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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 · 11:08 AM

Alto Weather & Hourly Forecast

United States · California · 94941

69°F

Sunny

Feels like: 70°F

💧 Humidity 61% 🌡 Pressure 30.00 inHg 💨 Wind 1 mph 👁 Visibility 19.4 mi ☁ Clouds 2% ☀️ UV index 4.9 · Moderate 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Alto

Today

12:00 PM

Sunny

73° 💧 None 💨 1 mph H 51%29.97 inHg

3:00 PM

Mostly sunny

75° 💧 None 💨 6 mph H 51%29.91 inHg

6:00 PM

Sunny

73° 💧 None 💨 7 mph H 60%29.88 inHg

9:00 PM

Clear night

66° 💧 None 💨 4 mph H 58%29.91 inHg

Tomorrow

12:00 AM

Clear night

62° 💧 None 💨 4 mph H 69%29.91 inHg

3:00 AM

Clear night

58° 💧 None 💨 2 mph H 84%29.91 inHg

6:00 AM

Clear night

57° 💧 None 💨 4 mph H 97%29.94 inHg

9:00 AM

Sunny

62° 💧 None 💨 3 mph H 85%30.00 inHg

12:00 PM

Sunny

73° 💧 None 💨 2 mph H 56%30.00 inHg

3:00 PM

Mostly sunny

76° 💧 0.000 in 💨 7 mph H 56%29.94 inHg

6:00 PM

Sunny

74° 💧 None 💨 6 mph H 57%29.94 inHg

9:00 PM

Overcast night

69° 💧 None 💨 1 mph H 67%29.97 inHg

Wednesday

12:00 AM

Overcast night

64° 💧 None 💨 2 mph H 75%30.00 inHg

3:00 AM

Overcast night

63° 💧 None 💨 4 mph H 78%30.00 inHg

6:00 AM

Overcast night

62° 💧 None 💨 2 mph H 81%30.00 inHg

9:00 AM

Overcast

64° 💧 None 💨 3 mph H 74%30.03 inHg

Today

12:00 PM

Sunny

73° 💧 None 💨 1 mph H 51%29.97 inHg

1:00 PM

Sunny

75° 💧 None 💨 2 mph H 46%29.97 inHg

2:00 PM

Mostly sunny

76° 💧 None 💨 4 mph H 44%29.94 inHg

3:00 PM

Mostly sunny

75° 💧 None 💨 6 mph H 51%29.91 inHg

4:00 PM

Mostly sunny

74° 💧 None 💨 7 mph H 59%29.91 inHg

5:00 PM

Sunny

74° 💧 None 💨 7 mph H 63%29.88 inHg

6:00 PM

Sunny

73° 💧 None 💨 7 mph H 60%29.88 inHg

7:00 PM

Sunny

71° 💧 None 💨 6 mph H 59%29.91 inHg

8:00 PM

Clear night

68° 💧 None 💨 6 mph H 57%29.91 inHg

9:00 PM

Clear night

66° 💧 None 💨 4 mph H 58%29.91 inHg

10:00 PM

Clear night

66° 💧 None 💨 1 mph H 60%29.94 inHg

11:00 PM

Clear night

64° 💧 None 💨 2 mph H 64%29.91 inHg

Tomorrow

12:00 AM

Clear night

62° 💧 None 💨 4 mph H 69%29.91 inHg

1:00 AM

Clear night

61° 💧 None 💨 4 mph H 75%29.91 inHg

2:00 AM

Clear night

59° 💧 None 💨 3 mph H 80%29.91 inHg

3:00 AM

Clear night

58° 💧 None 💨 2 mph H 84%29.91 inHg

4:00 AM

Clear night

57° 💧 None 💨 3 mph H 89%29.94 inHg

5:00 AM

Clear night

57° 💧 None 💨 4 mph H 93%29.94 inHg

6:00 AM

Clear night

57° 💧 None 💨 4 mph H 97%29.94 inHg

7:00 AM

Mostly sunny

56° 💧 None 💨 3 mph H 98%29.97 inHg

8:00 AM

Mostly sunny

59° 💧 None 💨 3 mph H 94%30.00 inHg

9:00 AM

Sunny

62° 💧 None 💨 3 mph H 85%30.00 inHg

10:00 AM

Sunny

66° 💧 None 💨 3 mph H 76%30.00 inHg

11:00 AM

Sunny

69° 💧 None 💨 3 mph H 66%30.00 inHg

12:00 PM

Sunny

73° 💧 None 💨 2 mph H 56%30.00 inHg

1:00 PM

Mostly sunny

76° 💧 None 💨 4 mph H 51%29.97 inHg

2:00 PM

Mostly sunny

77° 💧 None 💨 5 mph H 49%29.97 inHg

3:00 PM

Mostly sunny

76° 💧 None 💨 7 mph H 56%29.94 inHg

4:00 PM

Fog

75° 💧 None 💨 8 mph H 58%29.94 inHg

5:00 PM

Mostly sunny

73° 💧 0.000 in 💨 8 mph H 59%29.94 inHg

6:00 PM

Sunny

74° 💧 None 💨 6 mph H 57%29.94 inHg

7:00 PM

Sunny

73° 💧 None 💨 5 mph H 60%29.94 inHg

8:00 PM

Overcast night

70° 💧 None 💨 3 mph H 67%29.94 inHg

9:00 PM

Overcast night

69° 💧 None 💨 1 mph H 67%29.97 inHg

10:00 PM

Overcast night

67° 💧 None 💨 2 mph H 71%30.00 inHg

11:00 PM

Mostly cloudy night

65° 💧 None 💨 4 mph H 72%30.00 inHg

Wednesday

12:00 AM

Overcast night

64° 💧 None 💨 2 mph H 75%30.00 inHg

1:00 AM

Overcast night

64° 💧 None 💨 2 mph H 75%30.00 inHg

2:00 AM

Overcast night

63° 💧 None 💨 4 mph H 77%30.00 inHg

3:00 AM

Overcast night

63° 💧 None 💨 4 mph H 78%30.00 inHg

4:00 AM

Overcast night

63° 💧 None 💨 4 mph H 77%30.00 inHg

5:00 AM

Overcast night

62° 💧 None 💨 3 mph H 79%30.00 inHg

6:00 AM

Overcast night

62° 💧 None 💨 2 mph H 81%30.00 inHg

7:00 AM

Overcast

62° 💧 None 💨 2 mph H 81%30.03 inHg

8:00 AM

Overcast

63° 💧 None 💨 1 mph H 79%30.03 inHg

9:00 AM

Overcast

64° 💧 None 💨 3 mph H 74%30.03 inHg

10:00 AM

Overcast

69° 💧 None 💨 1 mph H 63%30.06 inHg

11:00 AM

Mostly cloudy

76° 💧 None 💨 0 mph H 50%30.06 inHg

12:00 PM

Mostly cloudy

81° 💧 None 💨 1 mph H 39%30.03 inHg

1:00 PM

Partly cloudy

82° 💧 None 💨 4 mph H 40%30.03 inHg

2:00 PM

Mostly cloudy

83° 💧 None 💨 5 mph H 42%30.00 inHg

3:00 PM

Overcast

85° 💧 None 💨 5 mph H 40%29.97 inHg

4:00 PM

Overcast

86° 💧 None 💨 5 mph H 39%29.97 inHg

5:00 PM

Overcast

86° 💧 None 💨 6 mph H 35%29.94 inHg

Thursday

2:00 AM

Clear night

68° 💧 None 💨 3 mph H 53%29.97 inHg

5:00 AM

Overcast night

65° 💧 None 💨 3 mph H 66%29.94 inHg

8:00 AM

Mostly cloudy

66° 💧 None 💨 4 mph H 68%29.97 inHg

11:00 AM

Mostly sunny

77° 💧 None 💨 6 mph H 51%29.97 inHg

2:00 PM

Mostly cloudy

82° 💧 None 💨 6 mph H 41%29.94 inHg

5:00 PM

Sunny

79° 💧 None 💨 5 mph H 40%29.91 inHg

8:00 PM

Partly cloudy night

66° 💧 None 💨 5 mph H 64%29.91 inHg

11:00 PM

Mostly clear night

62° 💧 None 💨 5 mph H 79%29.91 inHg

Friday

2:00 AM

Mostly clear night

60° 💧 None 💨 5 mph H 88%29.91 inHg

5:00 AM

Mostly clear night

59° 💧 None 💨 5 mph H 95%29.88 inHg

8:00 AM

Mostly sunny

60° 💧 None 💨 5 mph H 89%29.91 inHg

11:00 AM

Sunny

68° 💧 None 💨 6 mph H 67%29.91 inHg

2:00 PM

Sunny

73° 💧 None 💨 7 mph H 57%29.88 inHg

5:00 PM

Mostly sunny

70° 💧 None 💨 7 mph H 57%29.85 inHg

8:00 PM

Partly cloudy night

62° 💧 None 💨 6 mph H 75%29.85 inHg

11:00 PM

Mostly clear night

60° 💧 None 💨 5 mph H 79%29.88 inHg

Saturday

2:00 AM

Mostly clear night

58° 💧 None 💨 5 mph H 84%29.88 inHg

5:00 AM

Mostly clear night

57° 💧 None 💨 5 mph H 89%29.88 inHg

8:00 AM

Sunny

59° 💧 None 💨 4 mph H 78%29.94 inHg

11:00 AM

Partly cloudy

69° 💧 None 💨 5 mph H 54%29.94 inHg

2:00 PM

Partly cloudy

73° 💧 None 💨 9 mph H 40%29.94 inHg

5:00 PM

Mostly cloudy

69° 💧 None 💨 10 mph H 52%29.91 inHg

8:00 PM

Overcast night

61° 💧 None 💨 6 mph H 75%29.91 inHg

11:00 PM

Mostly clear night

59° 💧 None 💨 4 mph H 76%29.94 inHg

Sunday

5:00 AM

Partly cloudy night

58° 💧 None 💨 5 mph H 78%29.94 inHg

11:00 AM

Mostly sunny

54° 💧 None 💨 2 mph H 89%29.94 inHg

5:00 PM

Mostly sunny

68° 💧 None 💨 2 mph H 55%29.97 inHg

11:00 PM

Clear night

78° 💧 None 💨 6 mph H 33%29.88 inHg

Monday

5:00 AM

Clear night

60° 💧 None 💨 3 mph H 70%29.88 inHg

11:00 AM

Sunny

54° 💧 None 💨 2 mph H 94%29.85 inHg

5:00 PM

Sunny

69° 💧 None 💨 4 mph H 59%29.91 inHg

11:00 PM

Clear night

74° 💧 None 💨 7 mph H 48%29.83 inHg

Tuesday

5:00 AM

Clear night

57° 💧 None 💨 5 mph H 84%29.88 inHg

11:00 AM

Mostly sunny

54° 💧 None 💨 3 mph H 95%29.88 inHg

5:00 PM

Sunny

67° 💧 None 💨 2 mph H 61%29.94 inHg

11:00 PM

Clear night

68° 💧 None 💨 8 mph H 59%29.91 inHg

Wednesday

5:00 AM

Partly cloudy night

58° 💧 None 💨 5 mph H 92%29.97 inHg

11:00 AM

Mostly cloudy

57° 💧 None 💨 7 mph H 91%30.00 inHg

5:00 PM

Partly cloudy

65° 💧 None 💨 5 mph H 68%30.03 inHg

11:00 PM

Clear night

67° 💧 None 💨 7 mph H 60%30.00 inHg

Thursday

5:00 AM

Mostly clear night

57° 💧 None 💨 4 mph H 91%30.06 inHg

11:00 AM

Mostly sunny

56° 💧 None 💨 4 mph H 94%30.06 inHg

5:00 PM

Sunny

66° 💧 None 💨 1 mph H 63%30.12 inHg

11:00 PM

Clear night

69° 💧 None 💨 7 mph H 52%30.03 inHg

Friday

5:00 AM

Clear night

58° 💧 None 💨 3 mph H 84%30.06 inHg

11:00 AM

Sunny

55° 💧 None 💨 2 mph H 90%30.06 inHg

5:00 PM

Sunny

68° 💧 None 💨 3 mph H 60%30.09 inHg

11:00 PM

Clear night

75° 💧 None 💨 3 mph H 42%29.97 inHg

Saturday

5:00 AM

Clear night

58° 💧 None 💨 3 mph H 82%29.97 inHg

11:00 AM

Sunny

55° 💧 None 💨 2 mph H 95%29.94 inHg

5:00 PM

Sunny

68° 💧 None 💨 3 mph H 62%29.97 inHg

11:00 PM

Clear night

74° 💧 None 💨 5 mph H 52%29.88 inHg

Sunday

5:00 AM

Mostly clear night

58° 💧 None 💨 3 mph H 85%29.91 inHg

11:00 AM

Overcast

57° 💧 None 💨 5 mph H 91%29.91 inHg

5:00 PM

Mostly sunny

64° 💧 None 💨 4 mph H 71%29.97 inHg

11:00 PM

Clear night

67° 💧 None 💨 7 mph H 65%29.91 inHg

Monday

5:00 AM

Overcast night

58° 💧 None 💨 4 mph H 92%29.97 inHg

11:00 AM

Mostly cloudy

58° 💧 None 💨 4 mph H 91%30.00 inHg

5:00 PM

Mostly sunny

65° 💧 None 💨 2 mph H 69%30.06 inHg

11:00 PM

Mostly clear night

69° 💧 None 💨 7 mph H 58%30.00 inHg

In Alto and, more broadly, across the state of California: The rest of the day will feature clear skies and mild to warm temperatures, ranging from 73 to 85 degrees Fahrenheit. Light northwest winds will blow at around 8 mph, with occasional gusts reaching 10 mph. No precipitation is anticipated, so expect dry conditions through the afternoon. The weather should remain tranquil, making it a pleasant day for outdoor activities. Temperatures are expected to stay steady as the day progresses, with no significant changes in wind or weather patterns. Overall, it will be a calm and comfortable afternoon with clear skies and mild breezes.

15-Day Weather Outlook for Alto

TomorrowTomorrow

Mostly sunny 77°/56° 💧 None 💨 8 mph

Wednesday, Sep 9Wed Sep 9

Mostly sunny 86°/62° 💧 None 💨 8 mph

Thursday, Sep 10Thu Sep 10

Overcast 86°/65° 💧 None 💨 6 mph

Friday, Sep 11Fri Sep 11

Partly cloudy 79°/59° 💧 None 💨 7 mph

Saturday, Sep 12Sat Sep 12

Mostly sunny 73°/57° 💧 None 💨 9 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 69°/54° 💧 None 💨 10 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 78°/54° 💧 None 💨 6 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 74°/54° 💧 None 💨 7 mph

Wednesday, Sep 16Wed Sep 16

Mostly cloudy 68°/57° 💧 None 💨 8 mph

Thursday, Sep 17Thu Sep 17

Partly cloudy 67°/56° 💧 None 💨 7 mph

Friday, Sep 18Fri Sep 18

Sunny 69°/55° 💧 None 💨 7 mph

Saturday, Sep 19Sat Sep 19

Sunny 75°/55° 💧 None 💨 3 mph

Sunday, Sep 20Sun Sep 20

Mostly sunny 74°/57° 💧 None 💨 5 mph

Monday, Sep 21Mon Sep 21

Mostly cloudy 67°/58° 💧 0.001 in 💨 7 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 69°/65° 💧 0.001 in 💨 7 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 12:00 PM

PM2.5 Fine particles Good 4,8µg/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 13,7µg/m³

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

O₃ Ozone Fair 82,5µg/m³

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

NO₂ Nitrogen dioxide Good 0,6µg/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 7,3High 🙂Fair

Tomorrow UV 7,7High 🙂Fair

Wednesday UV 7,9High 🙂Fair

Thursday UV 8,4Very high 🙂Fair

Friday UV 5,0Moderate 🙂Fair

Saturday UV 5,0Moderate —Unavailable

Sunday UV 5,0Moderate —Unavailable

Hourly UV index today

12:00 PMUV 6,5 1:00 PMUV 7,3 2:00 PMUV 6,9 3:00 PMUV 5,5 4:00 PMUV 3,6 5:00 PMUV 1,8 6:00 PMUV 0,6 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 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: 3:00 AM–4:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 3:00 AM–4:00 AM Astronomical darkness: 9:00 PM–5:16 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 13% Waning Crescent · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 64° high at the best hour.

✦ Estimated visible meteors 2–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min78%

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 11:08 AM. The current forecast period extends through 09/09/2026 at 9:00 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.