March weather forecast
Half Moon Bay, CA

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A warm and sunny day on a scenic beach in Half Moon Bay, California
A warm and sunny day on a scenic beach in Half Moon Bay, California

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).

Temperature

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). During the month of March, Half Moon Bay identifies an average nighttime low-temperature of 49.3°F (9.6°C), slightly lower than its daytime counterpart.

Humidity

In Half Moon Bay, the average relative humidity in March is 77%.

Rainfall

In Half Moon Bay, in March, during 10.8 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Half Moon Bay, during the entire year, the rain falls for 76.8 days and collects up to 8.54" (217mm) of precipitation.

Daylight

In Half Moon Bay, the average length of the day in March is 11h and 59min.
On the first day of the month, sunrise is at 6:39 am and sunset at 6:04 pm PST. On the last day of March, sunrise is at 6:55 am and sunset at 7:32 pm PDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from PDT to PST.

Sunshine

The average sunshine in March is 7.7h.

UV index

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. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 4 in March interprets into the following advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
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Frequently asked questions

What are the temperatures in Half Moon Bay in March?

The high-temperature, in March, in Half Moon Bay, is 57.7°F (14.3°C), while the low-temperature averages to 49.3°F (9.6°C).

What is the average humidity in March in Half Moon Bay?

The average relative humidity in March in Half Moon Bay is 77%.

How much does it rain in Half Moon Bay in March?

In Half Moon Bay, California, in March, it is raining for 10.8 days, with typically 1.38" (35mm) of accumulated precipitation.

How many hours of daylight does Half Moon Bay have in March?

The average day length in March in Half Moon Bay, California, is 11h and 59min.

When is the sunrise / sunset in March in Half Moon Bay?

On the first day of March, sunrise is at 6:39 am and sunset at 6:04 pm PST. On the last day of the month, sunrise is at 6:55 am and sunset at 7:32 pm PDT.

When does Daylight Saving Time (DST) start in March in Half Moon Bay?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Half Moon Bay, and the time zone changes from PST to PDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How many hours of sunshine does Half Moon Bay have in March?

In March, the average sunshine duration in Half Moon Bay is 7.7h.

What are the months with the lowest UV index in Half Moon Bay?

The months with the lowest UV index in Half Moon Bay, California, are January through May, July, October through December, with an average maximum UV index of 4.

What is the UV index intensity in March in Half Moon Bay?

The average daily maximum UV index in March in Half Moon Bay is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Half Moon Bay, CA

Average temperature in March - Half Moon Bay, CA
  • Average high temperature in March: 57.7°F

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).

  • Average low temperature in March: 49.3°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).

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Average pressure in March
Half Moon Bay, CA

Average pressure in March - Half Moon Bay, CA
  • Average pressure in March: 30.07"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).

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Average wind speed in March
Half Moon Bay, CA

Average wind speed in March - Half Moon Bay, CA
  • Average wind speed in March: 9.1mph

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).

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Average humidity in March
Half Moon Bay, CA

Average humidity in March - Half Moon Bay, CA
  • Average humidity in March: 77%

The month with the highest relative humidity is August (82%).
The months with the lowest relative humidity are November and December (72%).

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Average rainfall in March
Half Moon Bay, CA

Average rainfall in March - Half Moon Bay, CA
  • Average rainfall in March: 1.38"

The wettest month (with the highest rainfall) is February (1.61").
The driest months (with the least rainfall) are June and July (0.12").

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Average rainfall days in March
Half Moon Bay, CA

Average rainfall days in March - Half Moon Bay, CA
  • Average rainfall days in March: 10.8 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).

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Average daylight in March /
Average sunshine in March
Half Moon Bay, CA

Average daylight in March / Average sunshine in March - Half Moon Bay, CA
  • Average daylight in March: 12h and 0min

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 March: 7h 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).

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Average sunshine days in March
Half Moon Bay, CA

Average sunshine days in March - Half Moon Bay, CA
  • Average sunshine days in March: 18.8 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).

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Average UV index in March
Half Moon Bay, CA

Average UV index in March - Half Moon Bay, CA
  • Average UV index in March: 4

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).

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Average cloud cover in March
Half Moon Bay, CA

Average cloud cover in March - Half Moon Bay, CA
  • Average cloud cover in March: 38

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).

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Average visibility in March
Half Moon Bay, CA

Average visibility in March - Half Moon Bay, CA
  • Average visibility in March: 6mi

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).

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Half Moon Bay, California, USA

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