Napa Weather in August: Temperature, Precipitation, Wind
Napa, United States in August experiences a Mediterranean climate characterized by warm, dry conditions. The average temperature hovers around 20.6°C (69.1°F), with daytime highs reaching 27.6°C (81.7°F) and nighttime lows dipping to 15.3°C (59.5°F).
Humidity levels in Napa during August average 67.3%, contributing to a comfortable feel despite the warm temperatures. The region sees minimal precipitation, with an average of 0.0 mm of rainfall and a low 6.5% chance of precipitation on any given day.
Wind patterns in Napa during August are notable, with average wind speeds of 24.9 km/h (15.5 mph) and gusts reaching up to 40.5 km/h (25.2 mph). These breezes help moderate the warm temperatures and contribute to the pleasant climate.
Cloud cover remains relatively low at 23.2%, allowing for ample sunshine. The UV index averages a high 9.4, indicating very strong solar radiation. Visitors and residents should take precautions to protect their skin during outdoor activities.
Napa’s famous vineyards benefit from the August weather conditions. The warm, sunny days and cool nights create an ideal environment for grape ripening. Popular wineries such as Robert Mondavi and Beringer Vineyards showcase the region’s viticultural prowess during this time.
Visibility in Napa during August is excellent, averaging 15.6 km (9.7 miles). This clarity enhances the views of the surrounding Napa Valley, including landmarks like the Napa River and the picturesque rolling hills.
August days in Napa are long, with sunrise occurring around 6:24 AM and sunset at approximately 8:01 PM. These extended daylight hours provide ample time for outdoor activities and wine tasting tours.
What is the temperature in Napa in August?
Average air temperature in Napa is 20.6°C (69.1°F) in August. The outside temperature in Napa feels like 20.6°C (69.1°F) on a typical August day. The highest average temperature during sunny days is 27.6°C (81.7°F) and feels like 27.4°C (81.3°F). The lowest average temperature after dark is 15.3°C (59.5°F) which feels like 15.3°C (59.5°F).
How hot is Napa in August?
The hot temperature in August in Napa rises to 35.8°C (96.4°F) on sunny days with low cloud coverage and 67.3% humidity. During hottest days of August it feels like 34.1 °C (93.4°F). The average maximum temp in Napa is 27.6°C (93.4°F) during day time in August.
How cold is Napa in August?
The coldest temp in Napa in August drops to 10.8°C (51.4°F) during the cold nights. With 24.9km/h (15.5mph) winds and 67.3% humidity it feels like 10.8°C (51.4°F) on the coldest nights. The average minimum temperature is 15.3°C (59.5°F) during night time in August.
Does it rain in Napa in August?
Yes, it rains for 2 days in Napa, United States in August averaging 0 mm of precipitation. Napa has a 6.5% chance for rain throughout the entire month of August.
How much does it rain in Napa throughout August?
Napa has 0 mm (0 inch) of rain per day on average in August. It rains for an average of 2 days out of the entire month.
Is Napa windy in August?
The average speed of wind in Napa, United States during August is 24.9km/h (15.5mph) and average windgust is 40.5km/h (25.2mph). On some days in August wind can reach up to 38.6km/h (24mph).
What is the direction of the wind in Napa in August?
Most days of August the wind is blowing from Southwest direction in Napa.
What are the humidity levels in Napa in August?
The average humidity levels in Napa in August are 67.3%. Daily humidity levels in Napa range from 54.4% to 76.2% during August.
How many hours of daylight are in Napa in August?
Napa has 13 hours 36 minutes of daylight in August on average. Sunset and sunrise times gradually change throughout the month. Sunrise in Napa in August is at 6:24:34 and the sunset is at 20:01:03.
What is the cloud coverage in Napa in August?
Clouds cover 23.2% of the sky on average throughout August in Napa. The cloud coverage ranges from 0.1% to 59% depending on the day of the month.
What is the UV level in August in Napa?
The average UV index in Napa is 9.4 in August. UV levels change throughout the month and range from 8 to 10.
What is the solar radiation in Napa in August?
The average solar radiation is 281.3 W/m2 (Watts per square meter) in Napa during August. However solar radiation levels change throughout the month and range from 204.9 W/m2 to 336.8 W/m2.
What is the solar energy during August in Napa?
The average solar energy during August in Napa is 24.3 MJ/m2 (megajoules per square metre). Solar energy ranges from 17.7 MJ/m2, to 28.9 MJ/m2 during August.
Are there severe weather risks in Napa in August?
Yes, there is a 10% risk for severe weather in Napa, United States in August.
What is the air pressure in Napa in August?
On average the air pressure in Napa in August is 1012.4 mb (millibars). Throughout the month the sea level pressure ranges from 1005.5 mb to 1016.4 mb.
What is the visibility in Napa in August?
The average daylight visibility in Napa in August is 15.6 km (9.7 miles). Depending on the precipitation the visibility ranges from 11.6 km (7.2 miles) to 16 km (9.9 miles) throughout August.
What is the dew point in Napa in August?
The average dew point in Napa during August is 13.8°C (56.8°F).
Where is the data for Napa climate in August coming from?
The climate data for Napa, California, United States in August is collected from the following weather stations.
- VACAVILLE NUT TREE AIRPORT, CA US
- NAPA CO AIRPORT, CA US
- PETALUMA MUNICIPAL AIRPORT, CA US
- FW1058 American Canyon CA US
- FW7520 Sonoma CA US
- KAPC
- KDVO
- KVCB