Weathermondo.com
United StatesThe weather in May in Napa
It's warm in May in Napa with an average temperature of 23°C. Temperatures this month range from a low of 21°C to a high of 25°C. At night, you can expect temperatures between 8°C and 12°C.
Looking for great weather? May is a good time to be in Napa. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Napa, California. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 36°C in 2020, Napa reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 13°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 16°C.
Rainfall amount
According to weather history, there is only 8,9 mm of precipitation in May. The wind speed is around 4 Bft, mostly coming from the Southwest.
Daily weather in May for Napa
Click on any day in May to get detailed info about the usual weather on that day in Napa. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Napa | New York | |
|---|---|---|
| Average temperature | 23°C | 22°C |
| Max. temperature | 25°C | 28°C |
| Min. temperature | 8°C | -5°C |
| Total precipitation | 8,9 mm | 105 mm |
| Rainy days | 3 days | 14 days |
Start of May
The month of May starts in Napa with warm temps, averaging around 23°C during the day and nights around 10°C.
Mid May
By mid-May, daytime temps stay steady at around 23°C, with nights around 10°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of May
By the end of May, the average daytime temperature in Napa is around 24°C, while nighttime temps are about 12°C. No precipitation expected at the end of the month; it’ll be mostly sunny.
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.
Check out the climate of Napa for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Napa, California. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Napa
Temperature in May in Napa over the years
Precipitation charts
These charts show the average amount of precipitation in May in Napa, California. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Napa
Total precipitation in May in Napa over the years
Daily UV index in May in Napa
This chart shows the average daily UV index in May 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.
Weather experiences in May in Napa
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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.