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Current weather in Alta Sierra is clear sky.

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

Now · 11:25 AM

Alta Sierra Weather & Hourly Forecast

United States · California · 95949

82°F

Sunny

Feels like: 78°F

💧 Humidity 23% 🌡 Pressure 29.94 inHg 💨 Wind 4 mph 👁 Visibility 23.4 mi ☁ Clouds 0% ☀️ UV index 4.3 · Moderate 🌅 Sunrise 6:51 AM 🌇 Sunset 7:01 PM

Hourly Forecast for Alta Sierra

Today

12:00 PM

Mostly sunny

83° 💧 None 💨 5 mph H 25%29.91 inHg

3:00 PM

Sunny

86° 💧 None 💨 6 mph H 22%29.88 inHg

6:00 PM

Sunny

82° 💧 None 💨 1 mph H 28%29.88 inHg

9:00 PM

Clear night

68° 💧 None 💨 2 mph H 37%29.91 inHg

Tomorrow

12:00 AM

Clear night

60° 💧 None 💨 4 mph H 48%29.91 inHg

3:00 AM

Clear night

58° 💧 None 💨 4 mph H 47%29.91 inHg

6:00 AM

Clear night

59° 💧 None 💨 6 mph H 40%29.91 inHg

9:00 AM

Sunny

79° 💧 None 💨 5 mph H 21%29.91 inHg

12:00 PM

Mostly cloudy

88° 💧 None 💨 7 mph H 17%29.88 inHg

3:00 PM

Overcast

88° 💧 None 💨 8 mph H 18%29.88 inHg

6:00 PM

Mostly sunny

83° 💧 None 💨 5 mph H 22%29.85 inHg

9:00 PM

Mostly cloudy night

70° 💧 None 💨 6 mph H 34%29.88 inHg

Friday

12:00 AM

Partly cloudy night

66° 💧 None 💨 4 mph H 40%29.88 inHg

3:00 AM

Partly cloudy night

64° 💧 None 💨 5 mph H 42%29.91 inHg

6:00 AM

Clear night

60° 💧 None 💨 6 mph H 44%29.94 inHg

9:00 AM

Mostly sunny

71° 💧 None 💨 5 mph H 28%29.97 inHg

Today

12:00 PM

Mostly sunny

83° 💧 None 💨 5 mph H 25%29.91 inHg

1:00 PM

Mostly sunny

85° 💧 None 💨 6 mph H 25%29.91 inHg

2:00 PM

Mostly sunny

86° 💧 None 💨 6 mph H 23%29.88 inHg

3:00 PM

Sunny

86° 💧 None 💨 6 mph H 22%29.88 inHg

4:00 PM

Sunny

85° 💧 None 💨 5 mph H 21%29.88 inHg

5:00 PM

Sunny

85° 💧 None 💨 4 mph H 22%29.88 inHg

6:00 PM

Sunny

82° 💧 None 💨 1 mph H 28%29.88 inHg

7:00 PM

Sunny

75° 💧 None 💨 1 mph H 33%29.88 inHg

8:00 PM

Clear night

72° 💧 None 💨 0 mph H 34%29.88 inHg

9:00 PM

Clear night

68° 💧 None 💨 2 mph H 37%29.91 inHg

10:00 PM

Clear night

64° 💧 None 💨 4 mph H 43%29.91 inHg

11:00 PM

Clear night

61° 💧 None 💨 4 mph H 46%29.91 inHg

Tomorrow

12:00 AM

Clear night

60° 💧 None 💨 4 mph H 48%29.91 inHg

1:00 AM

Clear night

60° 💧 None 💨 4 mph H 48%29.88 inHg

2:00 AM

Clear night

59° 💧 None 💨 4 mph H 48%29.91 inHg

3:00 AM

Clear night

58° 💧 None 💨 4 mph H 47%29.91 inHg

4:00 AM

Clear night

58° 💧 None 💨 5 mph H 45%29.88 inHg

5:00 AM

Clear night

58° 💧 None 💨 6 mph H 42%29.88 inHg

6:00 AM

Clear night

59° 💧 None 💨 6 mph H 40%29.91 inHg

7:00 AM

Sunny

60° 💧 None 💨 7 mph H 38%29.91 inHg

8:00 AM

Sunny

68° 💧 None 💨 7 mph H 29%29.91 inHg

9:00 AM

Sunny

79° 💧 None 💨 5 mph H 21%29.91 inHg

10:00 AM

Sunny

85° 💧 None 💨 6 mph H 17%29.91 inHg

11:00 AM

Partly cloudy

87° 💧 None 💨 6 mph H 17%29.91 inHg

12:00 PM

Mostly cloudy

88° 💧 None 💨 7 mph H 17%29.88 inHg

1:00 PM

Partly cloudy

88° 💧 None 💨 7 mph H 18%29.88 inHg

2:00 PM

Overcast

89° 💧 None 💨 8 mph H 18%29.88 inHg

3:00 PM

Overcast

88° 💧 None 💨 8 mph H 18%29.88 inHg

4:00 PM

Mostly cloudy

87° 💧 None 💨 7 mph H 18%29.85 inHg

5:00 PM

Sunny

86° 💧 None 💨 7 mph H 19%29.85 inHg

6:00 PM

Mostly sunny

83° 💧 None 💨 5 mph H 22%29.85 inHg

7:00 PM

Clear night

75° 💧 None 💨 5 mph H 30%29.85 inHg

8:00 PM

Mostly clear night

73° 💧 None 💨 5 mph H 32%29.88 inHg

9:00 PM

Mostly cloudy night

70° 💧 None 💨 6 mph H 34%29.88 inHg

10:00 PM

Mostly cloudy night

69° 💧 None 💨 6 mph H 35%29.88 inHg

11:00 PM

Partly cloudy night

68° 💧 None 💨 4 mph H 37%29.88 inHg

Friday

12:00 AM

Partly cloudy night

66° 💧 None 💨 4 mph H 40%29.88 inHg

1:00 AM

Clear night

65° 💧 None 💨 4 mph H 42%29.91 inHg

2:00 AM

Mostly clear night

64° 💧 None 💨 6 mph H 43%29.91 inHg

3:00 AM

Partly cloudy night

64° 💧 None 💨 5 mph H 42%29.91 inHg

4:00 AM

Clear night

63° 💧 None 💨 3 mph H 41%29.91 inHg

5:00 AM

Mostly clear night

62° 💧 None 💨 4 mph H 43%29.91 inHg

6:00 AM

Clear night

60° 💧 None 💨 6 mph H 44%29.94 inHg

7:00 AM

Sunny

59° 💧 None 💨 5 mph H 44%29.94 inHg

8:00 AM

Mostly sunny

65° 💧 None 💨 5 mph H 36%29.94 inHg

9:00 AM

Mostly sunny

71° 💧 None 💨 5 mph H 28%29.97 inHg

10:00 AM

Sunny

74° 💧 None 💨 5 mph H 29%29.97 inHg

11:00 AM

Sunny

76° 💧 None 💨 6 mph H 33%29.97 inHg

12:00 PM

Mostly sunny

78° 💧 None 💨 7 mph H 34%29.97 inHg

1:00 PM

Partly cloudy

78° 💧 None 💨 8 mph H 36%29.97 inHg

2:00 PM

Partly cloudy

79° 💧 None 💨 8 mph H 36%29.94 inHg

3:00 PM

Partly cloudy

79° 💧 None 💨 7 mph H 34%29.94 inHg

4:00 PM

Partly cloudy

79° 💧 None 💨 6 mph H 30%29.91 inHg

5:00 PM

Mostly sunny

78° 💧 None 💨 6 mph H 28%29.91 inHg

6:00 PM

Sunny

76° 💧 None 💨 4 mph H 29%29.91 inHg

7:00 PM

Clear night

70° 💧 None 💨 1 mph H 36%29.91 inHg

8:00 PM

Clear night

68° 💧 None 💨 2 mph H 41%29.91 inHg

9:00 PM

Clear night

66° 💧 None 💨 2 mph H 44%29.91 inHg

10:00 PM

Clear night

64° 💧 None 💨 2 mph H 48%29.94 inHg

11:00 PM

Clear night

63° 💧 None 💨 3 mph H 52%29.91 inHg

Saturday

12:00 AM

Clear night

61° 💧 None 💨 2 mph H 57%29.91 inHg

1:00 AM

Clear night

58° 💧 None 💨 4 mph H 67%29.91 inHg

2:00 AM

Clear night

57° 💧 None 💨 5 mph H 73%29.91 inHg

3:00 AM

Clear night

57° 💧 None 💨 5 mph H 73%29.91 inHg

4:00 AM

Clear night

58° 💧 None 💨 5 mph H 70%29.88 inHg

5:00 AM

Mostly clear night

58° 💧 None 💨 5 mph H 66%29.88 inHg

8:00 AM

Mostly sunny

63° 💧 None 💨 4 mph H 47%29.91 inHg

11:00 AM

Mostly cloudy

76° 💧 None 💨 7 mph H 24%29.88 inHg

2:00 PM

Mostly cloudy

78° 💧 None 💨 9 mph H 21%29.85 inHg

5:00 PM

Mostly sunny

75° 💧 None 💨 7 mph H 22%29.85 inHg

8:00 PM

Clear night

64° 💧 None 💨 2 mph H 33%29.85 inHg

11:00 PM

Mostly clear night

57° 💧 None 💨 4 mph H 49%29.88 inHg

Sunday

2:00 AM

Overcast night

57° 💧 None 💨 3 mph H 51%29.85 inHg

5:00 AM

Overcast night

58° 💧 None 💨 3 mph H 50%29.85 inHg

8:00 AM

Overcast

62° 💧 None 💨 6 mph H 41%29.85 inHg

11:00 AM

Partly cloudy

69° 💧 None 💨 6 mph H 27%29.91 inHg

2:00 PM

Mostly sunny

74° 💧 None 💨 10 mph H 18%29.88 inHg

5:00 PM

Sunny

71° 💧 None 💨 7 mph H 21%29.85 inHg

8:00 PM

Clear night

59° 💧 None 💨 2 mph H 39%29.88 inHg

11:00 PM

Clear night

51° 💧 None 💨 3 mph H 56%29.91 inHg

Monday

2:00 AM

Clear night

49° 💧 None 💨 4 mph H 60%29.88 inHg

5:00 AM

Clear night

48° 💧 None 💨 5 mph H 51%29.88 inHg

8:00 AM

Sunny

53° 💧 None 💨 2 mph H 44%29.91 inHg

11:00 AM

Sunny

75° 💧 None 💨 3 mph H 14%29.91 inHg

2:00 PM

Sunny

76° 💧 None 💨 8 mph H 20%29.88 inHg

5:00 PM

Sunny

76° 💧 None 💨 8 mph H 24%29.85 inHg

8:00 PM

Clear night

63° 💧 None 💨 4 mph H 35%29.88 inHg

11:00 PM

Clear night

59° 💧 None 💨 6 mph H 37%29.91 inHg

Tuesday

5:00 AM

Clear night

57° 💧 None 💨 5 mph H 45%29.88 inHg

11:00 AM

Mostly sunny

55° 💧 None 💨 6 mph H 32%29.85 inHg

5:00 PM

Sunny

81° 💧 None 💨 4 mph H 15%29.91 inHg

11:00 PM

Mostly clear night

82° 💧 None 💨 6 mph H 13%29.85 inHg

Wednesday

5:00 AM

Clear night

58° 💧 None 💨 4 mph H 35%29.88 inHg

11:00 AM

Sunny

55° 💧 None 💨 4 mph H 34%29.88 inHg

5:00 PM

Sunny

85° 💧 None 💨 4 mph H 10%29.88 inHg

11:00 PM

Clear night

86° 💧 None 💨 5 mph H 9%29.83 inHg

Thursday

5:00 AM

Clear night

61° 💧 None 💨 5 mph H 28%29.88 inHg

11:00 AM

Partly cloudy

59° 💧 None 💨 6 mph H 30%29.85 inHg

5:00 PM

Sunny

86° 💧 None 💨 6 mph H 10%29.88 inHg

11:00 PM

Overcast night

84° 💧 None 💨 7 mph H 12%29.83 inHg

Friday

5:00 AM

Clear night

64° 💧 None 💨 7 mph H 27%29.85 inHg

11:00 AM

Partly cloudy

55° 💧 None 💨 3 mph H 35%29.85 inHg

5:00 PM

Sunny

86° 💧 None 💨 5 mph H 9%29.85 inHg

11:00 PM

Clear night

86° 💧 None 💨 4 mph H 10%29.80 inHg

Saturday

5:00 AM

Partly cloudy night

59° 💧 None 💨 4 mph H 31%29.85 inHg

11:00 AM

Sunny

56° 💧 None 💨 3 mph H 37%29.85 inHg

5:00 PM

Sunny

87° 💧 None 💨 3 mph H 9%29.88 inHg

11:00 PM

Clear night

88° 💧 None 💨 4 mph H 12%29.85 inHg

Sunday

5:00 AM

Clear night

61° 💧 None 💨 4 mph H 31%29.88 inHg

11:00 AM

Sunny

58° 💧 None 💨 4 mph H 29%29.91 inHg

5:00 PM

Sunny

92° 💧 None 💨 5 mph H 8%29.94 inHg

11:00 PM

Clear night

91° 💧 None 💨 6 mph H 8%29.88 inHg

Monday

5:00 AM

Clear night

64° 💧 None 💨 5 mph H 25%29.91 inHg

11:00 AM

Sunny

59° 💧 None 💨 5 mph H 33%29.88 inHg

5:00 PM

Sunny

94° 💧 None 💨 2 mph H 9%29.91 inHg

11:00 PM

Clear night

92° 💧 None 💨 5 mph H 11%29.85 inHg

Tuesday

5:00 AM

Clear night

66° 💧 None 💨 5 mph H 29%29.91 inHg

11:00 AM

Sunny

59° 💧 None 💨 3 mph H 36%29.91 inHg

5:00 PM

Sunny

88° 💧 None 💨 4 mph H 12%29.94 inHg

11:00 PM

Clear night

89° 💧 None 💨 6 mph H 11%29.88 inHg

Wednesday

5:00 AM

Clear night

66° 💧 None 💨 5 mph H 27%29.94 inHg

11:00 AM

Sunny

61° 💧 None 💨 4 mph H 31%29.94 inHg

5:00 PM

Sunny

85° 💧 None 💨 5 mph H 11%29.97 inHg

11:00 PM

Clear night

84° 💧 None 💨 8 mph H 13%29.91 inHg

In Alta Sierra and, more broadly, across the state of California: Tonight, expect mostly cloudy skies with mild to warm temperatures ranging from 73 to 80 degrees Fahrenheit. Winds will be light, coming from the west at around 9 mph, with occasional gusts reaching up to 16 mph. No precipitation is forecast for the evening and the early night hours, so outdoor plans should be comfortable. Temperatures may gradually cool into the lower 70s later in the night, but overall, conditions will remain mild. The wind remains gentle, providing a slight breeze without causing concern. Overall, it should be a pleasant evening with no weather-related disruptions.

15-Day Weather Outlook for Alta Sierra

TomorrowTomorrow

Partly cloudy 89°/58° 💧 None 💨 8 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 79°/59° 💧 None 💨 8 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 78°/57° 💧 None 💨 9 mph

Sunday, Sep 27Sun Sep 27

Overcast 74°/51° 💧 None 💨 10 mph

Monday, Sep 28Mon Sep 28

Sunny 76°/48° 💧 None 💨 8 mph

Tuesday, Sep 29Tue Sep 29

Mostly sunny 82°/55° 💧 None 💨 6 mph

Wednesday, Sep 30Wed Sep 30

Sunny 86°/55° 💧 None 💨 5 mph

Thursday, Oct 1Thu Oct 1

Partly cloudy 86°/59° 💧 None 💨 7 mph

Friday, Oct 2Fri Oct 2

Partly cloudy 86°/55° 💧 None 💨 7 mph

Saturday, Oct 3Sat Oct 3

Partly cloudy 88°/56° 💧 None 💨 4 mph

Sunday, Oct 4Sun Oct 4

Sunny 92°/58° 💧 None 💨 6 mph

Monday, Oct 5Mon Oct 5

Sunny 94°/59° 💧 None 💨 5 mph

Tuesday, Oct 6Tue Oct 6

Sunny 89°/59° 💧 None 💨 6 mph

Wednesday, Oct 7Wed Oct 7

Sunny 85°/61° 💧 None 💨 8 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Alta Sierra

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Alta Sierra

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 12:00 PM

PM2.5 Fine particles Fair 10,2µg/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 19,2µg/m³

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

O₃ Ozone Fair 99,5µg/m³

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

NO₂ Nitrogen dioxide Good 10,1µg/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 Alta Sierra

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 6,4High 🙂Fair

Tomorrow UV 6,3High ⚠️Very poor

Friday UV 6,1High 😐Moderate

Saturday UV 6,1High 😐Moderate

Sunday UV 5,0Moderate 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 7,0High —Unavailable

Hourly UV index today

12:00 PMUV 5,8 1:00 PMUV 6,4 2:00 PMUV 6,0 3:00 PMUV 4,6 4:00 PMUV 2,8 5:00 PMUV 1,2 6:00 PMUV 0,3 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.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure. Dry air can increase hydration needs.

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 Alta Sierra

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ALTA SIERRA, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:29 PM–5:24 AM

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

☾ Moonlight 95% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 64° 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 min73%

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

SEP 20–NOV 20

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

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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 Alta Sierra were last refreshed today at 11:25 AM. The current forecast period extends through 25/09/2026 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.