Napa Climate and Average Weather
Climate of Napa: average temperatures, rainfall and seasons month by month.
Climate in Napa month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 59° | 41° | 3,9 in | ★★★☆☆ |
| February | 60° | 43° | 7,4 in | ★★☆☆☆ |
| March | 65° | 45° | 3,5 in | ★★★★☆ |
| April | 68° | 46° | 2,2 in | ★★★★☆ |
| May | 76° | 51° | 0,6 in | ★★★★★ |
| June | 82° | 54° | 0,0 in | ★★★★★ |
| July | 85° | 56° | 0,0 in | ★★★★★ |
| August | 87° | 57° | 0,1 in | ★★★★★ |
| September | 82° | 56° | 0,3 in | ★★★★★ |
| October | 77° | 53° | 0,9 in | ★★★★★ |
| November | 65° | 46° | 4,4 in | ★★★☆☆ |
| December | 59° | 43° | 7,0 in | ★★☆☆☆ |
Climate type: Mediterranean. Source: Open-Meteo archive (ERA5).
Recent extremes in Napa
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Napa compares with nearby places
Annual averages, and the difference against Napa.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Alcatraz Island | 33 mi | 57°F | 34°F cooler | 25 in |
| Fisherman's Wharf | 35 mi | 57°F | 34°F cooler | 25 in |
| Golden Gate Bridge | 35 mi | 57°F | 34°F cooler | 25 in |
| ZIP Code 94133 | 35 mi | 57°F | 34°F cooler | 25 in |
| ZIP Code 94102 | 37 mi | 57°F | 34°F cooler | 25 in |
Best time to visit Napa
Go in May, June, July, August and September. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for Napa
Today is about average for August. The forecast high of 88°F is in line with the 87°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 53°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
Napa is a city in California. Napa is known for Wine country tasting rooms. It has a population of about 80.000.
Right now it is 78°F (26°C) in Napa with overcast. It feels like 78°F. Today runs from 54°F to 88°F. Chance of precipitation is 0%. Sightseeing conditions score 9.6/10 - excellent - go now.
The best time to visit Napa is May, June, July, August and September. The climate is Mediterranean. January, February and December tend to be the least comfortable months. August is the warmest month with average highs near 87°F, while January is the coldest with lows near 41°F.
The closest major airport is San Francisco International Airport (SFO), about 47 mi away. Nearby highlights include Alcatraz Island, Golden Gate Bridge, Point Lobos State Natural Reserve and Emerald Bay State Park.
In plain terms. Today is about average for August. The forecast high of 88°F is in line with the 87°F typical for this month. The best window to be outside is roughly 10 AM to 1 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in Napa today at 9.6/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Napa
| Type | City |
|---|---|
| State | California |
| Country | United States |
| Continent | North America |
| Coordinates | 38°17′51″N 122°17′12.8″W (38.2975, -122.2869) |
| Population | 80.000 |
| Known for | Wine country tasting rooms |
| Local time | 7:04 PM (UTC-07:00) |
| Best months | May, June, July, August and September |
| Climate | Mediterranean |
Weather map for Napa
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Napa
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Napa?
Napa is a city in California. Its coordinates are 38.2975, -122.2869. It lies in North America.
What is the weather like in Napa right now?
It is currently 78°F (26°C) with overcast. Humidity is 52% and wind is 7 mph.
When is the best time to visit Napa?
May, June, July, August and September offer the most comfortable conditions in Napa, which has a Mediterranean climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Napa in?
Napa observes America/Los_Angeles (UTC-07:00). The local time is 7:04 PM.
How many people live in Napa?
Napa has a population of approximately 80.000.
What is the nearest airport to Napa?
The closest airports are San Francisco International Airport (SFO), 47 mi away.
What are the top things to do in Napa?
Popular options include Alcatraz Island, Golden Gate Bridge, Point Lobos State Natural Reserve, Emerald Bay State Park, Lake Tahoe and Pinnacles National Park.
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| Place data | USPOTUS Atlas dataset (cities-us) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 7:04 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
