Model estimate for 5:00 AM PDT (no recent station report)

Larkspur, CA weather

Partly cloudy and 50°10°.

Mostly agree

Now 50°10°

Partly cloudy

Wind: Calm; Light through 5 PM
Dew point: 48°9°; Comfortable · up to 56°13° by 10 AM (a little sticky)
Humidity: 93%; Air 50°10°, dew point 48°9° · fog or dew likely
UV index: 0Low; Moderate 12–4 PM · peak 4
Air quality: 22Good; Main pollutant: PM2.5 (fine particles)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Fog today 7–10 AM
Above 60°16° today by 11 AM
High 71°22° today at 3 PM
Below 60°16° tonight after 8 PM

This morningUp to 62°17° by 11 AM · Partly cloudy
This afternoonUp to 71°22° by 3 PM · Clear
TonightDown to 50°10° by 5 AM · Clear
Tomorrow morningUp to 64°18° by 11 AM · Clear
Tomorrow afternoonUp to 74°23° by 3 PM · Clear
Tomorrow nightDown to 49°9° by 3 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 5a	Partly cloudy	50°10° (likely 50°10° to 56°13°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	68%	0
Fri 6a	Partly cloudy	50°10° (likely 50°10° to 55°13°)	51°11°	0%	1 mph2 km/h from NW, gusts 3 mph4 km/h	93%	44%	0
Fri 7a	Fog	50°10° (likely 50°10° to 55°13°)	50°10°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	95%	40%	0
Fri 8a	Fog	50°10° (likely 50°10° to 55°13°)	50°10°	0%	1 mph2 km/h from NNW, gusts 5 mph9 km/h	96%	58%	0
Fri 9a	Fog	53°12° (likely 53°12° to 58°14°)	53°12°	0%	2 mph3 km/h from NNW, gusts 7 mph11 km/h	96%	55%	0
Fri 10a	Partly sunny	58°14° (likely 58°14° to 61°16°)	58°14°	0%	2 mph3 km/h from N, gusts 8 mph13 km/h	91%	31%	1
Fri 11a	Sunny	62°17° (likely 61°16° to 64°18°)	62°17°	0%	3 mph5 km/h from NNE, gusts 11 mph17 km/h	84%	17%	2
Fri 12p	Mostly sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	2 mph3 km/h from NNE, gusts 12 mph19 km/h	77%	23%	3
Fri 1p	Mostly sunny	68°20° (likely 64°18° to 68°20°)	68°20°	0%	2 mph3 km/h from NE, gusts 12 mph19 km/h	69%	22%	4
Fri 2p	Sunny	70°21° (likely 66°19° to 70°21°)	70°21°	0%	2 mph3 km/h from NE, gusts 11 mph17 km/h	60%	21%	4
Fri 3p	Sunny	71°22° (likely 66°19° to 71°22°)	71°22°	0%	2 mph3 km/h from NE, gusts 10 mph17 km/h	54%	16%	3
Fri 4p	Sunny	71°22° (likely 66°19° to 72°22°)	71°22°	0%	2 mph3 km/h from N, gusts 10 mph15 km/h	52%	9%	2
Fri 5p	Sunny	71°22° (likely 65°18° to 71°22°)	71°22°	0%	1 mph2 km/h from NW, gusts 8 mph12 km/h	52%	4%	2
Fri 6p	Clear	68°20° (likely 63°17° to 68°20°)	68°20°	0%	1 mph2 km/h from WNW, gusts 6 mph9 km/h	58%	0%	1
Fri 7p	Clear	62°17° (likely 60°16° to 64°18°)	62°17°	0%	1 mph2 km/h from WNW, gusts 10 mph17 km/h	64%	0%	0
Fri 8p	Clear	59°15° (likely 58°14° to 63°17°)	59°15°	0%	1 mph2 km/h from WNW, gusts 11 mph18 km/h	69%	0%	0
Fri 9p	Clear	57°14° (likely 56°13° to 63°17°)	57°14°	0%	0 mph0 km/h, gusts 10 mph17 km/h	71%	0%	0
Fri 10p	Clear	56°13° (likely 55°13° to 64°18°)	56°13°	0%	0 mph0 km/h, gusts 9 mph14 km/h	72%	0%	0
Fri 11p	Clear	55°13° (likely 54°12° to 64°18°)	55°13°	0%	0 mph0 km/h, gusts 9 mph14 km/h	72%	8%	0
Sat 12a	Clear	55°13° (likely 54°12° to 64°18°)	55°13°	0%	0 mph0 km/h, gusts 10 mph16 km/h	66%	9%	0
Sat 1a	Clear	54°12° (likely 52°11° to 63°17°)	54°12°	0%	0 mph0 km/h, gusts 9 mph15 km/h	64%	9%	0
Sat 2a	Clear	52°11° (likely 51°11° to 62°17°)	52°11°	0%	0 mph0 km/h, gusts 8 mph13 km/h	62%	5%	0
Sat 3a	Clear	52°11° (likely 51°11° to 60°16°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	62%	0%	0
Sat 4a	Clear	51°11° (likely 51°11° to 58°14°)	51°11°	0%	0 mph0 km/h, gusts 4 mph7 km/h	61%	0%	0
Sat 5a	Clear	50°10° (likely 50°10° to 57°14°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	61%	0%	0
Sat 6a	Clear	50°10° (likely 49°9° to 58°14°)	50°10°	0%	0 mph0 km/h, gusts 5 mph8 km/h	61%	0%	0
Sat 7a	Sunny	50°10° (likely 49°9° to 57°14°)	50°10°	0%	0 mph0 km/h, gusts 5 mph7 km/h	62%	0%	0
Sat 8a	Sunny	50°10° (likely 49°9° to 56°13°)	50°10°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	63%	1%	0
Sat 9a	Sunny	54°12° (likely 53°12° to 60°16°)	54°12°	0%	1 mph2 km/h from NE, gusts 4 mph6 km/h	60%	1%	1
Sat 10a	Sunny	60°16° (likely 58°14° to 66°19°)	60°16°	0%	1 mph2 km/h from NE, gusts 3 mph5 km/h	52%	1%	2
Sat 11a	Sunny	64°18° (likely 62°17° to 69°21°)	64°18°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	45%	1%	3
Sat 12p	Sunny	68°20° (likely 64°18° to 71°22°)	69°21°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	41%	1%	4
Sat 1p	Sunny	71°22° (likely 66°19° to 73°23°)	71°22°	0%	1 mph2 km/h from NE, gusts 3 mph5 km/h	37%	4%	5
Sat 2p	Sunny	73°23° (likely 67°19° to 75°24°)	73°23°	0%	0 mph0 km/h, gusts 4 mph6 km/h	33%	2%	5
Sat 3p	Sunny	74°23° (likely 68°20° to 75°24°)	75°24°	0%	0 mph0 km/h, gusts 6 mph9 km/h	34%	1%	4
Sat 4p	Sunny	74°23° (likely 68°20° to 75°24°)	74°23°	0%	0 mph0 km/h, gusts 5 mph7 km/h	37%	10%	3
Sat 5p	Sunny	72°22° (likely 67°19° to 74°23°)	73°23°	0%	0 mph0 km/h, gusts 6 mph10 km/h	42%	2%	2
Sat 6p	Clear	69°21° (likely 63°17° to 71°22°)	69°21°	0%	0 mph0 km/h, gusts 7 mph11 km/h	50%	4%	1
Sat 7p	Clear	63°17° (likely 60°16° to 66°19°)	63°17°	0%	0 mph0 km/h, gusts 5 mph8 km/h	59%	0%	0
Sat 8p	Clear	58°14° (likely 57°14° to 64°18°)	58°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	67%	0%	0
Sat 9p	Clear	55°13° (likely 55°13° to 60°16°)	55°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	73%	11%	0
Sat 10p	Clear	53°12° (likely 53°12° to 59°15°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	76%	14%	0
Sat 11p	Clear	52°11° (likely 52°11° to 58°14°)	52°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	78%	32%	0
Sun 12a	Clear	51°11° (likely 51°11° to 57°14°)	51°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	80%	21%	0
Sun 1a	Clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	80%	12%	0
Sun 2a	Mostly clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	0 mph0 km/h, gusts 3 mph5 km/h	80%	19%	0
Sun 3a	Clear	49°9° (likely 49°9° to 56°13°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	81%	26%	0
Sun 4a	Mostly clear	49°9° (likely 49°9° to 56°13°)	49°9°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	21%	0

Days ahead

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

Today, Oct 23. Cloudy. High 72°22°, low 50°10°. Typical 69°21° / 54°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Fog, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Official NWS forecast
Today: Patchy fog between 7am and 10am. Sunny, with a high near 72. North wind around 3 mph.
Tonight: Partly cloudy, with a low around 50. Wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–72°22°
Low, likely
50°10°–54°12°
Typical high / low
69°21° / 54°12°
Wind
10 mph15 km/h, gusts 16 mph25 km/h
UV peak
5
Tomorrow, Oct 24. Mostly sunny. High 75°24°, low 47°8°. Typical 69°21° / 54°12°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 75. North northeast wind around 1 mph.
Night: Mostly clear, with a low around 47. Wind around 0 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
68°20°–75°24°
Low, likely
47°8°–56°13°
Typical high / low
69°21° / 54°12°
Wind
10 mph15 km/h
UV peak
5
Sunday, Oct 25. Cloudy. High 73°23°, low 48°9°. Typical 69°21° / 54°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 73.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–73°23°
Low, likely
48°9°–54°12°
Typical high / low
69°21° / 54°12°
Wind
6 mph10 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 47°8°. Typical 69°21° / 54°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–69°21°
Low, likely
47°8°–55°13°
Typical high / low
69°21° / 54°12°
Wind
10 mph17 km/h, gusts 23 mph37 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 69°21°, low 47°8°. Typical 69°21° / 53°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Partly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–69°21°
Low, likely
47°8°–53°12°
Typical high / low
69°21° / 53°12°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
5
Wednesday, Oct 28. Partly sunny. High 68°20°, low 48°9°. Typical 68°20° / 53°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 68.
Night: Partly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–68°20°
Low, likely
48°9°–53°12°
Typical high / low
68°20° / 53°12°
Wind
8 mph12 km/h
UV peak
4
Thursday, Oct 29. Fog. High 66°19°, low 54°12°. Typical 68°20° / 53°12°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog between 7am and 9am. Mostly sunny, with a high near 66.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
52°11°–55°13°
Typical high / low
68°20° / 53°12°
Wind
7 mph11 km/h, gusts 13 mph21 km/h
UV peak
2
Friday, Oct 30. Drizzle. High 64°18°, low 54°12°. Typical 68°20° / 53°12°. Rain 0.07 in1.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  30% chance
4. Overnight
  midnight–6 AM
  Partly cloudy, 56°13°
  30% chance · 0.01 in0.3 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–66°19°
Low, likely
53°12°–56°13°
Typical high / low
68°20° / 53°12°
Wind
8 mph12 km/h, gusts 15 mph24 km/h
UV peak
4
Saturday, Oct 31. Drizzle. High 63°17°, low 55°13°. Typical 68°20° / 53°12°. Rain 0.11 in2.8 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 57°14°
  30% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Drizzle, 64°18°
  30% chance · 0.02 in0.6 mm
3. Evening
  6 PM–midnight
  Drizzle, 60°16°
  30% chance · 0.04 in0.9 mm
4. Overnight
  midnight–6 AM
  Drizzle, 57°14°
  30% chance · 0.2 in5.2 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–67°19°
Low, likely
53°12°–57°14°
Typical high / low
68°20° / 53°12°
Wind
9 mph14 km/h, gusts 16 mph25 km/h
UV peak
3
Sunday, Nov 1. Showers. High 62°17°, low 57°14°. Typical 68°20° / 53°12°. Rain 0.81 in21 mm, 30% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Drizzle, 56°13°
  30% chance · 0.32 in8.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 62°17°
  20% chance · 0.11 in2.7 mm
3. Evening
  6 PM–midnight
  Showers, 60°15°
  20% chance · 0.28 in7.1 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 agreeIndependent forecasts are close; the range is narrow.
High, likely
60°16°–63°17°
Low, likely
54°12°–60°16°
Typical high / low
68°20° / 53°12°
Wind
17 mph27 km/h, gusts 29 mph46 km/h

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 50°.
Tomorrow
Dry, high 75°, low 47°, warming up.
Sunday
Dry, high 73°, low 48°.
Rest of week
Mostly dry, highs 62–69°.

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

Corte Madera Creek at Ross

2.1 mi

Below flood stage

Level: 4.2 ft
Flow: 1 cfs

Reading from Fri 4:30 AM · NWS gauge page

Arroyo Corte Madera del Presidio

3.0 mi

Below flood stage

Level: 2.7 ft

Reading from Thu 11:05 PM · NWS gauge page

San Anselmo Creek at Bridge Street

3.1 mi

Below flood stage

Level: 1.2 ft

Reading from Fri 12:50 AM · NWS gauge page

Coyote Creek (Marin) at Tam Valley

4.3 mi

Below flood stage

Level: 2.0 ft

Reading from Fri 4:35 AM · NWS gauge page

For your home

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

Heating this week

About 44% less heating than a typical week.

This week 15Typical 27

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 48°F).

Open the windows?

Today, 11:00 AM–7:00 PM

Good stretch to open the windows.

Is this typical?

San Francisco Downtown · official normals 1991–2020 · records 1874–2026

Oct 23, today vs a typical year

Today’s expected high is 3°2° warmer than typical.

Last 7 days vs normal

On average 1° warmer than normal (daily mean temperature).

+11°+6°SatOct 17
−3°−2°SunOct 18
−2°−1°MonOct 19
−1°TueOct 20
+1°WedOct 21
—ThuOct 22
—FriOct 23

Larkspur weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 55 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 23 min less
Golden hour: 5:45–6:38 PM; Morning 7:10–8:03 AM
Blue hour: 6:38–6:48 PM; Morning 6:59–7:10 AM; first light 6:59 AM

Stars tonight? Poor

Clouds most of the night (about 56% cover).

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:42 AM · rises 4:53 PM
Full moon: Oct 25
New moon: Nov 8

Looking west from Larkspur. The highest point on the skyline is about 2,500 ft, 3 mi away.Skyline from USGS elevation data, heights drawn up to 2× taller. Sky, sun and moon as they are now.

Larkspur, CA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Corte Madera Creek at Ross

Arroyo Corte Madera del Presidio

San Anselmo Creek at Bridge Street

Coyote Creek (Marin) at Tam Valley

For your home

Heating this week

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon