Mild
Average highs are around 22°C, so days are mild rather than hot.
Weather Guide
Half Moon Bay, California, United States Average Monthly Weather
Weather score46Mixed annual avg
Best months: July, August, September
Across the year, average daytime temperatures are around 18°C, sunshine averages 8.3h per day, and rainfall totals about 691mm. Sea temperatures average 13°C across the year.
Annual weather
Annual averages
Temp
18°C
Rain
691mm
Annual total
Sun
8.3h
Sea
13°C
Weather score
46
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 2mm, which is relatively low for holiday planning.
Bright
Sunshine averages 10h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 14°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
July22°C average high
July sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to October
This stretch sets the upper range for average daytime heat.
Rain
July2mm average rain
July is one of Half Moon Bay's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July10 hours average sun
July is one of Half Moon Bay's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July14°C average sea
July sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to October
Sea temperatures are usually near 14°C in this stretch, so swimming comfort is at its strongest.
Weather score
July64 weather score
July is one of Half Moon Bay's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsMay to September
These months have the strongest weather score in the monthly averages.
