Observed 3:30 AM PDT at KSTS

Santa Rosa, CA weather

Foggy and 50°10°.

Mostly agree

Now 50°10°

Fog

Wind: Calm; Up to 5 mph8 km/h through 4 PM
Visibility: 0.3 mi0.5 km; Fog · under 1 mi1.6 km
Dew point: 50°10°; Comfortable
Humidity: 100%; Air 50°10°, dew point 50°10° · fog or dew likely
UV index: 0Low; Moderate 12–4 PM · peak 4
Air quality: 24Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.01 inHg1016 hPa; Rising slowly · +0.03 inHg+1.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Fog until 10 AM
Above 60°16° today by noon
High 71°22° today at 3 PM
Below 60°16° tonight after 7 PM
Drops 12°7° tomorrow night 6–9 PM (66°19° → 54°12°)

TonightNear 49°9° · Mostly cloudy
This morningUp to 59°15° by 11 AM · Mostly cloudy
This afternoonUp to 71°22° by 3 PM · Clear
TonightDown to 46°8° by 5 AM · Clear
Tomorrow morningUp to 63°17° by 11 AM · Clear
Tomorrow afternoonUp to 75°24° by 3 PM · Clear
Tomorrow nightDown to 47°8° 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 4a	Fog	49°9° (likely 49°9° to 53°12°)	49°9°	0%	1 mph2 km/h from NNW, gusts 2 mph3 km/h	100%	84%	0
Fri 5a	Fog	48°9° (likely 48°9° to 53°12°)	49°9°	0%	1 mph2 km/h from NNW, gusts 2 mph3 km/h	100%	84%	0
Fri 6a	Fog	49°9° (likely 49°9° to 52°11°)	49°9°	0%	1 mph2 km/h from N, gusts 2 mph3 km/h	100%	84%	0
Fri 7a	Fog	47°8° (likely 47°8° to 52°11°)	47°8°	0%	1 mph2 km/h from NNW, gusts 2 mph3 km/h	100%	83%	0
Fri 8a	Fog	48°9° (likely 48°9° to 52°11°)	48°9°	0%	1 mph2 km/h from N, gusts 2 mph3 km/h	100%	73%	0
Fri 9a	Fog	51°11° (likely 51°11° to 55°13°)	51°11°	0%	1 mph2 km/h from NNW, gusts 3 mph5 km/h	100%	72%	0
Fri 10a	Partly sunny	56°13° (likely 56°13° to 58°14°)	56°13°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	100%	46%	1
Fri 11a	Mostly sunny	59°15° (likely 59°15° to 62°17°)	59°15°	0%	2 mph3 km/h from NW, gusts 8 mph12 km/h	93%	19%	2
Fri 12p	Mostly sunny	65°18° (likely 65°18° to 66°19°)	65°18°	0%	2 mph3 km/h from N, gusts 8 mph12 km/h	77%	18%	3
Fri 1p	Sunny	68°20° (likely 67°19° to 70°21°)	68°20°	0%	3 mph5 km/h from N, gusts 9 mph14 km/h	63%	17%	4
Fri 2p	Sunny	70°21° (likely 69°21° to 72°22°)	70°21°	0%	3 mph5 km/h from N, gusts 9 mph14 km/h	52%	18%	4
Fri 3p	Sunny	71°22° (likely 70°21° to 75°24°)	71°22°	0%	3 mph5 km/h from N, gusts 9 mph15 km/h	46%	12%	3
Fri 4p	Sunny	71°22° (likely 69°21° to 76°24°)	71°22°	0%	5 mph8 km/h from N, gusts 8 mph12 km/h	44%	3%	2
Fri 5p	Sunny	69°21° (likely 68°20° to 71°22°)	69°21°	0%	5 mph8 km/h from NNW, gusts 9 mph14 km/h	44%	0%	2
Fri 6p	Clear	66°19° (likely 64°18° to 67°19°)	66°19°	0%	0 mph0 km/h, gusts 6 mph9 km/h	54%	0%	1
Fri 7p	Clear	58°14° (likely 58°14° to 63°17°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	62%	0%	0
Fri 8p	Clear	56°13° (likely 54°12° to 59°15°)	56°13°	0%	0 mph0 km/h, gusts 2 mph4 km/h	62%	0%	0
Fri 9p	Clear	54°12° (likely 52°11° to 57°14°)	54°12°	0%	1 mph2 km/h from NNE, gusts 3 mph5 km/h	62%	0%	0
Fri 10p	Clear	53°12° (likely 50°10° to 56°13°)	53°12°	0%	3 mph5 km/h from N, gusts 4 mph7 km/h	62%	0%	0
Fri 11p	Clear	52°11° (likely 49°9° to 55°13°)	52°11°	0%	5 mph8 km/h from NNW, gusts 4 mph6 km/h	62%	0%	0
Sat 12a	Clear	52°11° (likely 48°9° to 56°13°)	52°11°	0%	5 mph8 km/h from NW, gusts 4 mph7 km/h	57%	0%	0
Sat 1a	Clear	51°11° (likely 47°8° to 58°14°)	51°11°	0%	3 mph5 km/h from NNW, gusts 5 mph8 km/h	58%	0%	0
Sat 2a	Clear	49°9° (likely 46°8° to 55°13°)	49°9°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	56%	0%	0
Sat 3a	Clear	48°9° (likely 46°8° to 54°12°)	48°9°	0%	2 mph3 km/h from N, gusts 3 mph5 km/h	56%	0%	0
Sat 4a	Clear	48°9° (likely 45°7° to 54°12°)	48°9°	0%	2 mph3 km/h from N, gusts 3 mph5 km/h	55%	0%	0
Sat 5a	Clear	46°8° (likely 45°7° to 55°13°)	46°8°	0%	2 mph3 km/h from NNE, gusts 2 mph3 km/h	58%	0%	0
Sat 6a	Clear	47°8° (likely 45°7° to 54°12°)	47°8°	0%	2 mph3 km/h from NNE, gusts 2 mph3 km/h	56%	0%	0
Sat 7a	Sunny	46°8° (likely 44°7° to 54°12°)	46°8°	0%	2 mph3 km/h from NNE, gusts 2 mph4 km/h	59%	0%	0
Sat 8a	Sunny	46°8° (likely 44°7° to 54°12°)	46°8°	0%	2 mph3 km/h from NNE, gusts 2 mph4 km/h	61%	0%	0
Sat 9a	Sunny	51°11° (likely 48°9° to 56°13°)	51°11°	0%	2 mph3 km/h from NNE, gusts 2 mph4 km/h	58%	0%	1
Sat 10a	Sunny	57°14° (likely 56°13° to 63°17°)	57°14°	0%	2 mph3 km/h from NNE, gusts 3 mph4 km/h	52%	0%	2
Sat 11a	Sunny	63°17° (likely 62°17° to 68°20°)	63°17°	0%	2 mph3 km/h from NNW, gusts 3 mph5 km/h	45%	0%	3
Sat 12p	Sunny	69°21° (likely 67°19° to 72°22°)	69°21°	0%	2 mph3 km/h from NNW, gusts 4 mph7 km/h	38%	2%	4
Sat 1p	Sunny	72°22° (likely 70°21° to 75°24°)	72°22°	0%	2 mph3 km/h from NNW, gusts 6 mph10 km/h	34%	5%	5
Sat 2p	Sunny	74°23° (likely 71°22° to 77°25°)	74°23°	0%	5 mph8 km/h from WSW, gusts 7 mph11 km/h	30%	7%	5
Sat 3p	Sunny	75°24° (likely 72°22° to 78°26°)	75°24°	0%	5 mph8 km/h from WSW, gusts 9 mph14 km/h	30%	9%	4
Sat 4p	Sunny	74°23° (likely 71°22° to 76°24°)	74°23°	0%	5 mph8 km/h from WSW, gusts 10 mph17 km/h	32%	32%	3
Sat 5p	Sunny	70°21° (likely 68°20° to 74°23°)	70°21°	0%	3 mph5 km/h from SW, gusts 10 mph16 km/h	40%	16%	2
Sat 6p	Clear	66°19° (likely 66°19° to 68°20°)	66°19°	0%	3 mph5 km/h from SW, gusts 9 mph14 km/h	52%	3%	1
Sat 7p	Clear	60°16° (likely 60°16° to 61°16°)	60°16°	0%	3 mph5 km/h from SW, gusts 6 mph10 km/h	65%	2%	0
Sat 8p	Clear	54°12° (likely 54°12° to 57°14°)	54°12°	0%	0 mph0 km/h, gusts 4 mph7 km/h	75%	0%	0
Sat 9p	Clear	51°11° (likely 51°11° to 56°13°)	51°11°	0%	0 mph0 km/h, gusts 4 mph6 km/h	79%	2%	0
Sat 10p	Clear	50°10° (likely 50°10° to 56°13°)	50°10°	0%	0 mph0 km/h, gusts 3 mph4 km/h	79%	16%	0
Sat 11p	Mostly clear	50°10° (likely 49°9° to 56°13°)	50°10°	0%	0 mph0 km/h, gusts 2 mph3 km/h	78%	27%	0
Sun 12a	Clear	50°10° (likely 47°8° to 59°15°)	50°10°	0%	0 mph0 km/h, gusts 2 mph3 km/h	77%	29%	0
Sun 1a	Clear	49°9° (likely 46°8° to 58°14°)	49°9°	0%	0 mph0 km/h, gusts 2 mph3 km/h	76%	28%	0
Sun 2a	Clear	48°9° (likely 44°7° to 58°14°)	49°9°	0%	0 mph0 km/h, gusts 1 mph2 km/h	76%	29%	0
Sun 3a	Mostly clear	47°8° (likely 43°6° to 57°14°)	47°8°	0%	0 mph0 km/h, gusts 1 mph2 km/h	77%	31%	0

Days ahead

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

Today, Oct 23. Fog. High 72°22°, low 46°8°. Typical 74°23° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Fog, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Today: Areas of fog before 11am. Sunny. High near 72, with temperatures falling to around 69 in the afternoon. North northwest wind 1 to 5 mph.
Tonight: Areas of fog. Partly cloudy. Low around 46, with temperatures rising to around 48 overnight. North northwest wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–76°24°
Low, likely
46°8°–51°11°
Typical high / low
74°23° / 46°8°
Wind
8 mph12 km/h
UV peak
5
Tomorrow, Oct 24. Mostly sunny. High 76°24°, low 43°6°. Typical 74°23° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 47°8°
  Dry
Official NWS forecast
Day: Sunny, with a high near 76. Northwest wind around 5 mph.
Night: Mostly clear, with a low around 43. West northwest wind 0 to 3 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
72°22°–78°26°
Low, likely
43°6°–53°12°
Typical high / low
74°23° / 46°8°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
5
Sunday, Oct 25. Partly sunny. High 73°23°, low 43°6°. Typical 74°23° / 46°8°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 73.
Night: Patchy fog after 5am. Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 73°23°).
High, likely
70°21°–74°23°
Low, likely
42°6°–52°11°
Typical high / low
74°23° / 46°8°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
4
Monday, Oct 26. Fog. High 69°21°, low 42°6°. Typical 74°23° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 9am. Mostly sunny, with a high near 69.
Night: Areas of fog after 3am. Mostly clear, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
42°6°–51°11°
Typical high / low
74°23° / 46°8°
Wind
11 mph17 km/h, gusts 20 mph32 km/h
UV peak
5
Tuesday, Oct 27. Fog. High 68°20°, low 43°6°. Typical 73°23° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 9am. Mostly sunny, with a high near 68.
Night: Patchy fog after 5am. Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–71°22°
Low, likely
41°5°–49°9°
Typical high / low
73°23° / 46°8°
Wind
9 mph15 km/h, gusts 17 mph27 km/h
UV peak
5
Wednesday, Oct 28. Fog. High 68°20°, low 43°6°. Typical 73°23° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 9am. Partly sunny, with a high near 68.
Night: Areas of fog after 2am. Partly cloudy, with a low around 43.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–72°22°
Low, likely
42°6°–49°9°
Typical high / low
73°23° / 46°8°
Wind
7 mph11 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Fog. High 67°19°, low 48°9°. Typical 72°22° / 46°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Areas of fog before 10am. Mostly sunny, with a high near 67.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–69°21°
Low, likely
46°8°–50°10°
Typical high / low
72°22° / 46°8°
Wind
7 mph11 km/h, gusts 12 mph19 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 66°19°, low 49°9°. Typical 72°22° / 45°7°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  30% 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
62°17°–70°21°
Low, likely
46°8°–54°12°
Typical high / low
72°22° / 45°7°
Wind
7 mph12 km/h, gusts 15 mph24 km/h
UV peak
4
Saturday, Oct 31. Drizzle. High 68°20°, low 51°11°. Typical 72°22° / 45°7°. Rain 0.08 in2 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  30% chance · 0.01 in0.3 mm
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  30% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  20% chance · 0.15 in3.8 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
63°17°–74°23°
Low, likely
47°8°–54°12°
Typical high / low
72°22° / 45°7°
Wind
5 mph8 km/h, gusts 12 mph19 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 68°20°, low 53°12°. Typical 71°22° / 45°7°. Rain 0.49 in12 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  20% chance · 0.25 in6.4 mm
2. Afternoon
  noon–6 PM
  Cloudy, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 62°17°
  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°–74°23°
Low, likely
47°8°–59°15°
Typical high / low
71°22° / 45°7°
Wind
7 mph11 km/h, gusts 17 mph27 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 46°.
Tomorrow
Dry, high 76°, low 43°, warming up.
Sunday
Dry, high 73°, low 43°, cooling off.
Rest of week
Mostly dry, highs 66–69°.

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

For your home

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

Heating this week

About 49% less heating than a typical week.

This week 19Typical 37

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 6
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 50°F).

Open the windows?

Today, 12:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

PETALUMA AIRPORT · official normals 1991–2020 · records 1893–2026

Oct 23, today vs a typical year

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

Last 7 days vs normal

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

+6°+3°SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
−4°−2°WedOct 21
−2°−1°ThuOct 22
—FriOct 23

Santa Rosa weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 54 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 25 min less
Golden hour: 5:45–6:38 PM; Morning 7:11–8:04 AM
Blue hour: 6:38–6:48 PM; Morning 7:01–7:11 AM; first light 7:01 AM

Stars tonight? Poor

Clouds most of the night (about 84% cover).

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:43 AM · rises 4:54 PM
Full moon: Oct 25
New moon: Nov 8

Looking northeast from Santa Rosa. The highest point on the skyline is about 4,700 ft, 25 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.