Cool
Average highs are around 18°C, so pack for cooler days.
January verdict
Mixed for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 7.7h per day, enough for a balanced month. Rainfall averages 53mm, which is relatively low for holiday planning.
Monthly averages
Temp
18°C
Rain
53mm
Sun
7.7h
Weather score
47
Mixed
Cool
Average highs are around 18°C, so pack for cooler days.
Drier
Rainfall averages 53mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.7h per day, enough for a balanced month.
Map
Compare Chula Vista, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
January18°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
January53mm average rain
January is one of Chula Vista's wettest months, so rain is likely to be a major planning factor.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
January7.7 hours average sun
January is one of Chula Vista's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril and July to August
This stretch has the strongest sunshine in the monthly averages.
January47 weather score
January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJuly to September
These months have the strongest weather score in the monthly averages.