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

7°4° cooler than this time yesterday (59°15° then, 52°11° now)

Good hours for

Low 48°9° tonight at 5 AM
Above 60°16° today by 11 AM
High 73°23° today at 3 PM
Below 60°16° tonight after 9 PM

TonightDown to 48°9° by 5 AM · Clear
This morningUp to 63°17° by 11 AM · Clear
This afternoonUp to 73°23° by 3 PM · Clear
TonightDown to 49°9° by 5 AM · Clear
Tomorrow morningUp to 63°17° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 74°23° by 3 PM · Mostly cloudy
Tomorrow nightDown to 55°13° by 11 PM · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 12a	Clear	54°12° (likely 52°11° to 56°13°)	54°12°	0%	1 mph2 km/h from SW, gusts 6 mph9 km/h	49%	0%	0
Sat 1a	Clear	54°12° (likely 51°11° to 55°13°)	54°12°	0%	1 mph2 km/h from SSE, gusts 6 mph10 km/h	48%	0%	0
Sat 2a	Clear	52°11° (likely 51°11° to 54°12°)	52°11°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	47%	0%	0
Sat 3a	Clear	51°11° (likely 51°11° to 54°12°)	51°11°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	46%	0%	0
Sat 4a	Clear	50°10° (likely 50°10° to 54°12°)	50°10°	0%	1 mph2 km/h from ENE, gusts 6 mph10 km/h	47%	0%	0
Sat 5a	Clear	48°9° (likely 48°9° to 54°12°)	48°9°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	46%	0%	0
Sat 6a	Clear	49°9° (likely 49°9° to 53°12°)	49°9°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	49%	0%	0
Sat 7a	Sunny	48°9° (likely 48°9° to 54°12°)	48°9°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	51%	0%	0
Sat 8a	Sunny	49°9° (likely 49°9° to 55°13°)	48°9°	0%	3 mph5 km/h from E, gusts 5 mph8 km/h	51%	0%	0
Sat 9a	Sunny	55°13° (likely 55°13° to 57°14°)	55°13°	0%	6 mph10 km/h from ENE, gusts 6 mph9 km/h	48%	0%	1
Sat 10a	Sunny	59°15° (likely 58°14° to 61°16°)	59°15°	0%	7 mph11 km/h from NE, gusts 9 mph14 km/h	48%	0%	2
Sat 11a	Sunny	63°17° (likely 61°16° to 63°17°)	63°17°	0%	9 mph14 km/h from NE, gusts 13 mph21 km/h	45%	0%	3
Sat 12p	Sunny	67°19° (likely 63°17° to 67°19°)	67°19°	0%	8 mph13 km/h from NNE, gusts 13 mph21 km/h	43%	0%	4
Sat 1p	Sunny	70°21° (likely 65°18° to 70°21°)	70°21°	0%	7 mph11 km/h from NNE, gusts 11 mph17 km/h	41%	0%	5
Sat 2p	Sunny	71°22° (likely 67°19° to 71°22°)	71°22°	0%	6 mph10 km/h from NNE, gusts 10 mph15 km/h	40%	0%	5
Sat 3p	Sunny	73°23° (likely 68°20° to 73°23°)	73°23°	0%	5 mph8 km/h from NNE, gusts 7 mph12 km/h	38%	0%	4
Sat 4p	Sunny	73°23° (likely 68°20° to 73°23°)	73°23°	0%	3 mph5 km/h from NNE, gusts 6 mph10 km/h	37%	0%	3
Sat 5p	Sunny	73°23° (likely 67°19° to 73°23°)	73°23°	0%	3 mph5 km/h from N, gusts 5 mph8 km/h	37%	0%	2
Sat 6p	Clear	70°21° (likely 64°18° to 70°21°)	70°21°	0%	2 mph3 km/h from N, gusts 2 mph4 km/h	42%	1%	1
Sat 7p	Clear	63°17° (likely 60°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 6 mph9 km/h	48%	40%	0
Sat 8p	Clear	60°16° (likely 57°14° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 6 mph10 km/h	52%	24%	0
Sat 9p	Clear	58°14° (likely 54°12° to 60°16°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	54%	2%	0
Sat 10p	Clear	56°13° (likely 53°12° to 60°16°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	56%	18%	0
Sat 11p	Clear	55°13° (likely 52°11° to 59°15°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	54%	14%	0
Sun 12a	Clear	54°12° (likely 51°11° to 58°14°)	54°12°	0%	0 mph0 km/h, gusts 5 mph7 km/h	54%	0%	0
Sun 1a	Clear	53°12° (likely 50°10° to 57°14°)	53°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	57%	0%	0
Sun 2a	Clear	52°11° (likely 49°9° to 56°13°)	52°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	59%	0%	0
Sun 3a	Clear	50°10° (likely 48°9° to 55°13°)	50°10°	0%	0 mph0 km/h, gusts 5 mph7 km/h	60%	8%	0
Sun 4a	Clear	50°10° (likely 47°8° to 54°12°)	50°10°	0%	0 mph0 km/h, gusts 5 mph7 km/h	62%	22%	0
Sun 5a	Mostly clear	49°9° (likely 47°8° to 53°12°)	49°9°	0%	0 mph0 km/h, gusts 5 mph7 km/h	63%	55%	0
Sun 6a	Mostly clear	47°8° (likely 46°8° to 52°11°)	47°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	67%	65%	0
Sun 7a	Mostly sunny	47°8° (likely 46°8° to 51°11°)	47°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	71%	70%	0
Sun 8a	Partly sunny	48°9° (likely 46°8° to 51°11°)	48°9°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	71%	54%	0
Sun 9a	Partly sunny	53°12° (likely 49°9° to 54°12°)	53°12°	0%	2 mph3 km/h from NE, gusts 5 mph7 km/h	66%	63%	1
Sun 10a	Partly sunny	59°15° (likely 52°11° to 59°15°)	59°15°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	64%	81%	2
Sun 11a	Mostly sunny	63°17° (likely 56°13° to 63°17°)	63°17°	0%	5 mph8 km/h from NNE, gusts 5 mph9 km/h	59%	70%	3
Sun 12p	Cloudy	67°19° (likely 61°16° to 67°19°)	67°19°	0%	5 mph8 km/h from NNE, gusts 6 mph10 km/h	56%	72%	4
Sun 1p	Mostly sunny	70°21° (likely 64°18° to 70°21°)	70°21°	0%	5 mph8 km/h from NNE, gusts 7 mph11 km/h	50%	72%	4
Sun 2p	Mostly sunny	72°22° (likely 67°19° to 72°22°)	72°22°	0%	5 mph8 km/h from NW, gusts 7 mph12 km/h	47%	81%	4
Sun 3p	Cloudy	74°23° (likely 68°20° to 74°23°)	74°23°	0%	5 mph8 km/h from NW, gusts 7 mph11 km/h	45%	80%	3
Sun 4p	Cloudy	73°23° (likely 67°19° to 73°23°)	73°23°	0%	5 mph8 km/h from NW, gusts 8 mph12 km/h	44%	82%	3
Sun 5p	Cloudy	73°23° (likely 65°18° to 73°23°)	73°23°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	43%	84%	1
Sun 6p	Mostly clear	70°21° (likely 65°18° to 70°21°)	70°21°	0%	3 mph5 km/h from W, gusts 6 mph10 km/h	48%	76%	0
Sun 7p	Mostly clear	66°19° (likely 60°16° to 66°19°)	66°19°	0%	3 mph5 km/h from W, gusts 5 mph9 km/h	54%	75%	0
Sun 8p	Mostly clear	60°16° (likely 56°13° to 61°16°)	61°16°	0%	1 mph2 km/h from WSW, gusts 6 mph10 km/h	60%	66%	0
Sun 9p	Mostly clear	58°14° (likely 53°12° to 59°15°)	58°14°	0%	1 mph2 km/h from WSW, gusts 8 mph13 km/h	63%	62%	0
Sun 10p	Mostly clear	56°13° (likely 50°10° to 58°14°)	56°13°	0%	1 mph2 km/h from WSW, gusts 9 mph15 km/h	65%	54%	0
Sun 11p	Mostly clear	55°13° (likely 49°9° to 57°14°)	55°13°	0%	1 mph2 km/h from WSW, gusts 10 mph16 km/h	66%	50%	0

Days ahead

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

Today, Oct 24. Sunny. High 74°23°, low 47°8°. Typical 69°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Today: Sunny, with a high near 74. Northeast wind 2 to 9 mph, with gusts as high as 20 mph.
Tonight: Clear, with a low around 47. East southeast wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–74°23°
Low, likely
47°8°–53°12°
Typical high / low
69°21° / 52°11°
Wind
6 mph10 km/h, gusts 16 mph25 km/h
UV peak
5
Tomorrow, Oct 25. Mostly sunny. High 75°24°, low 47°8°. Typical 69°21° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Official NWS forecast
Day: Sunny, with a high near 75. North wind 0 to 5 mph.
Night: Mostly clear, with a low around 47. West southwest wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–75°24°
Low, likely
45°7°–51°11°
Typical high / low
69°21° / 52°11°
Wind
6 mph10 km/h, gusts 13 mph21 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 71°22°, low 44°7°. Typical 68°20° / 52°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 71.
Night: Mostly clear, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–71°22°
Low, likely
44°7°–52°11°
Typical high / low
68°20° / 52°11°
Wind
11 mph17 km/h, gusts 22 mph35 km/h
UV peak
5
Tuesday, Oct 27. Mostly sunny. High 70°21°, low 45°7°. Typical 68°20° / 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70.
Night: Partly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–70°21°
Low, likely
45°7°–50°10°
Typical high / low
68°20° / 51°11°
Wind
10 mph16 km/h, gusts 17 mph27 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 69°21°, low 46°8°. Typical 68°20° / 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°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 69.
Night: Mostly cloudy, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–69°21°
Low, likely
43°6°–50°10°
Typical high / low
68°20° / 51°11°
Wind
8 mph13 km/h
UV peak
5
Thursday, Oct 29. Rain. High 67°19°, low 46°8°. Typical 67°19° / 51°11°. Rain, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 56°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain after 5pm. Mostly sunny, with a high near 67.
Night: A chance of rain. Partly cloudy, with a low around 46.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–67°19°
Low, likely
46°8°–51°11°
Typical high / low
67°19° / 51°11°
Wind
10 mph16 km/h, gusts 17 mph28 km/h
UV peak
4
Friday, Oct 30. Rain. High 66°19°, low 47°8°. Typical 67°19° / 50°10°. Rain 0.06 in1.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  20% chance · 0.02 in0.5 mm
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  30% chance · 0.03 in0.8 mm
3. Evening
  6 PM–midnight
  Partly cloudy, 53°12°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 66.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
56°13°–68°20°
Low, likely
44°7°–50°10°
Typical high / low
67°19° / 50°10°
Wind
8 mph13 km/h, gusts 17 mph28 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 63°17°, low 45°7°. Typical 66°19° / 50°10°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 55°13°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  20% 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
59°15°–68°20°
Low, likely
37°3°–49°9°
Typical high / low
66°19° / 50°10°
Wind
6 mph9 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 66°19°, low 47°8°. Typical 66°19° / 50°10°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 49°9°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 59°15°
  20% chance
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  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
63°17°–71°22°
Low, likely
40°4°–55°13°
Typical high / low
66°19° / 50°10°
Wind
8 mph13 km/h, gusts 17 mph27 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 68°20°, low 52°11°. Typical 66°19° / 50°10°. Rain 0.02 in0.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 69°21°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 60°15°
  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
62°17°–77°25°
Low, likely
49°9°–58°14°
Typical high / low
66°19° / 50°10°
Wind
7 mph11 km/h, gusts 15 mph25 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 74°, low 47°.
Tomorrow
Dry, high 75°, low 47°.
Monday
Dry, high 71°, low 44°, cooling off.
Rest of week
Mostly dry, highs 63–70°.

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

Marsh Creek Reservoir

12 mi

Action stage

Level: 169 ft

Reading from Fri 10:30 PM · NWS gauge page

Galindo Creek at Treat Blvd

3.7 mi

Level: 0.0 ft

Reading from Fri 10:15 PM · NWS gauge page

Marsh Creek at March Creek Fire

4.8 mi

Level: 0.0 ft

Reading from Fri 10:30 PM · NWS gauge page

Walnut Creek at Diamond Blvd Bridge

7.0 mi

Level: 2.1 ft

Reading from Fri 10:15 PM · NWS gauge page

For your home

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

Heating this week

About 61% less heating than a typical week.

This week 15Typical 38

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 2
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 46°F).

Open the windows?

Today, 11:00 AM–8:00 PM

Good stretch to open the windows.

Is this typical?

MOUNT DIABLO JUNCTION · official normals 1991–2020 · records 1952–2026

Oct 24, today vs a typical year

Today’s expected high is 5°3° warmer than typical.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Clayton 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: 5:41–6:34 PM; Morning 7:08–8:01 AM
Blue hour: 6:34–6:44 PM; Morning 6:58–7:08 AM; first light 6:58 AM

Stars tonight? Good

Clear 12:37–6:58 AM; moon 96% lit, sets 5:46 AM.

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:46 AM · rises 5:17 PM
Full moon: Oct 25
New moon: Nov 8

Looking south from Clayton. The highest point on the skyline is about 3,700 ft, 4 mi away.Skyline from USGS elevation data, heights drawn up to 2.5× taller. Sky, sun and moon as they are now.