Gilroy
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Gilroy, CA

A colorful sunset sky over the hilly region of Gilroy in California
A colorful sunset sky over the hilly region of Gilroy in California
December, the first month of the winter, in Gilroy, is still a mild month, with average temperature fluctuating between 60.1°F (15.6°C) and 37°F (2.8°C).

Temperature

January and December, with an average high-temperature of 60.1°F (15.6°C), are the coldest months.

Rainfall

In Gilroy, California, during December, the rain falls for 6 days and regularly aggregates up to 3.7" (94.5mm) of precipitation. Throughout the year, there are 36 rainfall days, and 20.8" (528.9mm) of precipitation is accumulated.

Daylight

The month with the shortest days in Gilroy is December, with an average of 9.7h of daylight.

What are the coldest months in Gilroy?

January and December, with an average high-temperature of 60.1°F (15.6°C), are the coldest months.

What is the temperature in December in Gilroy?

The average high-temperature, in December, in Gilroy, is 60.1°F (15.6°C), while the average low-temperature is 37°F (2.8°C).

How many days does it rain in December in Gilroy?

In Gilroy, California, during December, the rain falls for 6 days and regularly aggregates up to 3.7" (94.5mm) of precipitation.

What is the month with the shortest days in Gilroy?

The month with the shortest days in Gilroy, California, is December, with an average of 9.7h of daylight.

What is the average length of the day in December in Gilroy?

In Gilroy, the average length of the day in December is 9.7h.
Average temperature in December - Gilroy, CA
  • Average high temperature in December: 60°F

Warmest months (with the highest average high temperature) are July and August (88°F).
Months with the lowest average high temperature are January and December (60°F).

  • Average low temperature in December: 37°F

Months with the highest average low temperature are July and August (54°F).
Coldest months (with the lowest average low temperature) are January and December (37°F).

Average rainfall in December - Gilroy, CA
  • Average rainfall in December: 3.7"

The wettest month (with the highest rainfall) is January (4.7").
Driest months (with the lowest rainfall) are June, July and August (0.1").

Average rainfall days in December - Gilroy, CA
  • Average rainfall days in December: 6 days

The month with the highest number of rainy days is January (7 days).
Months with the lowest number of rainy days are June, July and August (0 days).

Average daylight in December - Gilroy, CA
  • Average daylight in December: 9.7h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).