Temperatures in March
It's cool to moderate in March in Napa with an average temperature of 18°C. Temperatures this month range from a low of 16°C to a high of 21°C. At night, you can expect temperatures between 5°C and 8°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Napa in March. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of March
The month of March starts in Napa with mild temperatures, averaging around 18°C during the day and nights close to 7°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-March
By mid-March, the average daytime temperature rises to around 19°C, with nights close to 7°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of March
By the end of March, the average daytime temperature in Napa will be around 20°C, with nights close to 7°C. A shower might show up, but overall the weather will be dry and sunny.
Precipitation in March
In March, there is an average of 80 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
The average precipitation chance is 28% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in March 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 March |
London | ||
|---|---|---|---|
 Average Temperature |
18°C | 11°C | |
 High Temp |
21°C | 14°C | |
| Low Temp |
16°C | 8°C | |
 Total Precipitation |
80 mm | 55 mm | |
| Rainy Days |
9 days | 9 days | |
February
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is March a good time to visit Napa?
Want nice weather? Then March is a great time to be in Napa. You’ll have pleasant temperatures and not too much rain this month.
Temperature records for Napa in March
With 30°C, Napa hit the highest temperature in the last 10 years in March 2022. The lowest daytime temperature in this month was 9°C in 2023. The extreme night temperatures ranged from a low of -1°C to a high of 15°C.
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Daily Temperature in March in Napa
This chart shows the average daily temperatures, both day and night, for each day in March 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 Precipitation in March in Napa
The chart below shows the average daily precipitation in March 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 March, you can expect around 9 days of rain in Napa.
Daily UV Index in March in Napa
This chart shows the average daily UV index in March 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.
Temperature in March in Napa Over the Years
This chart shows the average temperature in March in Napa, measured in degrees Celsius, over the past years.
Total Precipitation in March in Napa Over the Years
This chart shows the average precipitation in March in Napa, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in March for Napa
Click on a specific day in March 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 March in Napa
Have you been to Napa in March?
Share your weather experience in March in Napa.
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.
