Napa Weather in January: Temperature, Precipitation, Wind
Napa, United States in January experiences a mild Mediterranean climate with cool, wet conditions. The average temperature hovers around 10.2°C (50.3°F), with daytime highs reaching 14.5°C (58.0°F) and nighttime lows dipping to 6.0°C (42.8°F). The perceived temperature, or “feels like” temperature, averages 9.5°C (49.1°F), ranging from 14.4°C (58.0°F) at its warmest to 4.5°C (40.0°F) at its coldest.
January in Napa brings substantial rainfall, with an average precipitation of 6.93 cm (2.73 inches). Rain falls on approximately 19 days of the month, covering 23% of the time. The probability of precipitation on any given day is 58.1%. Napa’s famous vineyards and wineries receive ample moisture during this period, crucial for the region’s renowned wine production.
Humidity levels in January average 69.6%, contributing to the cool and damp feel of the winter season. Cloud cover averages 44%, allowing for periods of sunshine between rain showers. The UV index remains moderate at 4.2, indicating some sun protection is still necessary when outdoors.
Wind patterns in Napa during January are notable, with average wind speeds of 27.7 km/h (17.2 mph) and gusts reaching up to 47.3 km/h (29.4 mph). These winds, combined with the cool temperatures, can make outdoor activities in popular spots like the Napa Valley Wine Train or the Oxbow Public Market feel chillier than the thermometer suggests.
Atmospheric pressure averages 1016.2 hPa, typical for winter conditions in the region. Visibility is good, averaging 14.6 km (9.1 miles), allowing for clear views of the surrounding Napa Valley when not obscured by rain or low clouds.
January days in Napa are relatively short, with sunrise occurring around 7:23 AM and sunset at approximately 5:14 PM. The limited daylight hours and cool temperatures make indoor activities, such as wine tasting at renowned wineries like Robert Mondavi or Beringer, appealing during this time of year.
What is the temperature in Napa in January?
Average air temperature in Napa is 10.2°C (50.3°F) in January. The outside temperature in Napa feels like 9.5°C (49.1°F) on a typical January day. The highest average temperature during sunny days is 14.5°C (58°F) and feels like 14.4°C (58°F). The lowest average temperature after dark is 6°C (42.8°F) which feels like 4.5°C (40°F).
How hot is Napa in January?
The hot temperature in January in Napa rises to 19.1°C (66.4°F) on sunny days with low cloud coverage and 69.6% humidity. During hottest days of January it feels like 19.1 °C (66.4°F). The average maximum temp in Napa is 14.5°C (66.4°F) during day time in January.
How cold is Napa in January?
The coldest temp in Napa in January drops to -0.7°C (30.7°F) during the cold nights. With 27.7km/h (17.2mph) winds and 69.6% humidity it feels like -2.5°C (27.5°F) on the coldest nights. The average minimum temperature is 6°C (42.8°F) during night time in January.
Does it rain in Napa in January?
Yes, it rains for 19 days in Napa, United States in January averaging 6.93 mm of precipitation. Napa has a 58.1% chance for rain throughout the entire month of January.
How much does it rain in Napa throughout January?
Napa has 6.93 mm (0.27 inch) of rain per day on average in January. It rains for an average of 19 days out of the entire month.
Is Napa windy in January?
The average speed of wind in Napa, United States during January is 27.7km/h (17.2mph) and average windgust is 47.3km/h (29.4mph). On some days in January wind can reach up to 50.8km/h (31.6mph).
What is the direction of the wind in Napa in January?
Most days of January the wind is blowing from South direction in Napa.
What are the humidity levels in Napa in January?
The average humidity levels in Napa in January are 69.6%. Daily humidity levels in Napa range from 23.7% to 86.2% during January.
How many hours of daylight are in Napa in January?
Napa has 9 hours 51 minutes of daylight in January on average. Sunset and sunrise times gradually change throughout the month. Sunrise in Napa in January is at 7:23:05 and the sunset is at 17:14:13.
What is the cloud coverage in Napa in January?
Clouds cover 44% of the sky on average throughout January in Napa. The cloud coverage ranges from 0% to 98.9% depending on the day of the month.
What is the UV level in January in Napa?
The average UV index in Napa is 4.2 in January. UV levels change throughout the month and range from 1 to 7.
What is the solar radiation in Napa in January?
The average solar radiation is 96.5 W/m2 (Watts per square meter) in Napa during January. However solar radiation levels change throughout the month and range from 16.5 W/m2 to 172 W/m2.
What is the solar energy during January in Napa?
The average solar energy during January in Napa is 8.3 MJ/m2 (megajoules per square metre). Solar energy ranges from 1.3 MJ/m2, to 14.9 MJ/m2 during January.
Are there severe weather risks in Napa in January?
Yes, there is a 10% risk for severe weather in Napa, United States in January.
What is the air pressure in Napa in January?
On average the air pressure in Napa in January is 1016.2 mb (millibars). Throughout the month the sea level pressure ranges from 1003.8 mb to 1028.2 mb.
What is the visibility in Napa in January?
The average daylight visibility in Napa in January is 14.6 km (9.1 miles). Depending on the precipitation the visibility ranges from 8.7 km (5.4 miles) to 16 km (9.9 miles) throughout January.
What is the dew point in Napa in January?
The average dew point in Napa during January is 4.1°C (39.3°F).
Where is the data for Napa climate in January coming from?
The climate data for Napa, California, United States in January is collected from the following weather stations.
- VACAVILLE NUT TREE AIRPORT, CA US
- NAPA CO AIRPORT, CA US
- PETALUMA MUNICIPAL AIRPORT, CA US
- ATLAS PEAK CA US
- Oakville CA US CIMIS
- Black Point CA US CIMIS
- FW1058 American Canyon CA US
- FW7520 Sonoma CA US
- KAPC
- KDVO
- KVCB