Napa Valley weather in March
Temperature, rain and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Excellent
Best time to visit: April – October
What is the weather like in Napa Valley in March?
In March, Napa Valley is mild: daytime highs average 17 °C, and nights cool down to about 7 °C. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 79 mm. All in all, March is an excellent month for a holiday in Napa Valley.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 70 | 84 | 99 |
| Day | 16° | 17° | 20° |
| Night | 6° | 7° | 8° |
| Sun | 6 h | 7 h | 9 h |
| Rain days | 9 | 8 | 5 |
More details for March
- Daylight
- 11 h 53 min07:22 – 19:15
- UV index
- 6 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 14 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %63 %
- Few rainy daysweight 30 %70 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in March
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Napa Valley in March: quick answers
Is Napa Valley hot in March?
No. In March, Napa Valley is mild: daytime highs average 17 °C and nights drop to about 7 °C.
Does it rain much in Napa Valley in March?
Rain falls on about 8 days, adding up to 79 mm.
Napa Valley month by month
The whole year in Napa ValleyAll destinations: USAWhere to go in March
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences