Observed 6:55 AM PDT at KRHV

Alum Rock, CA weather

Clear and 48°9°.

Mostly agree

Now 48°9°

Clear

Wind: Calm; Up to 5 mph8 km/h through 8 PM
Dew point: 45°7°; Comfortable · up to 53°12° by 3 PM
UV index: 0Low; Moderate 11 AM–5 PM · peak 5
Air quality: 30Good; Main pollutant: PM2.5 (fine particles)
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

Good hours for

Above 60°16° today by 11 AM
High 71°22° today at 3 PM
Below 60°16° tonight after 9 PM
Fog Monday from 7 AM

This morningUp to 61°16° by 11 AM · Clear
This afternoonUp to 71°22° by 3 PM · Clear
TonightDown to 53°12° by 5 AM · Clear
Tomorrow morningUp to 66°19° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 75°24° by 3 PM · Mostly cloudy
Tomorrow nightDown to 51°11° by 5 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 8a	Sunny	49°9° (likely 46°8° to 51°11°)	48°9°	0%	3 mph5 km/h from ESE, gusts 4 mph7 km/h	72%	0%	0
Sat 9a	Sunny	54°12° (likely 50°10° to 55°13°)	54°12°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	69%	1%	1
Sat 10a	Sunny	58°14° (likely 55°13° to 60°16°)	58°14°	0%	1 mph2 km/h from SW, gusts 4 mph6 km/h	66%	0%	2
Sat 11a	Sunny	61°16° (likely 58°14° to 64°18°)	61°16°	0%	2 mph3 km/h from SW, gusts 6 mph9 km/h	61%	0%	3
Sat 12p	Sunny	66°19° (likely 62°17° to 67°19°)	66°19°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	55%	0%	4
Sat 1p	Sunny	68°20° (likely 64°18° to 69°21°)	68°20°	0%	3 mph5 km/h from WNW, gusts 6 mph10 km/h	53%	0%	5
Sat 2p	Sunny	70°21° (likely 66°19° to 71°22°)	70°21°	0%	3 mph5 km/h from WNW, gusts 6 mph10 km/h	52%	0%	5
Sat 3p	Sunny	71°22° (likely 67°19° to 72°22°)	71°22°	0%	5 mph8 km/h from WNW, gusts 7 mph11 km/h	52%	0%	4
Sat 4p	Sunny	70°21° (likely 68°20° to 72°22°)	70°21°	0%	5 mph8 km/h from WNW, gusts 8 mph13 km/h	52%	0%	3
Sat 5p	Sunny	69°21° (likely 67°19° to 70°21°)	69°21°	0%	5 mph8 km/h from NW, gusts 8 mph13 km/h	54%	0%	2
Sat 6p	Clear	67°19° (likely 63°17° to 67°19°)	67°19°	0%	0 mph0 km/h, gusts 7 mph11 km/h	60%	0%	1
Sat 7p	Clear	63°17° (likely 59°15° to 64°18°)	63°17°	0%	0 mph0 km/h, gusts 5 mph8 km/h	63%	0%	0
Sat 8p	Clear	61°16° (likely 55°13° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 4 mph6 km/h	65%	0%	0
Sat 9p	Clear	59°15° (likely 53°12° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 4 mph6 km/h	66%	0%	0
Sat 10p	Clear	58°14° (likely 51°11° to 58°14°)	58°14°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	67%	2%	0
Sat 11p	Clear	57°14° (likely 49°9° to 57°14°)	57°14°	0%	2 mph3 km/h from SE, gusts 4 mph6 km/h	68%	2%	0
Sun 12a	Clear	57°14° (likely 49°9° to 57°14°)	57°14°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	66%	2%	0
Sun 1a	Clear	56°13° (likely 48°9° to 56°13°)	56°13°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	66%	1%	0
Sun 2a	Mostly clear	56°13° (likely 47°8° to 56°13°)	56°13°	0%	2 mph3 km/h from ESE, gusts 4 mph6 km/h	66%	10%	0
Sun 3a	Clear	54°12° (likely 46°8° to 54°12°)	54°12°	0%	1 mph2 km/h from ESE, gusts 3 mph5 km/h	68%	38%	0
Sun 4a	Mostly clear	54°12° (likely 45°7° to 54°12°)	54°12°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	67%	42%	0
Sun 5a	Partly cloudy	53°12° (likely 45°7° to 53°12°)	53°12°	0%	1 mph2 km/h from E, gusts 3 mph5 km/h	68%	50%	0
Sun 6a	Partly cloudy	52°11° (likely 44°7° to 52°11°)	52°11°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	68%	54%	0
Sun 7a	Partly sunny	52°11° (likely 44°7° to 52°11°)	52°11°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	72%	55%	0
Sun 8a	Partly sunny	52°11° (likely 45°7° to 52°11°)	52°11°	0%	1 mph2 km/h from ESE, gusts 4 mph7 km/h	73%	66%	0
Sun 9a	Partly sunny	56°13° (likely 50°10° to 57°14°)	57°14°	0%	1 mph2 km/h from ESE, gusts 3 mph4 km/h	70%	62%	1
Sun 10a	Cloudy	61°16° (likely 56°13° to 63°17°)	61°16°	0%	1 mph2 km/h from ESE, gusts 4 mph7 km/h	68%	65%	2
Sun 11a	Cloudy	66°19° (likely 60°16° to 68°20°)	66°19°	0%	1 mph2 km/h from WSW, gusts 7 mph11 km/h	62%	61%	3
Sun 12p	Cloudy	70°21° (likely 65°18° to 71°22°)	70°21°	0%	1 mph2 km/h from WSW, gusts 7 mph11 km/h	55%	61%	4
Sun 1p	Partly sunny	72°22° (likely 68°20° to 73°23°)	72°22°	0%	1 mph2 km/h from WSW, gusts 6 mph10 km/h	52%	74%	5
Sun 2p	Cloudy	74°23° (likely 70°21° to 74°23°)	74°23°	0%	5 mph8 km/h from W, gusts 7 mph11 km/h	50%	81%	4
Sun 3p	Cloudy	75°24° (likely 70°21° to 75°24°)	75°24°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	50%	83%	4
Sun 4p	Cloudy	73°23° (likely 69°21° to 73°23°)	73°23°	0%	5 mph8 km/h from W, gusts 9 mph14 km/h	52%	79%	3
Sun 5p	Cloudy	72°22° (likely 67°19° to 72°22°)	72°22°	0%	3 mph5 km/h from WNW, gusts 9 mph15 km/h	55%	79%	2
Sun 6p	Cloudy	69°21° (likely 63°17° to 69°21°)	69°21°	0%	3 mph5 km/h from WNW, gusts 8 mph13 km/h	62%	82%	0
Sun 7p	Cloudy	65°18° (likely 59°15° to 65°18°)	65°18°	0%	3 mph5 km/h from WNW, gusts 6 mph9 km/h	67%	80%	0
Sun 8p	Mostly clear	62°17° (likely 57°14° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	70%	74%	0
Sun 9p	Mostly clear	60°16° (likely 55°13° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	74%	62%	0
Sun 10p	Mostly clear	58°14° (likely 52°11° to 59°15°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	76%	48%	0
Sun 11p	Clear	57°14° (likely 51°11° to 58°14°)	57°14°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	78%	10%	0
Mon 12a	Clear	56°13° (likely 49°9° to 57°14°)	56°13°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	80%	16%	0
Mon 1a	Mostly clear	55°13° (likely 48°9° to 55°13°)	55°13°	0%	2 mph3 km/h from S, gusts 6 mph10 km/h	81%	33%	0
Mon 2a	Mostly clear	55°13° (likely 47°8° to 55°13°)	55°13°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	82%	60%	0
Mon 3a	Mostly clear	53°12° (likely 46°8° to 54°12°)	53°12°	0%	1 mph2 km/h from S, gusts 6 mph9 km/h	84%	49%	0
Mon 4a	Mostly clear	52°11° (likely 45°7° to 54°12°)	52°11°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	86%	47%	0
Mon 5a	Mostly clear	51°11° (likely 45°7° to 54°12°)	51°11°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	88%	42%	0
Mon 6a	Mostly clear	50°10° (likely 41°5° to 54°12°)	50°10°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	92%	54%	0
Mon 7a	Fog	49°9° (likely 43°6° to 54°12°)	49°9°	0%	1 mph2 km/h from S, gusts 3 mph5 km/h	94%	55%	0

Days ahead

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

Today, Oct 24. Sunny. High 72°22°, low 51°11°. Typical 74°23° / 51°11°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Official NWS forecast
Today: Sunny. High near 72, with temperatures falling to around 69 in the afternoon. West wind 1 to 5 mph.
Tonight: Mostly clear. Low around 51, with temperatures rising to around 53 overnight. East wind around 2 mph.
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 72°22°).
High, likely
68°20°–72°22°
Low, likely
46°8°–51°11°
Typical high / low
74°23° / 51°11°
Wind
6 mph9 km/h, gusts 13 mph22 km/h
UV peak
5
Tomorrow, Oct 25. Cloudy. High 76°24°, low 49°9°. Typical 74°23° / 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 51°11°
  Dry
Official NWS forecast
Day: Mostly sunny. High near 76, with temperatures falling to around 72 in the afternoon. West southwest wind 1 to 5 mph.
Night: Partly cloudy, with a low around 49. Southwest wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–76°24°
Low, likely
44°7°–51°11°
Typical high / low
74°23° / 51°11°
Wind
8 mph13 km/h
UV peak
5
Monday, Oct 26. Fog. High 70°21°, low 48°9°. Typical 73°23° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  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 between 7am and 9am. Sunny, with a high near 70. Southwest wind 1 to 9 mph.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–70°21°
Low, likely
44°7°–52°11°
Typical high / low
73°23° / 50°10°
Wind
10 mph16 km/h, gusts 21 mph34 km/h
UV peak
5
Tuesday, Oct 27. Fog. High 70°21°, low 49°9°. Typical 73°23° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 9am. Mostly sunny, with a high near 70.
Night: Partly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–70°21°
Low, likely
44°7°–52°11°
Typical high / low
73°23° / 50°10°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
5
Wednesday, Oct 28. Cloudy. High 70°21°, low 50°10°. Typical 73°23° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly cloudy, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–70°21°
Low, likely
47°8°–52°11°
Typical high / low
73°23° / 50°10°
Wind
10 mph16 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Fog. High 67°19°, low 49°9°. Typical 72°22° / 50°10°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog between 7am and 10am. Partly sunny, with a high near 67.
Night: A chance of rain after 11pm. Partly cloudy, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–67°19°
Low, likely
49°9°–54°12°
Typical high / low
72°22° / 50°10°
Wind
8 mph13 km/h, gusts 18 mph29 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. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Mostly sunny, with a high near 66.
Night: A chance of rain. Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–66°19°
Low, likely
46°8°–51°11°
Typical high / low
72°22° / 50°10°
Wind
10 mph16 km/h, gusts 22 mph36 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 63°17°, low 45°7°. Typical 72°22° / 49°9°. Rain 0.02 in0.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  20% chance
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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–69°21°
Low, likely
39°4°–51°11°
Typical high / low
72°22° / 49°9°
Wind
10 mph16 km/h, gusts 18 mph28 km/h
UV peak
4
Sunday, Nov 1. Sunny. High 65°18°, low 44°7°. Typical 72°22° / 49°9°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  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°–70°21°
Low, likely
38°3°–51°11°
Typical high / low
72°22° / 49°9°
Wind
10 mph16 km/h, gusts 24 mph39 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 63°17°, low 51°11°. Typical 71°22° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–64°18°
Low, likely
44°7°–61°16°
Typical high / low
71°22° / 49°9°
Wind
6 mph10 km/h, gusts 20 mph32 km/h

10 days15 days30 days

The outlook

Today
Dry, high 72°, low 51°.
Tomorrow
Dry, high 76°, low 49°, warming up.
Monday
Dry, high 70°, low 48°, 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

Upper Penitencia Creek at Piedmont Road

1.8 mi

Below flood stage

Level: 4.2 ft

Forecast peak 4.7 ft Sat 9 AM

Reading from Sat 7:30 AM · NWS gauge page

Lower Silver Creek at San Antonio St

1.6 mi

Level: 0.9 ft
Flow: 13 cfs

Reading from Sat 7:30 AM · NWS gauge page

Upper Penitencia Creek at Dorel Drive

1.8 mi

Below flood stage

Level: 7.0 ft
Flow: under 1 cfs

Reading from Sat 7:18 AM · NWS gauge page

Upper Penitencia Creek below Educational Park Drive

2.2 mi

Level: 3.4 ft

Reading from Sat 7:20 AM · NWS gauge page

For your home

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

Heating this week

About 50% less heating than a typical week.

This week 12Typical 24

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 45°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

Alum Rock weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 54 min; Losing 2 min 16 s a day; shortest Dec 21, 1 h 19 min less
Golden hour: 5:42–6:34 PM; Morning 7:07–8:00 AM
Blue hour: 6:34–6:44 PM; Morning 6:57–7:07 AM; first light 6:57 AM

Stars tonight? Fair

Mostly clear 6:44 PM–3 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:45 AM · rises 5:17 PM
Full moon: Oct 25
New moon: Nov 8

Looking east from Alum Rock. The highest point on the skyline is about 2,900 ft, 6 mi away.Skyline from USGS elevation data, heights drawn up to 2.5× taller. Sky, sun and moon as they are now.