Half Moon Bay, CA Climate


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Half Moon Bay, CA has a mild climate year-round. Average summer temperatures are usually around 65°F-75°F, while winter temperatures average around 55°F-65°F. Rainfall is common in the winter months, but the area sees very little snow. The area experiences a coastal fog most days throughout the year, providing cool temperatures even in the warmest months.

Half Moon Bay, California gets 24 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Half Moon Bay averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 259 sunny days per year in Half Moon Bay. The US average is 205 sunny days.

Half Moon Bay gets some kind of precipitation, on average, 84 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.


Weather Highlights

Summer High: the July high is around 73 degrees
Winter Low: the January low is 42
Rain: averages 24 inches of rain a year
Snow: averages 0 inches of snow a year


Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Half Moon Bay is 8.3 (10=best), which means it is more comfortable than most places in California.

9.2 Summer - 7.3 Winter
September, August and July are the most pleasant months in Half Moon Bay, while January and December are the least comfortable months.

  ClimateHalf Moon Bay, CaliforniaUnited States
  23.7 in.38.1 in.
  0.0 in.27.8 in.
  83.5 days106.2 days
  259 days205 days
  72.5°85.8°
  42.0°21.7°
  8.37
  4.94.3
  75 ft.2443 ft.
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for Half Moon Bay with an average high temperature of 72.9°, which ranks it as one of the coolest places in California. In Half Moon Bay, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Half Moon Bay are August, September and July.
In Half Moon Bay, there are 6.4 days annually when the high temperature is over 90°, which is cooler than most places in California.
January has the coldest nighttime temperatures for Half Moon Bay with an average of 42.0°. This is warmer than most places in California.
In Half Moon Bay, there are 3.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.
In Half Moon Bay, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.
Humidity in Half Moon Bay is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are August, July and September.
January is the wettest month in Half Moon Bay with 4.6 inches of rain, and the driest month is July with 0.1 inches. The wettest season is Spring with 57% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 23.7 inches in Half Moon Bay means that it is wetter than most places in California.
January is the rainiest month in Half Moon Bay with 12.1 days of rain, and June is the driest month with only 2.4 rainy days. There are 83.5 rainy days annually in Half Moon Bay, which is one of the rainiest places in California. The rainiest season is Spring when it rains 42% of the time and the driest is Autumn with only a 9% chance of a rainy day.
There is rarely any recorded snowfall in Half Moon Bay, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in Half Moon Bay.
Reviews for Half Moon Bay
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HMB has one of the best climates in the world. It also has some very good restaurants. You have the ocean on one side and scenic foothills to the east.It would be heaven  More

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Over 18 years ago

Rural coastal living in a great community close to San Francisco and Silicon  More

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Over 19 years ago

I lived in HMB for 17 years and loved (almost) every minute there. Beautiful hills to the east of the town and the Pacific ocean to the west. Close to San Francisco,  More

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