Search Menu

Temperatures in December

It's cool to moderate in December in Napa with an average temperature of 15°C. Temperatures this month range from a low of 13°C to a high of 17°C. At night, you can expect temperatures between 2°C and 7°C.

Max and Min Temperatures per Day

Daily Temperature in December in Napa

This chart shows the daily maximum and minimum temperatures in degrees Celsius for Napa in December. The red line indicates the max temperatures, and the blue line shows the minimums.

Start of December

The month of December starts in Napa with cool temperatures, averaging around 16°C during the day and nights close to 6°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.

Mid-December

By mid-December, the average daytime temperature drops to around 15°C, with nights close to 5°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.

End of December

By the end of December, the average daytime temperature in Napa will be around 14°C, with nights close to 4°C. A shower might show up, but overall the weather will be dry and sunny.

Discover cheap trips to Napa Link

Precipitation in December

In December, there is an average of 107 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the Southeast.

The average precipitation chance is 30% per day this month. Though it seems pretty low, the weather’s variable. There are also a few days with higher precipitation chances.

Precipitation Chance

Daily precipitation chance in percentages for Napa in December

This chart shows the daily precipitation chance (in percentages) in December for Napa. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.

Napa in December

London
Temperature Average Temperature
15°C 9°C
Sun High Temp
17°C 11°C
Sun Low Temp
13°C 8°C
Rain Total Precipitation
107 mm 67 mm
Rain Rainy Days
9 days 10 days

UV index

The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.

Is December a good time to visit Napa?

Looking for sun and warm weather? Then December isn’t the best time to be in Napa. The temperature is too low this month for a warm stay.

Temperature records for Napa in December

With 26°C, Napa hit the highest temperature in the last 10 years in December 2020. The lowest daytime temperature in this month was 6°C in 2022. The extreme night temperatures ranged from a low of -4°C to a high of 14°C.

Check out the climate of Napa for all months and discover the best travel time

Plan your next holiday

Don’t miss the best holiday deals for Napa and see what our partners have for you.

Daily Temperature in December in Napa

This chart shows the average daily temperatures, both day and night, for each day in December in Napa, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.

Daily Temperature in December in Napa

Daily Precipitation in December in Napa

The chart below shows the average daily precipitation in December for Napa, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 9 days of rain in Napa.

Daily Precipitation in December in Napa

Daily UV Index in December in Napa

This chart shows the average daily UV index in December in Napa, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Daily UV Index in December in Napa

Temperature in December in Napa Over the Years

This chart shows the average temperature in December in Napa, measured in degrees Celsius, over the past years.

Temperature in December in Napa Over the Years

Total Precipitation in December in Napa Over the Years

This chart shows the average precipitation in December in Napa, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.

Precipitation in December in Napa Over the Years

Daily climate in December for Napa

Click on a specific day in December for detailed info on the typical weather on that day in Napa. Check out the historical temperatures and precipitation over the past 10 years on this day.

Weather experiences in December in Napa

Have you been to Napa in December?

Share your weather experience in December in Napa.

Your email will not be shown in the review and will not be shared with others.

Average Weather in Napa by Month

Click on a month below to see detailed weather info for Napa. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.


Or check out the climate of Napa for all months at once

Terug naar boven