Cool
Average highs are around 14°C, so pack for cooler days.
January verdict
Half Moon Bay, California, United States in January
Weather score24Poor
Poor for holiday weather
Average highs are around 14°C, so pack for cooler days. Sunshine averages 5.7h per day, enough for a balanced month. Rainfall averages 146mm, so some wet days are possible.
January weather
Monthly averages
Temp
14°C
Rain
146mm
Sun
5.7h
Sea
12°C
Weather score
24
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 146mm, so some wet days are possible.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Weather map
Compare Half Moon Bay, California, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
January14°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJune to October
This stretch sets the upper range for average daytime heat.
Rain
January146mm average rain
January is one of Half Moon Bay'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.
Sun
January5.7 hours average sun
January is below Half Moon Bay's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
January12°C average sea
January is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJuly to October
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
January24 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 monthsMay to September
These months have the strongest weather score in the monthly averages.
