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

Now · 3:45 PM

Napa Weather & Hourly Forecast

United States · California · 94558

75°F

Sunny

Feels like: 72°F

💧 Humidity 49% 🌡 Pressure 29.88 inHg 💨 Wind 6 mph 👁 Visibility 22.2 mi ☁ Clouds 0% ☀️ UV index 4.7 · Moderate 🌅 Sunrise 6:55 AM 🌇 Sunset 7:07 PM

Hourly Forecast for Napa

Today

4:00 PM

Sunny

75° 💧 None 💨 6 mph H 49%29.88 inHg

7:00 PM

Sunny

68° 💧 None 💨 5 mph H 63%29.88 inHg

10:00 PM

Clear night

59° 💧 None 💨 3 mph H 89%29.91 inHg

Tomorrow

1:00 AM

Fog at night

55° 💧 None 💨 1 mph H 100%29.94 inHg

4:00 AM

Fog at night

54° 💧 0.001 in 💨 1 mph H 99%29.91 inHg

7:00 AM

Fog

55° 💧 None 💨 2 mph H 98%29.94 inHg

10:00 AM

Mostly sunny

68° 💧 None 💨 3 mph H 67%29.94 inHg

1:00 PM

Sunny

81° 💧 None 💨 5 mph H 44%29.91 inHg

4:00 PM

Sunny

87° 💧 None 💨 7 mph H 33%29.85 inHg

7:00 PM

Sunny

76° 💧 None 💨 3 mph H 44%29.83 inHg

10:00 PM

Clear night

68° 💧 None 💨 0 mph H 60%29.85 inHg

Thursday

1:00 AM

Clear night

62° 💧 None 💨 0 mph H 75%29.85 inHg

4:00 AM

Clear night

58° 💧 None 💨 0 mph H 85%29.85 inHg

7:00 AM

Partly cloudy

57° 💧 None 💨 0 mph H 83%29.85 inHg

10:00 AM

Sunny

71° 💧 None 💨 2 mph H 56%29.88 inHg

1:00 PM

Overcast

81° 💧 None 💨 5 mph H 36%29.88 inHg

Today

4:00 PM

Sunny

75° 💧 None 💨 6 mph H 49%29.88 inHg

5:00 PM

Sunny

74° 💧 None 💨 8 mph H 52%29.88 inHg

6:00 PM

Sunny

72° 💧 None 💨 7 mph H 55%29.88 inHg

7:00 PM

Sunny

68° 💧 None 💨 5 mph H 63%29.88 inHg

8:00 PM

Clear night

64° 💧 None 💨 4 mph H 73%29.91 inHg

9:00 PM

Clear night

61° 💧 None 💨 3 mph H 82%29.91 inHg

10:00 PM

Clear night

59° 💧 None 💨 3 mph H 89%29.91 inHg

11:00 PM

Clear night

57° 💧 None 💨 2 mph H 95%29.94 inHg

Tomorrow

12:00 AM

Mostly cloudy night

56° 💧 None 💨 1 mph H 99%29.94 inHg

1:00 AM

Fog at night

55° 💧 None 💨 1 mph H 100%29.94 inHg

2:00 AM

Fog at night

55° 💧 None 💨 1 mph H 99%29.91 inHg

3:00 AM

Fog at night

54° 💧 None 💨 1 mph H 99%29.91 inHg

4:00 AM

Fog at night

54° 💧 0.001 in 💨 1 mph H 99%29.91 inHg

5:00 AM

Fog at night

54° 💧 None 💨 1 mph H 98%29.91 inHg

6:00 AM

Fog at night

55° 💧 None 💨 1 mph H 97%29.91 inHg

7:00 AM

Fog

55° 💧 None 💨 2 mph H 98%29.94 inHg

8:00 AM

Mostly cloudy

57° 💧 None 💨 2 mph H 92%29.94 inHg

9:00 AM

Partly cloudy

62° 💧 None 💨 2 mph H 81%29.94 inHg

10:00 AM

Mostly sunny

68° 💧 None 💨 3 mph H 67%29.94 inHg

11:00 AM

Sunny

73° 💧 None 💨 3 mph H 56%29.94 inHg

12:00 PM

Sunny

77° 💧 None 💨 4 mph H 49%29.94 inHg

1:00 PM

Sunny

81° 💧 None 💨 5 mph H 44%29.91 inHg

2:00 PM

Sunny

84° 💧 None 💨 5 mph H 39%29.88 inHg

3:00 PM

Sunny

86° 💧 None 💨 6 mph H 35%29.85 inHg

4:00 PM

Sunny

87° 💧 None 💨 7 mph H 33%29.85 inHg

5:00 PM

Sunny

86° 💧 None 💨 7 mph H 33%29.85 inHg

6:00 PM

Sunny

83° 💧 None 💨 6 mph H 36%29.83 inHg

7:00 PM

Sunny

76° 💧 None 💨 3 mph H 44%29.83 inHg

8:00 PM

Clear night

72° 💧 None 💨 2 mph H 52%29.85 inHg

9:00 PM

Clear night

70° 💧 None 💨 1 mph H 57%29.85 inHg

10:00 PM

Clear night

68° 💧 None 💨 0 mph H 60%29.85 inHg

11:00 PM

Clear night

66° 💧 None 💨 1 mph H 64%29.85 inHg

Thursday

12:00 AM

Clear night

64° 💧 None 💨 1 mph H 69%29.85 inHg

1:00 AM

Clear night

62° 💧 None 💨 0 mph H 75%29.85 inHg

2:00 AM

Clear night

61° 💧 None 💨 1 mph H 80%29.85 inHg

3:00 AM

Clear night

59° 💧 None 💨 0 mph H 85%29.85 inHg

4:00 AM

Clear night

58° 💧 None 💨 0 mph H 85%29.85 inHg

5:00 AM

Clear night

58° 💧 None 💨 1 mph H 84%29.85 inHg

6:00 AM

Clear night

58° 💧 None 💨 0 mph H 82%29.85 inHg

7:00 AM

Partly cloudy

57° 💧 None 💨 0 mph H 83%29.85 inHg

8:00 AM

Partly cloudy

60° 💧 None 💨 1 mph H 77%29.88 inHg

9:00 AM

Partly cloudy

66° 💧 None 💨 2 mph H 66%29.88 inHg

10:00 AM

Sunny

71° 💧 None 💨 2 mph H 56%29.88 inHg

11:00 AM

Mostly cloudy

75° 💧 None 💨 4 mph H 48%29.88 inHg

12:00 PM

Partly cloudy

78° 💧 None 💨 5 mph H 41%29.88 inHg

1:00 PM

Overcast

81° 💧 None 💨 5 mph H 36%29.88 inHg

2:00 PM

Overcast

83° 💧 None 💨 7 mph H 35%29.85 inHg

3:00 PM

Overcast

83° 💧 None 💨 9 mph H 34%29.85 inHg

4:00 PM

Overcast

81° 💧 None 💨 8 mph H 34%29.85 inHg

5:00 PM

Overcast

77° 💧 None 💨 6 mph H 39%29.85 inHg

6:00 PM

Overcast

73° 💧 None 💨 5 mph H 47%29.85 inHg

7:00 PM

Overcast

69° 💧 None 💨 5 mph H 55%29.85 inHg

8:00 PM

Mostly cloudy night

67° 💧 None 💨 4 mph H 59%29.85 inHg

9:00 PM

Mostly cloudy night

65° 💧 None 💨 4 mph H 61%29.85 inHg

10:00 PM

Overcast night

64° 💧 None 💨 3 mph H 61%29.88 inHg

11:00 PM

Mostly cloudy night

63° 💧 None 💨 3 mph H 58%29.88 inHg

Friday

12:00 AM

Partly cloudy night

63° 💧 None 💨 3 mph H 51%29.88 inHg

1:00 AM

Clear night

61° 💧 None 💨 3 mph H 50%29.88 inHg

2:00 AM

Clear night

60° 💧 None 💨 3 mph H 53%29.88 inHg

3:00 AM

Clear night

59° 💧 None 💨 3 mph H 61%29.91 inHg

4:00 AM

Clear night

58° 💧 None 💨 3 mph H 71%29.91 inHg

5:00 AM

Mostly clear night

58° 💧 None 💨 3 mph H 83%29.91 inHg

8:00 AM

Partly cloudy

60° 💧 None 💨 6 mph H 95%29.94 inHg

11:00 AM

Mostly sunny

71° 💧 None 💨 8 mph H 58%29.97 inHg

2:00 PM

Mostly cloudy

79° 💧 None 💨 10 mph H 38%29.94 inHg

5:00 PM

Overcast

76° 💧 None 💨 10 mph H 42%29.88 inHg

8:00 PM

Mostly cloudy night

66° 💧 None 💨 4 mph H 62%29.88 inHg

11:00 PM

Mostly clear night

60° 💧 None 💨 3 mph H 70%29.91 inHg

Saturday

2:00 AM

Mostly clear night

55° 💧 None 💨 2 mph H 88%29.91 inHg

5:00 AM

Mostly clear night

51° 💧 None 💨 1 mph H 99%29.88 inHg

8:00 AM

Mostly sunny

53° 💧 None 💨 2 mph H 93%29.91 inHg

11:00 AM

Sunny

68° 💧 None 💨 4 mph H 51%29.88 inHg

2:00 PM

Sunny

78° 💧 None 💨 6 mph H 33%29.83 inHg

5:00 PM

Mostly sunny

78° 💧 None 💨 9 mph H 29%29.80 inHg

8:00 PM

Overcast night

65° 💧 None 💨 4 mph H 48%29.83 inHg

11:00 PM

Partly cloudy night

59° 💧 None 💨 4 mph H 78%29.85 inHg

Sunday

2:00 AM

Overcast night

55° 💧 None 💨 4 mph H 97%29.85 inHg

5:00 AM

Mostly cloudy night

53° 💧 None 💨 2 mph H 99%29.85 inHg

8:00 AM

Overcast

53° 💧 None 💨 4 mph H 99%29.85 inHg

11:00 AM

Mostly sunny

63° 💧 None 💨 6 mph H 69%29.88 inHg

2:00 PM

Sunny

70° 💧 None 💨 8 mph H 52%29.85 inHg

5:00 PM

Sunny

69° 💧 None 💨 10 mph H 54%29.83 inHg

8:00 PM

Clear night

60° 💧 None 💨 6 mph H 74%29.83 inHg

11:00 PM

Clear night

55° 💧 None 💨 3 mph H 94%29.85 inHg

Monday

2:00 AM

Partly cloudy night

54° 💧 None 💨 2 mph H 99%29.88 inHg

5:00 AM

Overcast night

53° 💧 None 💨 1 mph H 98%29.88 inHg

11:00 AM

Sunny

65° 💧 None 💨 4 mph H 66%29.91 inHg

5:00 PM

Sunny

77° 💧 None 💨 10 mph H 33%29.80 inHg

11:00 PM

Clear night

57° 💧 None 💨 2 mph H 86%29.83 inHg

Tuesday

5:00 AM

Clear night

51° 💧 None 💨 2 mph H 98%29.83 inHg

11:00 AM

Sunny

65° 💧 None 💨 4 mph H 61%29.85 inHg

5:00 PM

Sunny

79° 💧 None 💨 8 mph H 33%29.77 inHg

11:00 PM

Clear night

60° 💧 None 💨 4 mph H 73%29.80 inHg

Wednesday

5:00 AM

Mostly cloudy night

53° 💧 None 💨 1 mph H 93%29.80 inHg

11:00 AM

Sunny

72° 💧 None 💨 4 mph H 47%29.85 inHg

5:00 PM

Sunny

81° 💧 None 💨 6 mph H 28%29.80 inHg

11:00 PM

Clear night

65° 💧 None 💨 4 mph H 32%29.83 inHg

Thursday

5:00 AM

Clear night

65° 💧 None 💨 5 mph H 22%29.80 inHg

11:00 AM

Sunny

79° 💧 None 💨 2 mph H 14%29.83 inHg

5:00 PM

Sunny

88° 💧 None 💨 6 mph H 10%29.77 inHg

11:00 PM

Clear night

66° 💧 None 💨 1 mph H 29%29.80 inHg

Friday

5:00 AM

Clear night

60° 💧 None 💨 2 mph H 32%29.80 inHg

11:00 AM

Sunny

81° 💧 None 💨 2 mph H 15%29.85 inHg

5:00 PM

Sunny

90° 💧 None 💨 8 mph H 11%29.77 inHg

11:00 PM

Clear night

69° 💧 None 💨 1 mph H 30%29.80 inHg

Saturday

5:00 AM

Clear night

61° 💧 None 💨 1 mph H 47%29.80 inHg

11:00 AM

Sunny

84° 💧 None 💨 2 mph H 19%29.83 inHg

5:00 PM

Sunny

93° 💧 None 💨 7 mph H 9%29.71 inHg

11:00 PM

Clear night

67° 💧 None 💨 2 mph H 47%29.74 inHg

Sunday

5:00 AM

Partly cloudy night

56° 💧 None 💨 1 mph H 87%29.74 inHg

11:00 AM

Mostly sunny

67° 💧 None 💨 4 mph H 61%29.77 inHg

5:00 PM

Sunny

72° 💧 None 💨 8 mph H 50%29.71 inHg

11:00 PM

Mostly clear night

56° 💧 None 💨 4 mph H 87%29.74 inHg

Monday

5:00 AM

Overcast night

54° 💧 None 💨 3 mph H 97%29.71 inHg

11:00 AM

Sunny

66° 💧 None 💨 4 mph H 59%29.77 inHg

5:00 PM

Sunny

79° 💧 None 💨 9 mph H 32%29.71 inHg

11:00 PM

Clear night

57° 💧 None 💨 1 mph H 80%29.77 inHg

Tuesday

5:00 AM

Clear night

66° 💧 None 💨 12 mph H 19%29.77 inHg

11:00 AM

Mostly sunny

76° 💧 None 💨 13 mph H 12%29.83 inHg

5:00 PM

Sunny

84° 💧 None 💨 8 mph H 7%29.77 inHg

11:00 PM

Clear night

64° 💧 None 💨 2 mph H 22%29.80 inHg

Wednesday

5:00 AM

Clear night

60° 💧 None 💨 3 mph H 29%29.83 inHg

In Napa 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 Napa

TomorrowTomorrow

Mostly cloudy 87°/54° 💧 None 💨 7 mph

Thursday, Sep 24Thu Sep 24

Partly cloudy 83°/57° 💧 None 💨 9 mph

Friday, Sep 25Fri Sep 25

Partly cloudy 79°/58° 💧 0.002 in 💨 10 mph

Saturday, Sep 26Sat Sep 26

Mostly sunny 78°/51° 💧 0.001 in 💨 9 mph

Sunday, Sep 27Sun Sep 27

Overcast 70°/53° 💧 None 💨 10 mph

Monday, Sep 28Mon Sep 28

Overcast 77°/53° 💧 None 💨 10 mph

Tuesday, Sep 29Tue Sep 29

Sunny 79°/51° 💧 None 💨 8 mph

Wednesday, Sep 30Wed Sep 30

Mostly cloudy 81°/53° 💧 None 💨 6 mph

Thursday, Oct 1Thu Oct 1

Sunny 88°/65° 💧 None 💨 6 mph

Friday, Oct 2Fri Oct 2

Sunny 90°/60° 💧 None 💨 8 mph

Saturday, Oct 3Sat Oct 3

Sunny 93°/61° 💧 None 💨 7 mph

Sunday, Oct 4Sun Oct 4

Partly cloudy 72°/56° 💧 None 💨 8 mph

Monday, Oct 5Mon Oct 5

Overcast 79°/54° 💧 None 💨 9 mph

Tuesday, Oct 6Tue Oct 6

Mostly sunny 84°/64° 💧 None 💨 13 mph

Wednesday, Oct 7Wed Oct 7

Sunny 60°/60° 💧 None 💨 3 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Napa

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Napa

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 4:00 PM

PM2.5 Fine particles Good 2,8µg/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 11,1µg/m³

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

O₃ Ozone Fair 79,6µg/m³

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

NO₂ Nitrogen dioxide Good 0,3µg/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 Napa

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 6,3High 🙂Fair

Tomorrow UV 6,6High 🙂Fair

Thursday UV 6,0High 🙂Fair

Friday UV 6,2High 🙂Fair

Saturday UV 6,2High 🙂Fair

Sunday UV 5,0Moderate —Unavailable

Monday UV 6,0High —Unavailable

Hourly UV index today

4:00 PMUV 2,9 5:00 PMUV 1,3 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 Napa

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · NAPA, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 9:00 PM–10:00 PM.

92/100Best-hour score

BEST TIME TONIGHT 9:00 PM–10:00 PM Astronomical darkness: 8:34 PM–5:29 AM

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

☾ Moonlight 87% Waxing Gibbous · Moon about 32° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -7° 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 min5%

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 Napa were last refreshed today at 3:45 PM. The current forecast period extends through 24/09/2026 at 1:00 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.