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Current weather in Alto is clear sky.

Where can I find the hourly weather forecast for Alto?

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

Is the weather forecast for Alto updated regularly?

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

Now · 1:05 AM

Alto Weather & Hourly Forecast

United States · California · 94941

56°F

Clear night

Feels like: 56°F

💧 Humidity 94% 🌡 Pressure 29.97 inHg 💨 Wind 3 mph 👁 Visibility 5.2 mi ☁ Clouds 0% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Alto

Today

2:00 AM

Clear night

56° 💧 None 💨 4 mph H 93%29.97 inHg

5:00 AM

Clear night

55° 💧 None 💨 3 mph H 94%29.97 inHg

8:00 AM

Sunny

58° 💧 None 💨 3 mph H 89%30.00 inHg

11:00 AM

Sunny

66° 💧 None 💨 6 mph H 70%29.97 inHg

2:00 PM

Sunny

70° 💧 None 💨 9 mph H 54%29.94 inHg

5:00 PM

Sunny

68° 💧 None 💨 10 mph H 56%29.94 inHg

8:00 PM

Clear night

61° 💧 None 💨 7 mph H 77%29.91 inHg

11:00 PM

Clear night

58° 💧 None 💨 1 mph H 85%29.94 inHg

Tomorrow

2:00 AM

Clear night

56° 💧 None 💨 1 mph H 96%29.94 inHg

5:00 AM

Mist at night

54° 💧 None 💨 2 mph H 100%29.94 inHg

8:00 AM

Fog

55° 💧 None 💨 3 mph H 98%29.97 inHg

11:00 AM

Sunny

67° 💧 None 💨 0 mph H 62%30.00 inHg

2:00 PM

Mostly sunny

75° 💧 None 💨 4 mph H 44%29.94 inHg

5:00 PM

Sunny

75° 💧 None 💨 8 mph H 57%29.88 inHg

8:00 PM

Clear night

68° 💧 None 💨 5 mph H 51%29.91 inHg

11:00 PM

Clear night

64° 💧 None 💨 2 mph H 60%29.91 inHg

Today

2:00 AM

Clear night

56° 💧 None 💨 4 mph H 93%29.97 inHg

3:00 AM

Clear night

55° 💧 None 💨 3 mph H 93%29.94 inHg

4:00 AM

Clear night

55° 💧 None 💨 3 mph H 94%29.94 inHg

5:00 AM

Clear night

55° 💧 None 💨 3 mph H 94%29.97 inHg

6:00 AM

Clear night

55° 💧 None 💨 3 mph H 94%29.97 inHg

7:00 AM

Sunny

54° 💧 None 💨 3 mph H 95%29.97 inHg

8:00 AM

Sunny

58° 💧 None 💨 3 mph H 89%30.00 inHg

9:00 AM

Sunny

60° 💧 None 💨 3 mph H 82%30.00 inHg

10:00 AM

Sunny

63° 💧 None 💨 4 mph H 76%30.00 inHg

11:00 AM

Sunny

66° 💧 None 💨 6 mph H 70%29.97 inHg

12:00 PM

Sunny

68° 💧 None 💨 7 mph H 64%29.97 inHg

1:00 PM

Sunny

69° 💧 None 💨 8 mph H 58%29.97 inHg

2:00 PM

Sunny

70° 💧 None 💨 9 mph H 54%29.94 inHg

3:00 PM

Sunny

70° 💧 None 💨 10 mph H 51%29.94 inHg

4:00 PM

Sunny

69° 💧 None 💨 10 mph H 52%29.94 inHg

5:00 PM

Sunny

68° 💧 None 💨 10 mph H 56%29.94 inHg

6:00 PM

Sunny

66° 💧 None 💨 9 mph H 61%29.91 inHg

7:00 PM

Sunny

63° 💧 None 💨 8 mph H 70%29.91 inHg

8:00 PM

Clear night

61° 💧 None 💨 7 mph H 77%29.91 inHg

9:00 PM

Clear night

60° 💧 None 💨 5 mph H 81%29.94 inHg

10:00 PM

Clear night

59° 💧 None 💨 3 mph H 83%29.94 inHg

11:00 PM

Clear night

58° 💧 None 💨 1 mph H 85%29.94 inHg

Tomorrow

12:00 AM

Clear night

57° 💧 None 💨 1 mph H 89%29.94 inHg

1:00 AM

Clear night

56° 💧 None 💨 1 mph H 94%29.94 inHg

2:00 AM

Clear night

56° 💧 None 💨 1 mph H 96%29.94 inHg

3:00 AM

Clear night

55° 💧 None 💨 1 mph H 99%29.94 inHg

4:00 AM

Mist at night

55° 💧 None 💨 1 mph H 100%29.94 inHg

5:00 AM

Mist at night

54° 💧 None 💨 2 mph H 100%29.94 inHg

6:00 AM

Mist at night

54° 💧 None 💨 3 mph H 100%29.94 inHg

7:00 AM

Fog

54° 💧 None 💨 3 mph H 100%29.97 inHg

8:00 AM

Fog

55° 💧 None 💨 3 mph H 98%29.97 inHg

9:00 AM

Partly cloudy

58° 💧 None 💨 2 mph H 92%30.00 inHg

10:00 AM

Mostly sunny

62° 💧 None 💨 1 mph H 77%30.00 inHg

11:00 AM

Sunny

67° 💧 None 💨 0 mph H 62%30.00 inHg

12:00 PM

Sunny

72° 💧 None 💨 1 mph H 51%29.97 inHg

1:00 PM

Sunny

74° 💧 None 💨 2 mph H 45%29.94 inHg

2:00 PM

Mostly sunny

75° 💧 None 💨 4 mph H 44%29.94 inHg

3:00 PM

Mostly sunny

75° 💧 None 💨 6 mph H 50%29.91 inHg

4:00 PM

Mostly sunny

75° 💧 None 💨 7 mph H 56%29.91 inHg

5:00 PM

Sunny

75° 💧 None 💨 8 mph H 57%29.88 inHg

6:00 PM

Sunny

74° 💧 None 💨 7 mph H 50%29.88 inHg

7:00 PM

Sunny

71° 💧 None 💨 6 mph H 50%29.88 inHg

8:00 PM

Clear night

68° 💧 None 💨 5 mph H 51%29.91 inHg

9:00 PM

Clear night

67° 💧 None 💨 4 mph H 51%29.91 inHg

10:00 PM

Clear night

66° 💧 None 💨 1 mph H 56%29.91 inHg

11:00 PM

Clear night

64° 💧 None 💨 2 mph H 60%29.91 inHg

Tuesday

12:00 AM

Clear night

62° 💧 None 💨 3 mph H 66%29.91 inHg

1:00 AM

Clear night

61° 💧 None 💨 4 mph H 72%29.91 inHg

2:00 AM

Clear night

59° 💧 None 💨 3 mph H 78%29.91 inHg

3:00 AM

Clear night

58° 💧 None 💨 2 mph H 82%29.91 inHg

4:00 AM

Clear night

57° 💧 None 💨 2 mph H 83%29.91 inHg

5:00 AM

Clear night

57° 💧 None 💨 2 mph H 85%29.91 inHg

6:00 AM

Clear night

56° 💧 None 💨 2 mph H 88%29.94 inHg

7:00 AM

Sunny

56° 💧 None 💨 1 mph H 90%29.94 inHg

8:00 AM

Sunny

59° 💧 None 💨 1 mph H 85%29.97 inHg

9:00 AM

Sunny

64° 💧 None 💨 0 mph H 74%29.97 inHg

10:00 AM

Sunny

68° 💧 None 💨 1 mph H 62%29.97 inHg

11:00 AM

Sunny

72° 💧 None 💨 2 mph H 53%29.97 inHg

12:00 PM

Sunny

75° 💧 None 💨 3 mph H 48%29.97 inHg

1:00 PM

Sunny

77° 💧 None 💨 4 mph H 45%29.94 inHg

2:00 PM

Mostly sunny

77° 💧 0.000 in 💨 6 mph H 48%29.94 inHg

3:00 PM

Overcast

76° 💧 None 💨 7 mph H 53%29.94 inHg

4:00 PM

Overcast

75° 💧 None 💨 6 mph H 55%29.91 inHg

5:00 PM

Overcast

71° 💧 None 💨 8 mph H 59%29.91 inHg

8:00 PM

Overcast night

70° 💧 None 💨 5 mph H 58%29.94 inHg

11:00 PM

Overcast night

68° 💧 None 💨 1 mph H 56%30.00 inHg

Wednesday

2:00 AM

Overcast night

66° 💧 None 💨 3 mph H 61%30.00 inHg

5:00 AM

Overcast night

68° 💧 None 💨 2 mph H 56%30.00 inHg

8:00 AM

Overcast

68° 💧 None 💨 3 mph H 58%30.03 inHg

11:00 AM

Mostly sunny

78° 💧 None 💨 3 mph H 39%30.06 inHg

2:00 PM

Sunny

87° 💧 None 💨 2 mph H 32%30.00 inHg

5:00 PM

Sunny

90° 💧 None 💨 1 mph H 30%29.94 inHg

8:00 PM

Clear night

80° 💧 None 💨 6 mph H 34%29.97 inHg

11:00 PM

Clear night

77° 💧 None 💨 3 mph H 36%30.00 inHg

Thursday

2:00 AM

Mostly clear night

74° 💧 None 💨 3 mph H 44%29.97 inHg

5:00 AM

Mostly clear night

69° 💧 None 💨 2 mph H 54%29.97 inHg

8:00 AM

Sunny

68° 💧 None 💨 3 mph H 59%30.00 inHg

11:00 AM

Sunny

80° 💧 None 💨 4 mph H 43%30.00 inHg

2:00 PM

Mostly cloudy

87° 💧 None 💨 5 mph H 28%29.94 inHg

5:00 PM

Mostly sunny

85° 💧 None 💨 10 mph H 28%29.91 inHg

8:00 PM

Clear night

75° 💧 None 💨 8 mph H 38%29.88 inHg

11:00 PM

Clear night

69° 💧 None 💨 4 mph H 48%29.91 inHg

Friday

2:00 AM

Clear night

63° 💧 None 💨 5 mph H 68%29.91 inHg

5:00 AM

Partly cloudy night

60° 💧 None 💨 6 mph H 85%29.88 inHg

8:00 AM

Mostly cloudy

61° 💧 None 💨 5 mph H 85%29.91 inHg

11:00 AM

Partly cloudy

71° 💧 None 💨 6 mph H 60%29.91 inHg

2:00 PM

Sunny

75° 💧 None 💨 8 mph H 52%29.88 inHg

5:00 PM

Sunny

70° 💧 None 💨 9 mph H 52%29.85 inHg

11:00 PM

Partly cloudy night

59° 💧 None 💨 6 mph H 76%29.85 inHg

Saturday

5:00 AM

Partly cloudy night

56° 💧 None 💨 5 mph H 84%29.85 inHg

11:00 AM

Sunny

68° 💧 None 💨 4 mph H 55%29.91 inHg

5:00 PM

Sunny

74° 💧 None 💨 5 mph H 42%29.83 inHg

11:00 PM

Clear night

60° 💧 None 💨 3 mph H 77%29.88 inHg

Sunday

5:00 AM

Mostly clear night

54° 💧 None 💨 3 mph H 94%29.85 inHg

11:00 AM

Mostly sunny

71° 💧 None 💨 3 mph H 54%29.88 inHg

5:00 PM

Partly cloudy

75° 💧 None 💨 7 mph H 38%29.83 inHg

11:00 PM

Clear night

59° 💧 None 💨 4 mph H 73%29.85 inHg

Monday

5:00 AM

Clear night

55° 💧 None 💨 2 mph H 92%29.85 inHg

11:00 AM

Sunny

71° 💧 None 💨 2 mph H 56%29.91 inHg

5:00 PM

Sunny

79° 💧 None 💨 4 mph H 36%29.85 inHg

11:00 PM

Clear night

60° 💧 None 💨 3 mph H 75%29.88 inHg

Tuesday

5:00 AM

Mostly cloudy night

55° 💧 None 💨 2 mph H 95%29.91 inHg

11:00 AM

Mostly sunny

68° 💧 None 💨 4 mph H 63%29.94 inHg

5:00 PM

Sunny

75° 💧 None 💨 3 mph H 49%29.91 inHg

11:00 PM

Mostly clear night

59° 💧 None 💨 3 mph H 82%29.94 inHg

Wednesday

5:00 AM

Partly cloudy night

56° 💧 None 💨 4 mph H 93%29.97 inHg

11:00 AM

Sunny

65° 💧 None 💨 4 mph H 68%30.00 inHg

5:00 PM

Sunny

71° 💧 None 💨 6 mph H 56%29.94 inHg

11:00 PM

Clear night

57° 💧 None 💨 4 mph H 91%29.97 inHg

Thursday

5:00 AM

Mostly cloudy night

56° 💧 None 💨 4 mph H 95%29.97 inHg

11:00 AM

Sunny

66° 💧 None 💨 4 mph H 70%30.00 inHg

5:00 PM

Sunny

71° 💧 None 💨 5 mph H 59%29.91 inHg

11:00 PM

Mostly clear night

58° 💧 None 💨 4 mph H 88%29.91 inHg

Friday

5:00 AM

Partly cloudy night

57° 💧 None 💨 4 mph H 92%29.88 inHg

11:00 AM

Mostly sunny

64° 💧 None 💨 4 mph H 71%29.88 inHg

5:00 PM

Sunny

67° 💧 None 💨 7 mph H 67%29.83 inHg

11:00 PM

Mostly cloudy night

58° 💧 None 💨 4 mph H 91%29.85 inHg

Saturday

5:00 AM

Overcast night

58° 💧 None 💨 4 mph H 92%29.85 inHg

11:00 AM

Partly cloudy

64° 💧 None 💨 4 mph H 72%29.91 inHg

5:00 PM

Mostly sunny

66° 💧 None 💨 7 mph H 68%29.88 inHg

11:00 PM

Partly cloudy night

59° 💧 None 💨 4 mph H 89%29.94 inHg

Sunday

5:00 AM

Overcast night

58° 💧 None 💨 4 mph H 92%29.94 inHg

11:00 AM

Mostly sunny

66° 💧 None 💨 3 mph H 65%30.00 inHg

5:00 PM

Sunny

69° 💧 None 💨 7 mph H 61%29.94 inHg

In Alto and, more broadly, across the state of California: Clear skies will continue through the evening, with temperatures remaining mild to warm, ranging from 77 to 84 degrees Fahrenheit. Winds will be coming from the north at around 10 to 14 mph, with gusts reaching up to 29 mph. No precipitation is expected overnight, so conditions will be dry. It will be a pleasant evening with comfortable temperatures and moderate breezes.

15-Day Weather Outlook for Alto

TomorrowTomorrow

Partly cloudy 76°/53° 💧 None 💨 11 mph

Tuesday, Sep 8Tue Sep 8

Partly cloudy 82°/56° 💧 None 💨 9 mph

Wednesday, Sep 9Wed Sep 9

Overcast 88°/63° 💧 None 💨 6 mph

Thursday, Sep 10Thu Sep 10

Sunny 89°/66° 💧 None 💨 6 mph

Friday, Sep 11Fri Sep 11

Mostly sunny 85°/61° 💧 None 💨 7 mph

Saturday, Sep 12Sat Sep 12

Sunny 76°/57° 💧 None 💨 6 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 71°/57° 💧 None 💨 5 mph

Monday, Sep 14Mon Sep 14

Mostly cloudy 66°/57° 💧 0.001 in 💨 9 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 67°/55° 💧 None 💨 9 mph

Wednesday, Sep 16Wed Sep 16

Partly cloudy 71°/55° 💧 None 💨 6 mph

Thursday, Sep 17Thu Sep 17

Sunny 76°/56° 💧 None 💨 6 mph

Friday, Sep 18Fri Sep 18

Mostly sunny 76°/55° 💧 None 💨 6 mph

Saturday, Sep 19Sat Sep 19

Sunny 76°/55° 💧 None 💨 4 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 69°/54° 💧 None 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Alto

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Alto

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 2:00 AM

PM2.5 Fine particles Good 2,5µg/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 8,6µg/m³

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

O₃ Ozone Fair 79,3µg/m³

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

NO₂ Nitrogen dioxide Good 0,7µg/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 Alto

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 7,1High 🙂Fair

Tomorrow UV 7,3High 🙂Fair

Tuesday UV 7,5High 🙂Fair

Wednesday UV 8,3Very high 🙂Fair

Thursday UV 6,0High 🙂Fair

Friday UV 5,0Moderate —Unavailable

Saturday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,4 9:00 AMUV 1,3 10:00 AMUV 2,8 11:00 AMUV 4,7 12:00 PMUV 6,4 1:00 PMUV 7,1 2:00 PMUV 6,8 3:00 PMUV 5,5 4:00 PMUV 3,6 5:00 PMUV 1,8 6:00 PMUV 0,6

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 Alto

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ALTO, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 2:00 AM–3:00 AM.

95/100Best-hour score

BEST TIME TONIGHT 2:00 AM–3:00 AM Astronomical darkness: 9:04 PM–5:13 AM

☁ Cloud cover 1% Real hourly forecast for the best viewing hour.

☾ Moonlight 30% Waning Crescent · Moon about 5° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 52° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min65%

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 Alto were last refreshed today at 1:05 AM. The current forecast period extends through 07/09/2026 at 11:00 PM. 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.