Half Moon Bay
California, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Half Moon Bay, CA

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
January, like December, is another mild winter month in Half Moon Bay, California, with average temperature ranging between min 43°F (6.1°C) and max 58.5°F (14.7°C).

Temperature

The coldest month is January, with an average high-temperature of 58.5°F (14.7°C) and an average low-temperature of 43°F (6.1°C).

Rainfall

January is the month with the most rainfall. Rain falls for 12 days and accumulates 5.1" (130.8mm) of precipitation.

Daylight

In Half Moon Bay, the average length of the day in January is 9.9h.

What is the coldest month in Half Moon Bay?

With an average high-temperature of 58.5°F (14.7°C) and an average low-temperature of 43°F (6.1°C), January is the coldest month in Half Moon Bay, California.

What is the temperature in January in Half Moon Bay?

In January, in Half Moon Bay, California, the average high-temperature is 58.5°F (14.7°C), and the average low-temperature is 43°F (6.1°C).

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

In Half Moon Bay, in January, it is raining for 12 days, with typically 5.1" (130.8mm) of accumulated precipitation.

What is the rainiest month in Half Moon Bay?

January is the month with the most rainfall in Half Moon Bay, California. Rain falls for 12 days and accumulates 5.1" (130.8mm) of precipitation.

What is the average length of the day in January in Half Moon Bay?

In January, the average length of the day in Half Moon Bay is 9.9h.
Average temperature in January - Half Moon Bay, CA
  • Average high temperature in January: 58.4°F

The warmest month (with the highest average high temperature) is September (66.8°F).
The month with the lowest average high temperature is January (58.4°F).

  • Average low temperature in January: 42.9°F

The month with the highest average low temperature is August (52.7°F).
The coldest month (with the lowest average low temperature) is January (42.9°F).

Average rainfall in January - Half Moon Bay, CA
  • Average rainfall in January: 5.2"

The wettest month (with the highest rainfall) is January (5.2").
The driest month (with the lowest rainfall) is July (0.1").

Average rainfall days in January - Half Moon Bay, CA
  • Average rainfall days in January: 12 days

The month with the highest number of rainy days is January (12 days).
The month with the lowest number of rainy days is June (3 days).

Average daylight in January - Half Moon Bay, CA
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).