Temperatures in April
It's pleasantly warm in April in Napa with an average temperature of 21°C. Temperatures this month range from a low of 18°C to a high of 25°C. At night, you can expect temperatures between 6°C and 10°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Napa in April. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of April
The month of April starts in Napa with mild temperatures, averaging around 20°C during the day and nights close to 8°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-April
By mid-April, the average daytime temperature rises to around 21°C, with nights close to 8°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of April
By the end of April, the average daytime temperature in Napa will be around 23°C, with nights close to 9°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
Precipitation in April
In April, there is an average of 31 mm of precipitation, spread over 4 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
The precipitation chance averages 13% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in April 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 April |
London | ||
|---|---|---|---|
 Average Temperature |
21°C | 15°C | |
 High Temp |
25°C | 18°C | |
| Low Temp |
18°C | 12°C | |
 Total Precipitation |
31 mm | 29 mm | |
| Rainy Days |
4 days | 7 days | |
March
UV index
The UV index is a maximum of 9 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 April a good time to visit Napa?
Want nice weather? Then April 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 April
With 31°C, Napa hit the highest temperature in the last 10 years in April 2015. The lowest daytime temperature in this month was 12°C in 2014. The extreme night temperatures ranged from a low of 0°C to a high of 15°C.
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Daily Temperature in April in Napa
This chart shows the average daily temperatures, both day and night, for each day in April 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 April in Napa
The chart below shows the average daily precipitation in April 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 April, you can expect around 4 days of rain in Napa.
Daily UV Index in April in Napa
This chart shows the average daily UV index in April 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 April in Napa Over the Years
This chart shows the average temperature in April in Napa, measured in degrees Celsius, over the past years.
Total Precipitation in April in Napa Over the Years
This chart shows the average precipitation in April 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 April for Napa
Click on a specific day in April 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 April in Napa
Have you been to Napa in April?
Share your weather experience in April 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.
