Observed 10:35 AM PDT at KSJC

Cupertino, CA weather

Sunny and 63°17°.

Mostly agree

Now 63°17°

Sunny

Wind: Calm; Up to 5 mph8 km/h through 10 PM
Dew point: 46°8°; Comfortable
UV index: 1Low; Moderate 11 AM–4 PM · peak 5
Air quality: 51Moderate; PM2.5 (fine particles) · tomorrow good
Pressure: 30.06 inHg1018 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (61°16° then, 59°15° now)

Good hours for

High 72°22° today at 3 PM
Below 60°16° tonight after 9 PM
Low 50°10° tomorrow at 6 AM
Above 60°16° tomorrow by 10 AM
Fog Monday 7–9 AM

This morningUp to 63°17° by 11 AM · Clear
This afternoonUp to 72°22° by 3 PM · Clear
TonightDown to 51°11° by 5 AM · Clear
Tomorrow morningUp to 67°19° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 75°24° by 3 PM · Mostly cloudy
Tomorrow nightDown to 50°10° by 4 AM · Partly cloudy
Monday morningUp to 54°12° by 9 AM · Partly 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 10a	Sunny	59°15° (likely 56°13° to 63°17°)	59°15°	0%	3 mph5 km/h from NNW, gusts 7 mph11 km/h	57%	0%	1
Sat 11a	Sunny	63°17° (likely 61°16° to 66°19°)	63°17°	0%	3 mph5 km/h from NNW, gusts 8 mph13 km/h	49%	0%	3
Sat 12p	Sunny	67°19° (likely 63°17° to 67°19°)	67°19°	0%	3 mph5 km/h from NNW, gusts 7 mph11 km/h	45%	0%	4
Sat 1p	Sunny	69°21° (likely 65°18° to 70°21°)	69°21°	0%	3 mph5 km/h from N, gusts 5 mph9 km/h	44%	0%	5
Sat 2p	Sunny	70°21° (likely 67°19° to 72°22°)	70°21°	0%	5 mph8 km/h from N, gusts 6 mph9 km/h	44%	0%	4
Sat 3p	Sunny	72°22° (likely 68°20° to 73°23°)	72°22°	0%	5 mph8 km/h from N, gusts 6 mph9 km/h	44%	0%	3
Sat 4p	Sunny	71°22° (likely 68°20° to 74°23°)	71°22°	0%	5 mph8 km/h from N, gusts 7 mph11 km/h	44%	0%	2
Sat 5p	Sunny	71°22° (likely 67°19° to 72°22°)	71°22°	0%	5 mph8 km/h from NNW, gusts 7 mph12 km/h	44%	0%	2
Sat 6p	Clear	68°20° (likely 64°18° to 68°20°)	68°20°	0%	2 mph3 km/h from N, gusts 7 mph12 km/h	52%	0%	1
Sat 7p	Clear	63°17° (likely 59°15° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 6 mph10 km/h	57%	0%	0
Sat 8p	Clear	60°16° (likely 56°13° to 60°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	62%	0%	0
Sat 9p	Clear	59°15° (likely 53°12° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	63%	0%	0
Sat 10p	Clear	57°14° (likely 51°11° to 57°14°)	57°14°	0%	1 mph2 km/h from SSW, gusts 5 mph7 km/h	65%	0%	0
Sat 11p	Clear	56°13° (likely 49°9° to 56°13°)	56°13°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	66%	0%	0
Sun 12a	Clear	56°13° (likely 48°9° to 56°13°)	56°13°	0%	1 mph2 km/h from S, gusts 5 mph7 km/h	65%	0%	0
Sun 1a	Clear	55°13° (likely 47°8° to 55°13°)	55°13°	0%	1 mph2 km/h from S, gusts 4 mph6 km/h	64%	0%	0
Sun 2a	Clear	54°12° (likely 47°8° to 55°13°)	54°12°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	65%	0%	0
Sun 3a	Mostly clear	53°12° (likely 47°8° to 54°12°)	53°12°	0%	1 mph2 km/h from S, gusts 3 mph4 km/h	65%	19%	0
Sun 4a	Mostly clear	52°11° (likely 46°8° to 54°12°)	52°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	66%	49%	0
Sun 5a	Partly cloudy	51°11° (likely 46°8° to 53°12°)	51°11°	0%	0 mph0 km/h, gusts 3 mph4 km/h	67%	55%	0
Sun 6a	Partly cloudy	50°10° (likely 45°7° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 2 mph4 km/h	69%	50%	0
Sun 7a	Partly sunny	50°10° (likely 45°7° to 52°11°)	50°10°	0%	0 mph0 km/h, gusts 2 mph3 km/h	71%	52%	0
Sun 8a	Mostly cloudy	51°11° (likely 46°8° to 53°12°)	51°11°	0%	1 mph2 km/h from SE, gusts 2 mph3 km/h	71%	64%	0
Sun 9a	Mostly cloudy	56°13° (likely 50°10° to 57°14°)	56°13°	0%	1 mph2 km/h from SE, gusts 3 mph4 km/h	66%	66%	1
Sun 10a	Mostly cloudy	62°17° (likely 55°13° to 62°17°)	62°17°	0%	1 mph2 km/h from SE, gusts 2 mph4 km/h	61%	69%	2
Sun 11a	Partly sunny	67°19° (likely 60°16° to 67°19°)	67°19°	0%	1 mph2 km/h from N, gusts 5 mph7 km/h	54%	75%	3
Sun 12p	Partly sunny	71°22° (likely 64°18° to 71°22°)	71°22°	0%	1 mph2 km/h from N, gusts 5 mph8 km/h	50%	72%	4
Sun 1p	Partly sunny	73°23° (likely 67°19° to 73°23°)	73°23°	0%	1 mph2 km/h from N, gusts 7 mph11 km/h	48%	69%	4
Sun 2p	Cloudy	74°23° (likely 69°21° to 74°23°)	74°23°	0%	5 mph8 km/h from NW, gusts 8 mph13 km/h	48%	75%	4
Sun 3p	Cloudy	75°24° (likely 71°22° to 75°24°)	75°24°	0%	5 mph8 km/h from NW, gusts 8 mph13 km/h	48%	79%	3
Sun 4p	Cloudy	73°23° (likely 68°20° to 73°23°)	73°23°	0%	5 mph8 km/h from NW, gusts 9 mph14 km/h	48%	78%	2
Sun 5p	Cloudy	72°22° (likely 66°19° to 72°22°)	72°22°	0%	2 mph3 km/h from NW, gusts 8 mph13 km/h	50%	80%	1
Sun 6p	Cloudy	69°21° (likely 63°17° to 69°21°)	69°21°	0%	2 mph3 km/h from NW, gusts 8 mph12 km/h	59%	79%	0
Sun 7p	Cloudy	65°18° (likely 59°15° to 65°18°)	65°18°	0%	2 mph3 km/h from NW, gusts 8 mph13 km/h	67%	78%	0
Sun 8p	Cloudy	61°16° (likely 56°13° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph9 km/h	73%	74%	0
Sun 9p	Cloudy	58°14° (likely 54°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 4 mph7 km/h	77%	67%	0
Sun 10p	Mostly clear	56°13° (likely 52°11° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	80%	37%	0
Sun 11p	Clear	55°13° (likely 50°10° to 56°13°)	55°13°	0%	2 mph3 km/h from SW, gusts 5 mph8 km/h	81%	0%	0
Mon 12a	Clear	54°12° (likely 49°9° to 54°12°)	54°12°	0%	2 mph3 km/h from SW, gusts 4 mph6 km/h	83%	6%	0
Mon 1a	Clear	53°12° (likely 48°9° to 53°12°)	53°12°	0%	2 mph3 km/h from SW, gusts 4 mph6 km/h	83%	8%	0
Mon 2a	Mostly clear	52°11° (likely 48°9° to 53°12°)	52°11°	0%	1 mph2 km/h from SW, gusts 3 mph5 km/h	84%	18%	0
Mon 3a	Mostly clear	51°11° (likely 47°8° to 52°11°)	51°11°	0%	1 mph2 km/h from SW, gusts 3 mph4 km/h	85%	34%	0
Mon 4a	Mostly clear	50°10° (likely 46°8° to 53°12°)	50°10°	0%	1 mph2 km/h from SW, gusts 4 mph6 km/h	86%	49%	0
Mon 5a	Partly cloudy	50°10° (likely 46°8° to 54°12°)	50°10°	0%	1 mph2 km/h from SW, gusts 3 mph5 km/h	88%	42%	0
Mon 6a	Partly cloudy	48°9° (likely 42°6° to 56°13°)	49°9°	0%	1 mph2 km/h from SW, gusts 4 mph6 km/h	91%	38%	0
Mon 7a	Fog	48°9° (likely 42°6° to 56°13°)	48°9°	0%	1 mph2 km/h from SW, gusts 4 mph7 km/h	94%	46%	0
Mon 8a	Fog	49°9° (likely 43°6° to 56°13°)	49°9°	0%	2 mph3 km/h from WSW, gusts 4 mph7 km/h	94%	48%	0
Mon 9a	Partly sunny	54°12° (likely 48°9° to 58°14°)	54°12°	0%	2 mph3 km/h from WSW, gusts 5 mph7 km/h	88%	45%	1

Days ahead

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

Today, Oct 24. Sunny. High 72°22°, low 50°10°. Typical 74°23° / 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 63°17°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 51°11°
  Dry
Official NWS forecast
Today: Sunny, with a high near 72. North northwest wind around 5 mph.
Tonight: Mostly clear, with a low around 50. West wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–74°23°
Low, likely
45°7°–52°11°
Typical high / low
74°23° / 51°11°
Wind
6 mph10 km/h, gusts 15 mph23 km/h
UV peak
5
Tomorrow, Oct 25. Cloudy. High 76°24°, low 48°9°. Typical 74°23° / 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 50°10°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 76, with temperatures falling to around 72 in the afternoon. North wind 0 to 5 mph.
Night: Partly cloudy, with a low around 48. West northwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–76°24°
Low, likely
45°7°–52°11°
Typical high / low
74°23° / 51°11°
Wind
7 mph12 km/h, gusts 14 mph23 km/h
UV peak
4
Monday, Oct 26. Fog. High 70°21°, low 46°8°. Typical 73°23° / 50°10°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Partly sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  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 70. West northwest wind 1 to 9 mph.
Night: Patchy fog after 5am. Mostly clear, with a low around 46.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–70°21°
Low, likely
45°7°–51°11°
Typical high / low
73°23° / 50°10°
Wind
10 mph16 km/h, gusts 20 mph31 km/h
UV peak
5
Tuesday, Oct 27. Fog. High 69°21°, low 48°9°. Typical 73°23° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 10am. Mostly sunny, with a high near 69.
Night: Partly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
43°6°–52°11°
Typical high / low
73°23° / 50°10°
Wind
9 mph14 km/h, gusts 17 mph28 km/h
UV peak
5
Wednesday, Oct 28. Mostly cloudy. High 70°21°, low 49°9°. Typical 73°23° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 70.
Night: Mostly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–70°21°
Low, likely
45°7°–52°11°
Typical high / low
73°23° / 50°10°
Wind
8 mph13 km/h
UV peak
4
Thursday, Oct 29. Rain. High 67°19°, low 49°9°. Typical 72°22° / 50°10°. Rain, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog between 7am and 9am, then a slight chance of rain. Partly sunny, with a high near 67.
Night: A chance of rain. Partly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
49°9°–54°12°
Typical high / low
72°22° / 50°10°
Wind
8 mph12 km/h, gusts 16 mph25 km/h
UV peak
4
Friday, Oct 30. Rain. High 66°19°, low 48°9°. Typical 72°22° / 50°10°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 45°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and patchy fog. Partly sunny, with a high near 66.
Night: A chance of rain. Mostly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
60°16°–66°19°
Low, likely
45°7°–49°9°
Typical high / low
72°22° / 50°10°
Wind
9 mph14 km/h, gusts 21 mph33 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 62°17°, low 45°7°. Typical 72°22° / 49°9°. Rain 0.04 in1 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  20% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  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
61°16°–66°19°
Low, likely
40°4°–49°9°
Typical high / low
72°22° / 49°9°
Wind
6 mph10 km/h, gusts 17 mph28 km/h
UV peak
4
Sunday, Nov 1. Sunny. High 64°18°, low 45°7°. Typical 72°22° / 49°9°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°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
59°15°–69°21°
Low, likely
38°3°–51°11°
Typical high / low
72°22° / 49°9°
Wind
9 mph14 km/h, gusts 24 mph38 km/h
UV peak
4
Monday, Nov 2. Rain. High 63°17°, low 49°9°. Typical 71°22° / 49°9°. Rain 0.19 in4.8 mm, 10% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 56°13°
  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
61°16°–65°18°
Low, likely
46°8°–54°12°
Typical high / low
71°22° / 49°9°
Wind
5 mph8 km/h, gusts 21 mph33 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 50°.
Tomorrow
Dry, high 76°, low 48°, warming up.
Monday
Dry, high 70°, low 46°, cooling off.
Rest of week
Mostly dry, highs 62–70°.

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

Stevens Creek below Interstate 280

1.4 mi

Level: 3.3 ft
Flow: 2 cfs

Reading from Sat 9 AM · NWS gauge page

Calabazas Creek at Rainbow Creek

1.6 mi

Level: 1.0 ft

Reading from Sat 9 AM · NWS gauge page

Stevens Creek below Stevens Creek Reservoir

1.8 mi

Below flood stage

Level: 2.1 ft
Flow: 2 cfs

Reading from Sat 9:15 AM · NWS gauge page

Stevens Creek Stevens Creek Reservoir

2.2 mi

Level: 528 ft
Flow: 2,470 cfs

Reading from Sat 9 AM · NWS gauge page

For your home

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

Heating this week

About 42% less heating than a typical week.

This week 14Typical 24

Heating degree days, base 65°F

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?

San Jose · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

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

+1°±0°SunOct 18
±0°MonOct 19
−2°−1°TueOct 20
±0°WedOct 21
−3°−2°ThuOct 22
±0°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 54 min; Losing 2 min 11 s a day; shortest Dec 21, 1 h 19 min less
Golden hour: 5:43–6:35 PM; Morning 7:08–8:00 AM
Blue hour: 6:35–6:45 PM; Morning 6:58–7:08 AM; first light 6:58 AM

Stars tonight? Fair

Mostly clear 6:45 PM–4 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:46 AM · rises 5:18 PM
Full moon: Oct 25
New moon: Nov 8

Looking southwest from Cupertino. The highest point on the skyline is about 3,200 ft, 7 mi away.Skyline from USGS elevation data, heights drawn up to 4× taller. Sky, sun and moon as they are now.

Cupertino, CA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Stevens Creek below Interstate 280

Calabazas Creek at Rainbow Creek

Stevens Creek below Stevens Creek Reservoir

Stevens Creek Stevens Creek Reservoir

For your home

Heating this week

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon