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

December weather forecast and climate
Hayward, CA

The landscape of the famed Verdant Hills in Hayward, California
The landscape of the famed Verdant Hills in Hayward, California
December, the first month of the winter, in Hayward, is also a moderate month, with average temperature fluctuating between 59°F (15°C) and 41°F (5°C).

Temperature

In Hayward, the average high-temperature slightly decreases, from an enjoyable 64.4°F (18°C) in November, to a mild 59°F (15°C). In December, the average low-temperature is 41°F (5°C).

Rainfall

During December, Hayward regularly aggregates up to 3.8" (97.5mm) of precipitation. Throughout the year, 26.5" (672mm) of rain is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.6h of daylight.

Sunshine

The month with the least sunshine in Hayward, California, is December, with an average of 5h of sunshine.

What is the temperature in December in Hayward?

In Hayward, California, in December, the average high-temperature is 59°F (15°C), and the average low-temperature is 41°F (5°C).

How much does it rain in Hayward in December?

During December, Hayward regularly aggregates up to 3.8" (97.5mm) of precipitation.

What is the month with the shortest days in Hayward?

With an average of 9.6h of daylight, December has the shortest days of the year.

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

In December, the average length of the day in Hayward is 9.6h.

What is the month with the least sunshine in Hayward?

December has the least sunshine of the year, with an average of 5h of sunshine.

How long on average sun shines in December in Hayward?

In December, the average sunshine in Hayward is 5h.
Average temperature in December - Hayward, CA
  • Average high temperature in December: 59°F

Warmest months (with the highest average high temperature) are July, August and September (75.2°F).
The month with the lowest average high temperature is January (57.2°F).

  • Average low temperature in December: 41°F

Months with the highest average low temperature are August and September (55.4°F).
The coldest month (with the lowest average low temperature) is December (41°F).

Average rainfall in December - Hayward, CA
  • Average rainfall in December: 3.8"

The wettest month (with the highest rainfall) is January (5.2").
Driest months (with the lowest rainfall) are July and August (0.1").

Average daylight in December / Average sunshine in December - Hayward, CA
  • Average daylight in December: 9.6h

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

  • Average sunshine in December: 5h

The month with most sunshine is June (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 5h).