What’s the climate like in Half Moon Bay?
The current climate of Half Moon Bay features average monthly temperatures ranging from highs of 20°C during the day to lows of 15°C. The average yearly temperature is around 18°C. At night, temperatures in the colder months average around 7°C and in the warmer months around 14°C.
The highest temperature recorded in Half Moon Bay in recent years was 38°C in September 2017. The lowest daytime temperature recorded was 8°C in February 2023.
On average, Half Moon Bay receives 403 mm of precipitation each year. For comparison, London gets 701 mm of precipitation annually.
Best time to visit Half Moon Bay?
The best time to visit Half Moon Bay for sunny weather is June through October. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Half Moon Bay. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Half Moon Bay
The climate table of Half Moon Bay shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 15 | 16 | 15 | 16 | 16 | 18 | 18 | 20 | 20 | 20 | 17 | 15 |
| Temp. min (°C) | 8 | 8 | 8 | 9 | 11 | 12 | 13 | 14 | 13 | 11 | 8 | 8 |
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| Precipitation (mm) | 60 | 64 | 58 | 30 | 11 | 4,7 | 4,2 | 1,1 | 2,7 | 23 | 42 | 102 |
| UV Index | 3 | 3 | 5 | 4 | 5 | 4 | 5 | 5 | 6 | 4 | 3 | 3 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 18°C
- Highest temperature: 20°C in August, September and October
- Lowest temperature: 15°C in January, March and December
- Precipitation: 403 mm per year, averaging 34 mm per month
- Driest months: 1,1 mm in August, 2,7 mm in September and 4,2 mm in July
- Wettest months: 102 mm in December, 64 mm in February and 60 mm in January
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Table of Contents
Average Temperature per Month in Half Moon Bay
This graph shows the average maximum temperatures per month in Half Moon Bay, California. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Half Moon Bay
This graph shows how much precipitation Half Moon Bay, California, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average UV Index per Month in Half Moon Bay
This graph shows the average UV index per month in Half Moon Bay, California. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Half Moon Bay
This graph shows the average yearly temperature in Half Moon Bay, California. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Half Moon Bay
This chart shows the total yearly precipitation in Half Moon Bay, California, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Weather experiences in Half Moon Bay
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Average Weather in Half Moon Bay by Month
Click on a month below to see detailed weather info for Half Moon Bay. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
