Half Moon Bay (CA) Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore Half Moon Bay’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.
Monthly Temperature Averages
Half Moon Bay sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Typically, maximum daytime temperatures range from a comfortable 22°C in September to a moderate 15°C in the coolest month, December. Nights are cooler, with temperatures generally dropping to 6°C, particularly during the colder months.
The chart below illustrates the average maximum day and minimum night temperatures in Half Moon Bay by month:
The early hours of 4 AM to 6 AM often see the lowest temperatures, while 3 PM marks the peak of the day’s heat as the sun’s impact is strongest. September, the city’s warmest month, boasts 270 hours of sunshine.
The chart below shows the average temperature throughout the year:
December, the city’s coldest month, receives about 144 mm of rainfall spread over roughly 14 days. For more information, please visit our Half Moon Bay Precipitation page.
Annual Temperatures in the United States of America Compared
The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.
very warm
warm
pleasant
moderate
cold
very cold
Half Moon Bay Temperatures Compared World Wide
Half Moon Bay’s average annual maximum temperature is 19°C. Let’s compare this with some popular tourist destinations:
In Barcelona, Spain, the average annual temperature is around 21°C, resulting in warm summers and mild winters throughout the year.
Meanwhile, Queenstown, New Zealand, the average annual temperature is significantly lower at 10°C, with mild summers and cold winters.
In Shanghai, China, the annual average temperature is 21°C, offering warm summers and mild winters.
In Brisbane, Australia, the average annual temperature is 26°C, making it warmer than Sydney.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
In Half Moon Bay, during the coolest month, December, you will experience 78% humidity, which is considered high. This is accompanied by an average maximum temperature of 15°C. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Effects of Temperature on Weather and Climate
Temperature variations influence precipitation patterns in Amsterdam:
Rainfall: Warm air holds more moisture, leading to heavier rain during warmer months. However, precipitation is generally moderate year-round.
Snow: Occasional snowfall occurs in winter, though it rarely lasts very long.
For more detailed information about Half Moon Bay’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Half Moon Bay climate page.
Current temperature in Half Moon Bay (CA)
3 m/s
broken clouds and chance of slight rain
8 m/s
broken clouds and rain
5 m/s
partly cloudy and no rain
