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Current weather in Alum Rock is clear sky.

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This page shows hourly weather forecast for Alum Rock, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Alum Rock updated regularly?

Weather data for Alum Rock is updated regularly with the latest available observations and forecasts.

Now · 12:30 PM

Alum Rock Weather & Hourly Forecast

United States · California · 95127

71°F

Sunny

Feels like: 68°F

💧 Humidity 50% 🌡 Pressure 29.97 inHg 💨 Wind 5 mph 👁 Visibility 20.2 mi ☁ Clouds 5% ☀️ UV index 6.0 · High 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Alum Rock

Today

1:00 PM

Sunny

71° 💧 None 💨 5 mph H 50%29.97 inHg

4:00 PM

Sunny

69° 💧 None 💨 8 mph H 52%29.97 inHg

7:00 PM

Sunny

61° 💧 None 💨 5 mph H 70%30.00 inHg

10:00 PM

Clear night

56° 💧 None 💨 1 mph H 88%30.03 inHg

Tomorrow

1:00 AM

Clear night

55° 💧 None 💨 1 mph H 87%30.03 inHg

4:00 AM

Clear night

53° 💧 None 💨 2 mph H 82%30.06 inHg

7:00 AM

Partly cloudy

53° 💧 None 💨 3 mph H 79%30.09 inHg

10:00 AM

Sunny

62° 💧 None 💨 2 mph H 65%30.12 inHg

1:00 PM

Sunny

70° 💧 None 💨 5 mph H 47%30.09 inHg

4:00 PM

Sunny

71° 💧 None 💨 8 mph H 49%30.06 inHg

7:00 PM

Sunny

63° 💧 None 💨 5 mph H 69%30.09 inHg

10:00 PM

Clear night

58° 💧 None 💨 2 mph H 88%30.12 inHg

Friday

1:00 AM

Clear night

56° 💧 None 💨 1 mph H 89%30.12 inHg

4:00 AM

Clear night

55° 💧 None 💨 1 mph H 88%30.09 inHg

7:00 AM

Partly cloudy

54° 💧 None 💨 1 mph H 89%30.12 inHg

10:00 AM

Mostly sunny

63° 💧 0.000 in 💨 4 mph H 76%30.12 inHg

Today

1:00 PM

Sunny

71° 💧 None 💨 5 mph H 50%29.97 inHg

2:00 PM

Sunny

71° 💧 None 💨 8 mph H 50%29.97 inHg

3:00 PM

Sunny

70° 💧 None 💨 8 mph H 51%29.97 inHg

4:00 PM

Sunny

69° 💧 None 💨 8 mph H 52%29.97 inHg

5:00 PM

Sunny

66° 💧 None 💨 8 mph H 57%29.97 inHg

6:00 PM

Sunny

64° 💧 None 💨 8 mph H 63%29.97 inHg

7:00 PM

Sunny

61° 💧 None 💨 5 mph H 70%30.00 inHg

8:00 PM

Mostly clear night

59° 💧 None 💨 4 mph H 78%30.00 inHg

9:00 PM

Mostly clear night

57° 💧 None 💨 3 mph H 84%30.03 inHg

10:00 PM

Clear night

56° 💧 None 💨 1 mph H 88%30.03 inHg

11:00 PM

Clear night

55° 💧 None 💨 1 mph H 90%30.03 inHg

Tomorrow

12:00 AM

Clear night

55° 💧 None 💨 0 mph H 89%30.03 inHg

1:00 AM

Clear night

55° 💧 None 💨 1 mph H 87%30.03 inHg

2:00 AM

Clear night

54° 💧 None 💨 0 mph H 86%30.03 inHg

3:00 AM

Clear night

54° 💧 None 💨 1 mph H 85%30.03 inHg

4:00 AM

Clear night

53° 💧 None 💨 2 mph H 82%30.06 inHg

5:00 AM

Mostly clear night

53° 💧 None 💨 2 mph H 79%30.06 inHg

6:00 AM

Mostly clear night

53° 💧 None 💨 3 mph H 78%30.09 inHg

7:00 AM

Partly cloudy

53° 💧 None 💨 3 mph H 79%30.09 inHg

8:00 AM

Mostly sunny

56° 💧 None 💨 3 mph H 72%30.12 inHg

9:00 AM

Mostly sunny

59° 💧 None 💨 2 mph H 69%30.12 inHg

10:00 AM

Sunny

62° 💧 None 💨 2 mph H 65%30.12 inHg

11:00 AM

Sunny

65° 💧 None 💨 3 mph H 60%30.12 inHg

12:00 PM

Sunny

67° 💧 None 💨 4 mph H 54%30.12 inHg

1:00 PM

Sunny

70° 💧 None 💨 5 mph H 47%30.09 inHg

2:00 PM

Sunny

72° 💧 None 💨 6 mph H 41%30.09 inHg

3:00 PM

Sunny

72° 💧 None 💨 7 mph H 43%30.09 inHg

4:00 PM

Sunny

71° 💧 None 💨 8 mph H 49%30.06 inHg

5:00 PM

Sunny

69° 💧 None 💨 7 mph H 54%30.06 inHg

6:00 PM

Sunny

67° 💧 None 💨 7 mph H 60%30.06 inHg

7:00 PM

Sunny

63° 💧 None 💨 5 mph H 69%30.09 inHg

8:00 PM

Clear night

61° 💧 None 💨 6 mph H 77%30.09 inHg

9:00 PM

Clear night

59° 💧 None 💨 4 mph H 83%30.12 inHg

10:00 PM

Clear night

58° 💧 None 💨 2 mph H 88%30.12 inHg

11:00 PM

Clear night

57° 💧 None 💨 1 mph H 90%30.12 inHg

Friday

12:00 AM

Clear night

56° 💧 None 💨 1 mph H 89%30.12 inHg

1:00 AM

Clear night

56° 💧 None 💨 1 mph H 89%30.12 inHg

2:00 AM

Clear night

56° 💧 None 💨 1 mph H 88%30.12 inHg

3:00 AM

Clear night

55° 💧 None 💨 1 mph H 88%30.12 inHg

4:00 AM

Clear night

55° 💧 None 💨 1 mph H 88%30.09 inHg

5:00 AM

Mostly clear night

54° 💧 None 💨 1 mph H 87%30.09 inHg

6:00 AM

Partly cloudy night

54° 💧 None 💨 1 mph H 88%30.12 inHg

7:00 AM

Partly cloudy

54° 💧 None 💨 1 mph H 89%30.12 inHg

8:00 AM

Mist

57° 💧 None 💨 2 mph H 89%30.12 inHg

9:00 AM

Partly cloudy

60° 💧 None 💨 3 mph H 84%30.15 inHg

10:00 AM

Mostly sunny

63° 💧 0.000 in 💨 4 mph H 76%30.12 inHg

11:00 AM

Sunny

67° 💧 None 💨 5 mph H 65%30.12 inHg

12:00 PM

Sunny

70° 💧 None 💨 6 mph H 58%30.12 inHg

1:00 PM

Sunny

73° 💧 None 💨 7 mph H 52%30.09 inHg

2:00 PM

Sunny

75° 💧 None 💨 8 mph H 47%30.06 inHg

3:00 PM

Sunny

76° 💧 None 💨 8 mph H 43%30.06 inHg

4:00 PM

Sunny

75° 💧 None 💨 8 mph H 42%30.03 inHg

5:00 PM

Sunny

73° 💧 None 💨 7 mph H 45%30.03 inHg

6:00 PM

Sunny

70° 💧 None 💨 6 mph H 50%30.00 inHg

7:00 PM

Sunny

66° 💧 None 💨 3 mph H 57%30.00 inHg

8:00 PM

Clear night

63° 💧 None 💨 2 mph H 66%30.03 inHg

9:00 PM

Clear night

61° 💧 None 💨 1 mph H 70%30.03 inHg

10:00 PM

Clear night

61° 💧 None 💨 1 mph H 71%30.03 inHg

11:00 PM

Clear night

60° 💧 None 💨 0 mph H 70%30.03 inHg

Saturday

12:00 AM

Clear night

59° 💧 None 💨 0 mph H 72%30.03 inHg

1:00 AM

Clear night

58° 💧 None 💨 0 mph H 74%30.03 inHg

2:00 AM

Clear night

58° 💧 None 💨 0 mph H 76%30.03 inHg

3:00 AM

Clear night

57° 💧 None 💨 1 mph H 77%30.00 inHg

4:00 AM

Clear night

57° 💧 None 💨 1 mph H 76%30.00 inHg

5:00 AM

Clear night

57° 💧 None 💨 1 mph H 72%30.00 inHg

8:00 AM

Mostly sunny

57° 💧 None 💨 3 mph H 81%30.00 inHg

11:00 AM

Sunny

73° 💧 None 💨 2 mph H 47%30.00 inHg

2:00 PM

Sunny

83° 💧 None 💨 5 mph H 27%29.91 inHg

5:00 PM

Sunny

79° 💧 None 💨 8 mph H 35%29.88 inHg

8:00 PM

Clear night

66° 💧 None 💨 5 mph H 57%29.91 inHg

11:00 PM

Clear night

62° 💧 None 💨 2 mph H 60%29.94 inHg

Sunday

2:00 AM

Mostly cloudy night

60° 💧 None 💨 1 mph H 65%29.94 inHg

5:00 AM

Overcast night

57° 💧 None 💨 3 mph H 74%29.94 inHg

8:00 AM

Overcast

56° 💧 None 💨 4 mph H 85%29.94 inHg

11:00 AM

Overcast

64° 💧 None 💨 4 mph H 62%29.97 inHg

2:00 PM

Mostly cloudy

70° 💧 None 💨 5 mph H 48%29.94 inHg

5:00 PM

Mostly sunny

69° 💧 None 💨 7 mph H 53%29.88 inHg

8:00 PM

Clear night

59° 💧 None 💨 5 mph H 80%29.91 inHg

11:00 PM

Mostly clear night

56° 💧 None 💨 5 mph H 85%29.94 inHg

Monday

2:00 AM

Mostly cloudy night

55° 💧 None 💨 2 mph H 88%29.91 inHg

5:00 AM

Mostly cloudy night

54° 💧 None 💨 1 mph H 85%29.91 inHg

8:00 AM

Mostly cloudy

55° 💧 None 💨 2 mph H 85%29.94 inHg

11:00 AM

Mostly sunny

67° 💧 None 💨 2 mph H 57%29.94 inHg

2:00 PM

Sunny

78° 💧 None 💨 4 mph H 33%29.88 inHg

5:00 PM

Sunny

76° 💧 None 💨 5 mph H 41%29.85 inHg

8:00 PM

Clear night

65° 💧 None 💨 3 mph H 63%29.88 inHg

11:00 PM

Clear night

60° 💧 None 💨 2 mph H 78%29.91 inHg

Tuesday

5:00 AM

Clear night

60° 💧 None 💨 1 mph H 75%29.88 inHg

11:00 AM

Partly cloudy

56° 💧 None 💨 3 mph H 85%29.85 inHg

5:00 PM

Sunny

72° 💧 None 💨 2 mph H 46%29.88 inHg

11:00 PM

Clear night

79° 💧 None 💨 6 mph H 38%29.80 inHg

Wednesday

5:00 AM

Clear night

61° 💧 None 💨 1 mph H 76%29.88 inHg

11:00 AM

Mostly sunny

59° 💧 None 💨 3 mph H 56%29.85 inHg

5:00 PM

Sunny

79° 💧 None 💨 1 mph H 32%29.91 inHg

11:00 PM

Clear night

87° 💧 None 💨 4 mph H 22%29.85 inHg

Thursday

5:00 AM

Mostly clear night

64° 💧 None 💨 0 mph H 65%29.94 inHg

11:00 AM

Sunny

61° 💧 None 💨 0 mph H 50%29.91 inHg

5:00 PM

Sunny

84° 💧 None 💨 3 mph H 14%29.94 inHg

11:00 PM

Clear night

87° 💧 None 💨 7 mph H 20%29.88 inHg

Friday

5:00 AM

Clear night

68° 💧 None 💨 2 mph H 42%29.94 inHg

11:00 AM

Overcast

64° 💧 None 💨 0 mph H 43%29.91 inHg

5:00 PM

Partly cloudy

84° 💧 None 💨 3 mph H 19%29.91 inHg

11:00 PM

Partly cloudy night

88° 💧 None 💨 7 mph H 17%29.85 inHg

Saturday

5:00 AM

Mostly clear night

69° 💧 None 💨 1 mph H 43%29.88 inHg

11:00 AM

Sunny

61° 💧 None 💨 4 mph H 52%29.88 inHg

5:00 PM

Sunny

74° 💧 None 💨 2 mph H 37%29.94 inHg

11:00 PM

Clear night

75° 💧 None 💨 9 mph H 42%29.91 inHg

Sunday

5:00 AM

Clear night

59° 💧 None 💨 4 mph H 84%29.97 inHg

11:00 AM

Mostly cloudy

55° 💧 None 💨 4 mph H 96%29.94 inHg

5:00 PM

Mostly sunny

66° 💧 None 💨 3 mph H 60%29.94 inHg

11:00 PM

Clear night

72° 💧 None 💨 7 mph H 48%29.85 inHg

Monday

5:00 AM

Mostly clear night

59° 💧 None 💨 1 mph H 81%29.88 inHg

11:00 AM

Overcast

55° 💧 None 💨 1 mph H 90%29.85 inHg

5:00 PM

Mostly sunny

63° 💧 None 💨 5 mph H 61%29.91 inHg

11:00 PM

Mostly clear night

67° 💧 None 💨 10 mph H 57%29.83 inHg

Tuesday

5:00 AM

Mostly cloudy night

59° 💧 None 💨 8 mph H 86%29.88 inHg

11:00 AM

Mostly cloudy

58° 💧 None 💨 3 mph H 82%29.85 inHg

5:00 PM

Mostly sunny

62° 💧 None 💨 2 mph H 74%29.94 inHg

11:00 PM

Clear night

66° 💧 None 💨 10 mph H 46%29.88 inHg

Wednesday

5:00 AM

Clear night

53° 💧 None 💨 3 mph H 88%29.91 inHg

11:00 AM

Mostly sunny

48° 💧 None 💨 2 mph H 95%29.91 inHg

5:00 PM

Mostly sunny

61° 💧 None 💨 5 mph H 60%29.94 inHg

11:00 PM

Mostly cloudy night

62° 💧 None 💨 12 mph H 52%29.88 inHg

In Alum Rock and, more broadly, across the state of California: Today will remain mostly sunny with just a few clouds drifting by. Temperatures will climb into the mid to upper 70s, reaching up to 82 degrees in the afternoon, providing warm and comfortable conditions. Winds will be coming from the northwest at moderate speeds, averaging around 10 to 13 mph, with gusts possibly reaching 24 mph. No rain is expected throughout the rest of the day, so outdoor plans should be enjoyable. As the day progresses, expect a gentle breeze adding to the pleasant weather. Overall, it’s a fine day with mild temperatures and plenty of sunshine, making for a good afternoon outdoors.

15-Day Weather Outlook for Alum Rock

TomorrowTomorrow

Mostly sunny 72°/53° 💧 None 💨 8 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 76°/54° 💧 None 💨 8 mph

Saturday, Sep 19Sat Sep 19

Mostly sunny 83°/57° 💧 None 💨 8 mph

Sunday, Sep 20Sun Sep 20

Mostly cloudy 70°/56° 💧 None 💨 7 mph

Monday, Sep 21Mon Sep 21

Mostly cloudy 78°/54° 💧 None 💨 5 mph

Tuesday, Sep 22Tue Sep 22

Partly cloudy 79°/56° 💧 0.004 in 💨 6 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 87°/59° 💧 None 💨 4 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 87°/61° 💧 None 💨 7 mph

Friday, Sep 25Fri Sep 25

Overcast 88°/64° 💧 None 💨 7 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 75°/61° 💧 None 💨 9 mph

Sunday, Sep 27Sun Sep 27

Mostly cloudy 72°/55° 💧 0.002 in 💨 7 mph

Monday, Sep 28Mon Sep 28

Overcast 67°/55° 💧 0.001 in 💨 10 mph

Tuesday, Sep 29Tue Sep 29

Mostly sunny 66°/58° 💧 0.097 in 💨 10 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 62°/48° 💧 None 💨 12 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Alum Rock

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Alum Rock

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 PM

PM2.5 Fine particles Good 3,9µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 14,8µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 84,6µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,5µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Alum Rock

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,7High 🙂Fair

Tomorrow UV 6,8High 🙂Fair

Friday UV 6,9High 🙂Fair

Saturday UV 7,5High 🙂Fair

Sunday UV 7,0High 🙂Fair

Monday UV 8,0Very high —Unavailable

Tuesday UV 8,0Very high —Unavailable

Hourly UV index today

1:00 PMUV 6,7 2:00 PMUV 6,2 3:00 PMUV 4,9 4:00 PMUV 3,1 5:00 PMUV 1,4 6:00 PMUV 0,4 7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Alum Rock

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ALUM ROCK, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 1:00 AM–2:00 AM.

98/100Best-hour score

BEST TIME TONIGHT 1:00 AM–2:00 AM Astronomical darkness: 8:41 PM–5:23 AM

☁ Cloud cover 2% Real hourly forecast for the best viewing hour.

☾ Moonlight 30% Waxing Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 49° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min71%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Alum Rock were last refreshed today at 12:30 PM. The current forecast period extends through 18/09/2026 at 10:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.