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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
A warm and sunny day on a scenic beach in Half Moon Bay, California
Weather in January
January, the same as December, in Half Moon Bay, California, is another mild winter month, with an average temperature fluctuating between 56.1°F (13.4°C) and 49.1°F (9.5°C). As December turns into January, the average high-temperatures rest at a still mild 56.1°F (13.4°C), showing a minor variation from the prior month. Weather in January »
Weather in February
February, the last month of the winter in Half Moon Bay, is another mild month, with an average temperature varying between 48.7°F (9.3°C) and 56.7°F (13.7°C). Half Moon Bay experiences an average high-temperature of a still moderate 56.7°F (13.7°C) in February, marking an insignificant shift from 56.1°F (13.4°C) in January. Weather in February »
Weather in March
The first month of the spring, March, is still a refreshing month in Half Moon Bay, California, with temperature in the range of an average high of 57.7°F (14.3°C) and an average low of 49.3°F (9.6°C). The beginning of March records an average high-temperature of a still mild 57.7°F (14.3°C), marking a negligible difference from February's 56.7°F (13.7°C). Weather in March »
Weather in April
April, like March, is another mild spring month in Half Moon Bay, California, with temperature in the range of an average low of 50°F (10°C) and an average high of 58.6°F (14.8°C). In the transition from March to April, Half Moon Bay reports an average high-temperature of a still moderate 58.6°F (14.8°C), indicating a close resemblance to the prior month. Weather in April »
Weather in May
May, the last month of the spring in Half Moon Bay, is also a moderate month, with temperature in the range of an average low of 51.4°F (10.8°C) and an average high of 60.4°F (15.8°C). Half Moon Bay, California, in May witnesses an average high-temperature of a still refreshing 60.4°F (15.8°C), indicating a slight variation from April's 58.6°F (14.8°C). Weather in May »
Weather in June
June, the first month of the summer in Half Moon Bay, is a comfortable month, with an average temperature fluctuating between 63.7°F (17.6°C) and 53.6°F (12°C). With the transition into June, Half Moon Bay notes an average high-temperature of a still refreshing 63.7°F (17.6°C), closely resembling May. Weather in June »
Weather in July
July, like June, in Half Moon Bay, California, is another enjoyable summer month, with an average temperature ranging between max 65.1°F (18.4°C) and min 54.3°F (12.4°C). Half Moon Bay observes a minor difference in average high-temperatures between June's 63.7°F (17.6°C) and July's 65.1°F (18.4°C). Weather in July »
Weather in August
August, the last month of the summer in Half Moon Bay, is also an enjoyable month, with an average temperature fluctuating between 55.9°F (13.3°C) and 65.8°F (18.8°C). August's beginning signals an average high-temperature of a still refreshing 65.8°F (18.8°C), barely different from July's 65.1°F (18.4°C). Weather in August »
Weather in September
September, the first month of the autumn in Half Moon Bay, is also an enjoyable month, with an average temperature varying between 66.9°F (19.4°C) and 56.7°F (13.7°C). In Half Moon Bay, September is the month with the highest recorded average temperatures, measuring a high of 66.9°F (19.4°C) and a low of 56.7°F (13.7°C). Weather in September »
Weather in October
October, like September, in Half Moon Bay, California, is another comfortable autumn month, with an average temperature varying between 55.9°F (13.3°C) and 64.6°F (18.1°C). Half Moon Bay experiences an average high-temperature of a still refreshing 64.6°F (18.1°C) in October, marking an insignificant shift from 66.9°F (19.4°C) in September. Weather in October »
Weather in November
November, the last month of the autumn in Half Moon Bay, is another mild month, with an average temperature varying between 52.9°F (11.6°C) and 60.3°F (15.7°C). Half Moon Bay marks the onset of November with an average high-temperature of a mild 60.3°F (15.7°C), a subtle shift from October's 64.6°F (18.1°C). Weather in November »
Weather in December
The first month of the winter, December, is also a moderate month in Half Moon Bay, California, with an average temperature ranging between min 49.3°F (9.6°C) and max 55.6°F (13.1°C). December, characterized by an average high temperature of 55.6°F (13.1°C) and a low temperature of 49.3°F (9.6°C), is generally the coldest month. Weather in December »
[Resources]Frequently asked questions
How much does it rain in Half Moon Bay?
Throughout the year, there are 76.8 rainfall days, and 8.54" (217mm) of precipitation is accumulated.
What is the month with the lowest UV index in Half Moon Bay?
The months with the lowest UV index in Half Moon Bay are January through May, July, October through December, with an average maximum UV index of 4.
What is the wettest month in Half Moon Bay?
The month with the most rainfall is February, when the rain falls for 7.5 days and typically aggregates up to 1.61" (41mm) of precipitation.
When is Daylight Saving Time (DST) in Half Moon Bay?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Half Moon Bay, California, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
What is the driest month in Half Moon Bay?
June and July are months with the least rain in Half Moon Bay when the rain falls for 3 days and typically aggregates up to 0.12" (3mm) of rain.
When are the longest days in Half Moon Bay?
With an average of 14h and 42min of daylight, June has the longest days of the year in Half Moon Bay.
What is the month with the highest UV index in Half Moon Bay?
June, August and September, with an average maximum UV index of 5, are months with the highest UV index in Half Moon Bay, California.
What month has the most sunshine in Half Moon Bay?
July has the most sunshine of the year in Half Moon Bay, California, with an average of 11.4h of sunshine.
What is the most humid month in Half Moon Bay?
The most humid month is August, with an average relative humidity of 82%.
What are the warmest months in Half Moon Bay?
In Half Moon Bay, September is the month with the highest recorded average temperatures, measuring a high of 66.9°F (19.4°C) and a low of 56.7°F (13.7°C).
What is the least humid month in Half Moon Bay?
The months with the lowest humidity in Half Moon Bay, California, are November and December, with an average relative humidity of 72%.
What is the coldest month in Half Moon Bay?
Half Moon Bay records the coldest temperatures in December, averaging a high of 55.6°F (13.1°C) and a low of 49.3°F (9.6°C).
What is the month with the shortest days in Half Moon Bay?
With an average of 9h and 36min of daylight, December has the shortest days of the year.
What is the month with the least sunshine in Half Moon Bay?
The month with the least sunshine is December, with an average of 5.7h of sunshine.
Average temperature
Half Moon Bay, CA
The warmest month (with the highest average high temperature) is September (66.9°F).
The month with the lowest average high temperature is December (55.6°F).
The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure
Half Moon Bay, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.04"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.94"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed
Half Moon Bay, CA
- Average wind speed in January:
7.5mph - Average wind speed in February:
9mph - Average wind speed in March:
9.1mph - Average wind speed in April:
9.6mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.4mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7mph - Average wind speed in October:
7.1mph - Average wind speed in November:
7.4mph - Average wind speed in December:
8.4mph
The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Half Moon Bay, CA
The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are November and December (72%).
Average rainfall
Half Moon Bay, CA
- Average rainfall in January:
1.22" - Average rainfall in February:
1.61" - Average rainfall in March:
1.38" - Average rainfall in April:
0.43" - Average rainfall in May:
0.43" - Average rainfall in June:
0.12"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.16" - Average rainfall in September:
0.16" - Average rainfall in October:
0.43" - Average rainfall in November:
0.98" - Average rainfall in December:
1.5"
The wettest month (with the highest rainfall) is February (1.61").
The driest months (with the least rainfall) are June and July (0.12").
Average rainfall days
Half Moon Bay, CA
- Average rainfall days in January:
9.2 days - Average rainfall days in February:
7.5 days - Average rainfall days in March:
10.8 days - Average rainfall days in April:
7.2 days - Average rainfall days in May:
6.8 days - Average rainfall days in June:
3 days
- Average rainfall days in July:
4.4 days - Average rainfall days in August:
5.3 days - Average rainfall days in September:
3.6 days - Average rainfall days in October:
4.9 days - Average rainfall days in November:
5.7 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (3 days).
Average daylight / Average sunshine
Half Moon Bay, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
6h and 0min - Average sunshine in February:
6h and 2min - Average sunshine in March:
7h and 4min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 1min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 2min - Average sunshine in August:
11h and 1min - Average sunshine in September:
10h and 4min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 3min - Average sunshine in December:
5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Half Moon Bay, CA
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
19.5 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
22 days - Average sunshine days in May:
20.9 days - Average sunshine days in June:
23.4 days
- Average sunshine days in July:
21.8 days - Average sunshine days in August:
18.8 days - Average sunshine days in September:
22.6 days - Average sunshine days in October:
24.6 days - Average sunshine days in November:
22.9 days - Average sunshine days in December:
21.1 days
The month with the most sunshine days is October (24.6 days).
The months with the least sunshine days are March and August (18.8 days).
Average UV index
Half Moon Bay, CA
The months with the highest UV index are June, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, May, July, October, November and December (UV index 4).
Average cloud cover
Half Moon Bay, CA
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility
Half Moon Bay, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Half Moon Bay, California, USA
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