Hillsboro
Oregon, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Hillsboro, OR

The red tree colors of the fall along a road and amid trees in this tranquil neighborhood in Hillsboro, Oregon, and even better in the sun rays
The red tree colors of the fall along a road and amid trees in this tranquil neighborhood in Hillsboro, Oregon, and even better in the sun rays
The first month of the winter, December, is still a chilly month in Hillsboro, Oregon, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 46.4°F (8°C).

Temperature

In December, the average high-temperature slightly decreases, from a fresh 52.3°F (11.3°C) in November, to a frosty 46.4°F (8°C). In Hillsboro, in December, the average low-temperature is 34.2°F (1.2°C).

Rainfall

December is the month with the most rainfall. Rain falls for 20 days and accumulates 6.8" (172.7mm) of precipitation.

Daylight

December has the shortest days of the year in Hillsboro, Oregon, with an average of 8.8h of daylight.

What is the temperature in December in Hillsboro?

The average high-temperature, in December, in Hillsboro, Oregon, is 46.4°F (8°C), while the average low-temperature is 34.2°F (1.2°C).

How many days does it rain in December in Hillsboro?

In Hillsboro, in December, during 20 rainfall days, 6.8" (172.7mm) of precipitation is typically accumulated.

What is the wettest month in Hillsboro?

The month with the most rainfall in Hillsboro is December when the rain falls for 20 days and typically aggregates up to 6.8" (172.7mm) of precipitation.

What is the month with the shortest days in Hillsboro?

December has the shortest days of the year in Hillsboro, Oregon, with an average of 8.8h of daylight.

How many hours of daylight does Hillsboro have in December?

The average length of the day in December is 8.8h.
Average temperature in December - Hillsboro, OR
  • Average high temperature in December: 46.4°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (45°F).

  • Average low temperature in December: 34.2°F

The month with the highest average low temperature is July (51.9°F).
The coldest month (with the lowest average low temperature) is January (32.7°F).

Average rainfall in December - Hillsboro, OR
  • Average rainfall in December: 6.8"

The wettest month (with the highest rainfall) is December (6.8").
The driest month (with the lowest rainfall) is July (0.5").

Average rainfall days in December - Hillsboro, OR
  • Average rainfall days in December: 20 days

Months with the highest number of rainy days are January and December (20 days).
The month with the lowest number of rainy days is July (3 days).

Average daylight in December - Hillsboro, OR
  • Average daylight in December: 8.8h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).