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Current weather in Greenhorn is overcast clouds.

Where can I find the hourly weather forecast for Greenhorn?

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

Is the weather forecast for Greenhorn updated regularly?

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

Now · 11:31 AM

Greenhorn Weather & Hourly Forecast

United States · California · 95971

74°F

Overcast

Feels like: 67°F

💧 Humidity 18% 🌡 Pressure 29.94 inHg 💨 Wind 6 mph 👁 Visibility 27.8 mi ☁ Clouds 97% ☀️ UV index 3.8 · Moderate 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Greenhorn

Today

12:00 PM

Overcast

74° 💧 None 💨 6 mph H 18%29.94 inHg

3:00 PM

Overcast

78° 💧 None 💨 2 mph H 16%29.88 inHg

6:00 PM

Overcast

71° 💧 None 💨 4 mph H 29%29.91 inHg

9:00 PM

Mostly cloudy night

57° 💧 None 💨 3 mph H 59%29.97 inHg

Tomorrow

12:00 AM

Mostly cloudy night

57° 💧 None 💨 1 mph H 52%29.97 inHg

3:00 AM

Mostly cloudy night

54° 💧 None 💨 1 mph H 50%29.94 inHg

6:00 AM

Overcast night

51° 💧 None 💨 2 mph H 56%29.94 inHg

9:00 AM

Sunny

66° 💧 None 💨 1 mph H 31%29.94 inHg

12:00 PM

Mostly sunny

77° 💧 0.004 in 💨 3 mph H 16%29.88 inHg

3:00 PM

Mostly cloudy

79° 💧 0.014 in 💨 3 mph H 14%29.83 inHg

6:00 PM

Mostly sunny

69° 💧 0.000 in 💨 5 mph H 36%29.88 inHg

9:00 PM

Clear night

54° 💧 None 💨 2 mph H 77%29.94 inHg

Tuesday

12:00 AM

Clear night

51° 💧 None 💨 1 mph H 80%29.97 inHg

3:00 AM

Clear night

51° 💧 None 💨 1 mph H 75%29.94 inHg

6:00 AM

Clear night

51° 💧 None 💨 1 mph H 73%29.97 inHg

9:00 AM

Sunny

63° 💧 None 💨 0 mph H 47%29.97 inHg

Today

12:00 PM

Overcast

74° 💧 None 💨 6 mph H 18%29.94 inHg

1:00 PM

Overcast

76° 💧 None 💨 4 mph H 17%29.91 inHg

2:00 PM

Overcast

77° 💧 None 💨 3 mph H 16%29.91 inHg

3:00 PM

Overcast

78° 💧 None 💨 2 mph H 16%29.88 inHg

4:00 PM

Overcast

78° 💧 None 💨 3 mph H 16%29.85 inHg

5:00 PM

Overcast

76° 💧 None 💨 6 mph H 18%29.85 inHg

6:00 PM

Overcast

71° 💧 None 💨 4 mph H 29%29.91 inHg

7:00 PM

Mostly cloudy

64° 💧 None 💨 2 mph H 40%29.94 inHg

8:00 PM

Mostly cloudy night

60° 💧 None 💨 2 mph H 51%29.97 inHg

9:00 PM

Mostly cloudy night

57° 💧 None 💨 3 mph H 59%29.97 inHg

10:00 PM

Partly cloudy night

56° 💧 None 💨 2 mph H 61%29.97 inHg

11:00 PM

Overcast night

55° 💧 None 💨 2 mph H 60%29.97 inHg

Tomorrow

12:00 AM

Mostly cloudy night

57° 💧 None 💨 1 mph H 52%29.97 inHg

1:00 AM

Mostly cloudy night

56° 💧 None 💨 1 mph H 49%29.97 inHg

2:00 AM

Mostly cloudy night

56° 💧 None 💨 1 mph H 48%29.97 inHg

3:00 AM

Mostly cloudy night

54° 💧 None 💨 1 mph H 50%29.94 inHg

4:00 AM

Mostly cloudy night

54° 💧 None 💨 1 mph H 51%29.94 inHg

5:00 AM

Mostly cloudy night

52° 💧 None 💨 1 mph H 54%29.94 inHg

6:00 AM

Overcast night

51° 💧 None 💨 2 mph H 56%29.94 inHg

7:00 AM

Overcast

52° 💧 None 💨 2 mph H 57%29.94 inHg

8:00 AM

Partly cloudy

55° 💧 None 💨 2 mph H 52%29.94 inHg

9:00 AM

Sunny

66° 💧 None 💨 1 mph H 31%29.94 inHg

10:00 AM

Sunny

71° 💧 None 💨 2 mph H 24%29.91 inHg

11:00 AM

Mostly sunny

75° 💧 None 💨 3 mph H 20%29.91 inHg

12:00 PM

Mostly sunny

77° 💧 0.000 in 💨 3 mph H 16%29.88 inHg

1:00 PM

Mostly sunny

79° 💧 0.003 in 💨 3 mph H 14%29.85 inHg

2:00 PM

Partly cloudy

80° 💧 0.000 in 💨 4 mph H 14%29.83 inHg

3:00 PM

Mostly cloudy

79° 💧 0.000 in 💨 3 mph H 14%29.83 inHg

4:00 PM

Light thunderstorms

74° 💧 0.010 in 💨 4 mph H 23%29.85 inHg

5:00 PM

Light rain

70° 💧 0.004 in 💨 7 mph H 38%29.85 inHg

6:00 PM

Mostly sunny

69° 💧 0.000 in 💨 5 mph H 36%29.88 inHg

7:00 PM

Sunny

62° 💧 None 💨 2 mph H 52%29.88 inHg

8:00 PM

Clear night

57° 💧 None 💨 3 mph H 66%29.94 inHg

9:00 PM

Clear night

54° 💧 None 💨 2 mph H 77%29.94 inHg

10:00 PM

Clear night

52° 💧 None 💨 2 mph H 84%29.97 inHg

11:00 PM

Clear night

51° 💧 None 💨 2 mph H 86%29.97 inHg

Tuesday

12:00 AM

Clear night

51° 💧 None 💨 1 mph H 80%29.97 inHg

1:00 AM

Clear night

52° 💧 None 💨 0 mph H 75%29.97 inHg

2:00 AM

Clear night

52° 💧 None 💨 0 mph H 74%29.97 inHg

3:00 AM

Clear night

51° 💧 None 💨 1 mph H 75%29.94 inHg

4:00 AM

Clear night

51° 💧 None 💨 0 mph H 75%29.94 inHg

5:00 AM

Mostly clear night

51° 💧 None 💨 0 mph H 73%29.97 inHg

6:00 AM

Clear night

51° 💧 None 💨 1 mph H 73%29.97 inHg

7:00 AM

Sunny

49° 💧 None 💨 1 mph H 76%29.97 inHg

8:00 AM

Sunny

54° 💧 None 💨 2 mph H 66%29.97 inHg

9:00 AM

Sunny

63° 💧 None 💨 0 mph H 47%29.97 inHg

10:00 AM

Sunny

68° 💧 None 💨 2 mph H 37%29.97 inHg

11:00 AM

Sunny

72° 💧 None 💨 4 mph H 30%29.94 inHg

12:00 PM

Sunny

75° 💧 None 💨 5 mph H 20%29.91 inHg

1:00 PM

Sunny

77° 💧 None 💨 5 mph H 18%29.91 inHg

2:00 PM

Sunny

78° 💧 None 💨 6 mph H 17%29.88 inHg

3:00 PM

Sunny

78° 💧 0.000 in 💨 8 mph H 18%29.85 inHg

4:00 PM

Sunny

76° 💧 None 💨 8 mph H 18%29.85 inHg

5:00 PM

Sunny

74° 💧 None 💨 8 mph H 20%29.88 inHg

6:00 PM

Sunny

71° 💧 None 💨 7 mph H 24%29.88 inHg

7:00 PM

Sunny

63° 💧 None 💨 2 mph H 36%29.91 inHg

8:00 PM

Clear night

58° 💧 None 💨 2 mph H 46%29.94 inHg

9:00 PM

Clear night

54° 💧 None 💨 2 mph H 56%29.97 inHg

10:00 PM

Clear night

52° 💧 None 💨 2 mph H 63%29.97 inHg

11:00 PM

Clear night

50° 💧 None 💨 2 mph H 65%29.97 inHg

Wednesday

12:00 AM

Clear night

50° 💧 None 💨 1 mph H 62%29.97 inHg

1:00 AM

Clear night

51° 💧 None 💨 1 mph H 56%29.97 inHg

2:00 AM

Clear night

51° 💧 None 💨 1 mph H 53%29.97 inHg

3:00 AM

Clear night

50° 💧 None 💨 1 mph H 53%30.00 inHg

4:00 AM

Clear night

49° 💧 None 💨 1 mph H 54%30.00 inHg

5:00 AM

Clear night

48° 💧 None 💨 1 mph H 55%30.00 inHg

8:00 AM

Sunny

51° 💧 None 💨 3 mph H 57%30.03 inHg

11:00 AM

Mostly cloudy

74° 💧 None 💨 2 mph H 20%30.00 inHg

2:00 PM

Partly cloudy

80° 💧 None 💨 5 mph H 13%29.91 inHg

5:00 PM

Sunny

78° 💧 None 💨 6 mph H 13%29.88 inHg

8:00 PM

Clear night

64° 💧 None 💨 1 mph H 25%29.94 inHg

11:00 PM

Clear night

55° 💧 None 💨 2 mph H 35%29.97 inHg

Thursday

2:00 AM

Clear night

52° 💧 None 💨 1 mph H 40%29.97 inHg

5:00 AM

Clear night

50° 💧 None 💨 1 mph H 44%29.97 inHg

8:00 AM

Sunny

52° 💧 None 💨 3 mph H 46%29.97 inHg

11:00 AM

Sunny

75° 💧 None 💨 5 mph H 16%29.94 inHg

2:00 PM

Sunny

79° 💧 None 💨 10 mph H 12%29.88 inHg

5:00 PM

Sunny

75° 💧 None 💨 9 mph H 16%29.88 inHg

8:00 PM

Partly cloudy night

61° 💧 None 💨 2 mph H 32%29.91 inHg

11:00 PM

Mostly cloudy night

55° 💧 None 💨 2 mph H 43%29.91 inHg

Friday

2:00 AM

Partly cloudy night

52° 💧 None 💨 2 mph H 46%29.91 inHg

5:00 AM

Clear night

50° 💧 None 💨 3 mph H 44%29.91 inHg

8:00 AM

Sunny

54° 💧 None 💨 2 mph H 43%29.94 inHg

11:00 AM

Sunny

71° 💧 None 💨 10 mph H 20%29.91 inHg

2:00 PM

Mostly sunny

75° 💧 None 💨 10 mph H 17%29.88 inHg

5:00 PM

Sunny

71° 💧 None 💨 9 mph H 20%29.88 inHg

8:00 PM

Clear night

59° 💧 None 💨 1 mph H 37%29.94 inHg

11:00 PM

Clear night

51° 💧 None 💨 2 mph H 51%29.97 inHg

Saturday

5:00 AM

Clear night

52° 💧 None 💨 2 mph H 65%29.91 inHg

11:00 AM

Sunny

43° 💧 None 💨 4 mph H 88%29.85 inHg

5:00 PM

Sunny

70° 💧 None 💨 9 mph H 25%29.80 inHg

11:00 PM

Clear night

69° 💧 None 💨 10 mph H 22%29.77 inHg

Sunday

5:00 AM

Clear night

50° 💧 None 💨 2 mph H 53%29.83 inHg

11:00 AM

Partly cloudy

44° 💧 None 💨 3 mph H 72%29.77 inHg

5:00 PM

Mostly sunny

64° 💧 None 💨 8 mph H 13%29.77 inHg

11:00 PM

Clear night

63° 💧 None 💨 6 mph H 16%29.77 inHg

Monday

5:00 AM

Clear night

48° 💧 None 💨 1 mph H 37%29.85 inHg

11:00 AM

Sunny

40° 💧 None 💨 2 mph H 67%29.91 inHg

5:00 PM

Sunny

64° 💧 None 💨 4 mph H 27%29.91 inHg

11:00 PM

Clear night

70° 💧 None 💨 6 mph H 15%29.80 inHg

Tuesday

5:00 AM

Clear night

47° 💧 None 💨 4 mph H 40%29.85 inHg

11:00 AM

Sunny

42° 💧 None 💨 4 mph H 50%29.85 inHg

5:00 PM

Sunny

70° 💧 None 💨 1 mph H 17%29.83 inHg

11:00 PM

Clear night

75° 💧 None 💨 7 mph H 14%29.74 inHg

Wednesday

5:00 AM

Clear night

53° 💧 None 💨 1 mph H 39%29.85 inHg

11:00 AM

Sunny

46° 💧 None 💨 1 mph H 51%29.88 inHg

5:00 PM

Sunny

71° 💧 None 💨 3 mph H 18%29.88 inHg

11:00 PM

Clear night

73° 💧 None 💨 8 mph H 15%29.83 inHg

Thursday

5:00 AM

Partly cloudy night

53° 💧 None 💨 1 mph H 36%29.88 inHg

11:00 AM

Partly cloudy

49° 💧 None 💨 1 mph H 44%29.88 inHg

5:00 PM

Partly cloudy

70° 💧 None 💨 7 mph H 16%29.85 inHg

11:00 PM

Mostly cloudy night

67° 💧 None 💨 9 mph H 21%29.83 inHg

Friday

5:00 AM

Clear night

48° 💧 None 💨 2 mph H 58%29.88 inHg

11:00 AM

Sunny

43° 💧 None 💨 1 mph H 73%29.91 inHg

5:00 PM

Sunny

60° 💧 None 💨 2 mph H 41%29.97 inHg

11:00 PM

Clear night

67° 💧 None 💨 5 mph H 26%29.88 inHg

Saturday

5:00 AM

Clear night

47° 💧 None 💨 4 mph H 31%30.06 inHg

11:00 AM

Sunny

40° 💧 None 💨 4 mph H 40%30.09 inHg

5:00 PM

Sunny

64° 💧 None 💨 6 mph H 18%30.09 inHg

11:00 PM

Clear night

71° 💧 None 💨 5 mph H 15%29.94 inHg

Sunday

5:00 AM

Clear night

47° 💧 None 💨 4 mph H 34%29.97 inHg

11:00 AM

Sunny

44° 💧 None 💨 1 mph H 45%29.91 inHg

5:00 PM

Sunny

69° 💧 None 💨 7 mph H 17%29.88 inHg

11:00 PM

Clear night

68° 💧 None 💨 11 mph H 19%29.80 inHg

In Greenhorn and, more broadly, across the state of California: The rest of the day will be characterized by mostly cloudy skies, with temperatures remaining mild to warm, ranging from 69 to 81 degrees Fahrenheit. Light northwest winds are expected to continue, with maximum sustained speeds around 9 mph and gusts reaching up to 17 mph. No precipitation is forecasted, so outdoor plans should generally be unaffected by weather conditions. The atmosphere will stay relatively stable, providing comfortable weather through the afternoon hours. Overall, it will be a mild day with little change expected as the day progresses.

15-Day Weather Outlook for Greenhorn

TomorrowTomorrow

Light thunderstorms 80°/51° 💧 None 💨 7 mph

Tuesday, Sep 22Tue Sep 22

Mostly sunny 78°/49° 💧 None 💨 8 mph

Wednesday, Sep 23Wed Sep 23

Mostly cloudy 80°/48° 💧 None 💨 6 mph

Thursday, Sep 24Thu Sep 24

Partly cloudy 79°/50° 💧 None 💨 10 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 75°/50° 💧 None 💨 10 mph

Saturday, Sep 26Sat Sep 26

Sunny 70°/43° 💧 None 💨 10 mph

Sunday, Sep 27Sun Sep 27

Partly cloudy 64°/44° 💧 None 💨 8 mph

Monday, Sep 28Mon Sep 28

Sunny 70°/40° 💧 None 💨 6 mph

Tuesday, Sep 29Tue Sep 29

Sunny 75°/42° 💧 None 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Sunny 73°/46° 💧 None 💨 8 mph

Thursday, Oct 1Thu Oct 1

Partly cloudy 70°/49° 💧 None 💨 9 mph

Friday, Oct 2Fri Oct 2

Sunny 67°/43° 💧 None 💨 5 mph

Saturday, Oct 3Sat Oct 3

Sunny 71°/40° 💧 None 💨 6 mph

Sunday, Oct 4Sun Oct 4

Sunny 69°/44° 💧 None 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Greenhorn

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Greenhorn

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 12:00 PM

PM2.5 Fine particles Good 6,3µg/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 13,5µg/m³

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

O₃ Ozone Fair 79,4µg/m³

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

NO₂ Nitrogen dioxide Good 4,5µg/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 Greenhorn

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 5,7Moderate 🙂Fair

Tomorrow UV 6,4High 😐Moderate

Tuesday UV 6,8High 😐Moderate

Wednesday UV 5,6Moderate 😷Poor

Thursday UV 6,0High 🙂Fair

Friday UV 6,0High —Unavailable

Saturday UV 7,0High —Unavailable

Hourly UV index today

12:00 PMUV 5,1 1:00 PMUV 5,7 2:00 PMUV 5,3 3:00 PMUV 4,3 4:00 PMUV 2,6 5:00 PMUV 1,1 6:00 PMUV 0,3 7:00 PMUV 0,0

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

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. 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 Greenhorn

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · GREENHORN, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Fair observing conditions. Best local viewing window: 10:00 PM–11:00 PM.

57/100Best-hour score

BEST TIME TONIGHT 10:00 PM–11:00 PM Astronomical darkness: 8:34 PM–5:19 AM

☁ Cloud cover 52% Real hourly forecast for the best viewing hour.

☾ Moonlight 70% Waxing Gibbous · Moon about 24° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 22° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min20%

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

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

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 Greenhorn were last refreshed today at 11:31 AM. The current forecast period extends through 22/09/2026 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.