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Napa Weather Forecast

Temperature, wind, rain and more for Napa

California, United States Of America

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 15
Dec		01:00

ENE
ENE

 3 / 6 mph 41 / 40°F 72% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 34%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 2 / 5 mph 42 / 41°F 70% 1024 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 3 / 6 mph 41 / 40°F 71% 1025 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 2 / 2 mph 53 / 53°F 56% 1026 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 97%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 2 / 2 mph 60 / 59°F 46% 1025 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 22%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 2 / 3 mph 57 / 57°F 53% 1023 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 14%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 0 / 1 mph 52 / 52°F 57% 1023 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 74%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 1 / 2 mph 50 / 50°F 60% 1023 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 33%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 16
Dec		19:00

SSW
SSW

 3 / 4 mph 60 / 60°F 80% 1021 mb
Low level cloud: 99%
Mid level cloud: 33%
High level cloud: 83%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 4 / 6 mph 59 / 59°F 95% 1022 mb
Low level cloud: 99%
Mid level cloud: 27%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
The 7 day weather forecast summary for Napa:

Over the next 7 days the Napa forecast suggests the average daytime maximum temperature will be around 17°C, with a high for the week of 20°C expected on the afternoon of Tuesday 16th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Tuesday 23rd at 6°C. The week ahead will have mixed overhead conditions with some days dry and some seeing a significant amount of rain. Current predictions suggest Monday 23rd will have the most precipitation with an accumulation of around 27.0mm. On the whole winds are likely to be light.

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure