United StatesAverage weather for Vallejo in January
It's cool to moderate in January in Vallejo with an average temperature of 15°C. Temperatures this month range from a low of 13°C to a high of 18°C. At night, you can expect temperatures between 3°C and 8°C.
Start of January
The month of January starts in Vallejo with cool temps, averaging around 15°C during the day and nights around 6°C. There are plenty of days with a good chance of precipitation.
Mid January
By mid-January, daytime temps stay steady at around 15°C, with nights around 6°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of January
By the end of January, the average daytime temperature in Vallejo is around 17°C, while nighttime temps are about 6°C. A shower might pop up, but overall, the weather will be dry and sunny.
In January, there is an average of 148 mm of precipitation, spread over 8 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Vallejo in January |
New York | ||
|---|---|---|---|
 Average temperature |
15°C | 5°C | |
 Max. temperature |
18°C | 11°C | |
| Min. temperature |
13°C | -5°C | |
 Total precipitation |
148 mm | 97 mm | |
| Rainy days |
8 days | 12 days | |
December
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is January a good time to visit Vallejo?
Looking for sun and warm weather? January isn’t a good month to be in Vallejo. The temperatures are too low for a warm stay this month.
Temperature records
With 27°C in 2021, Vallejo reached the highest temperature in January over the past 10 years. The lowest daytime temperature in this month was 8°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -3°C to a highest value of 15°C.
Check out the climate of Vallejo for all months and discover the best travel time
Daily Temperature in January in Vallejo
This chart shows the average daily high and low temperatures in January for Vallejo, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in January in Vallejo
The chart below shows the average daily precipitation in January for Vallejo, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for January, you can expect about 8 days of precipitation in Vallejo.
Daily UV index in January in Vallejo
This chart shows the average daily UV index in January in Vallejo, 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 January in Vallejo over the years
This chart shows the average temperature in January in Vallejo, measured in degrees Celsius, over the past few years.
Total precipitation in January in Vallejo over the years
This chart shows the average precipitation in January in Vallejo, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in January for Vallejo
Click on any day in January to get detailed info about the usual weather on that day in Vallejo. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in January in Vallejo
Have you been to Vallejo in January?
Share your weather experience in January in Vallejo.
Average weather in Vallejo by month
Click on a month below to see detailed weather info for Vallejo. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
