Normal weather for Napa in May
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.
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.
Napa in May |
London | ||
|---|---|---|---|
 Average Temperature |
23°C | 18°C | |
 High Temp |
25°C | 21°C | |
| Low Temp |
21°C | 15°C | |
 Total Precipitation |
8,9 mm | 46 mm | |
| Rainy Days |
3 days | 8 days | |
Start of May
The month of May starts in Napa with warm temperatures, averaging around 23°C during the day and nights close to 10°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
Mid-May
By mid-May, the average daytime temperature stays the same at 23°C, with nights close to 10°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
Temperatures vary between day and night, so it’s smart to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
End of May
By the end of May, the average daytime temperature in Napa will be around 24°C, with nights close to 12°C. No precipitation expected, with plenty of sunshine on the horizon.
As it gets cooler in the evening, it’s best to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
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 May a good time to visit Napa?
Want nice weather? Then May 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 May
With 36°C, Napa hit the highest temperature in the last 10 years in May 2020. The lowest daytime temperature in this month was 13°C in 2019. The extreme night temperatures ranged from a low of 1°C to a high of 16°C.
Check out the climate of Napa for all months and discover the best travel time
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Daily Temperature in May in Napa
This chart shows the average daily temperatures, both day and night, for each day in May 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 May in Napa
The chart below shows the average daily precipitation in May 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 May, you can expect around 3 days of rain in Napa.
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.
Temperature in May in Napa Over the Years
This chart shows the average temperature in May in Napa, measured in degrees Celsius, over the past years.
Total Precipitation in May in Napa Over the Years
This chart shows the average precipitation in May 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 May for Napa
Click on a specific day in May 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 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.
