Saint Helens
Oregon, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Saint Helens, OR

December, the first month of the winter, in Saint Helens, is also a frosty month, with average temperature fluctuating between 45.7°F (7.6°C) and 34°F (1.1°C).

Temperature

The coldest month is December, with an average high-temperature of 45.7°F (7.6°C) and an average low-temperature of 34°F (1.1°C).

Rainfall

December is the month with the most rainfall in Saint Helens. Rain falls for 18 days and accumulates 6.8" (171.5mm) of precipitation.

Snowfall

Months with snowfall in Saint Helens are January, February, November and December. Throughout December, 0.8" (20.3mm) of snow is accumulated. In Saint Helens, during the entire year, snow aggregates up to 2.9" (73.7mm).

Daylight

The month with the shortest days is December, with an average of 8.7h of daylight.

What is the coldest month in Saint Helens?

The coldest month in Saint Helens, Oregon, is December, with an average high-temperature of 45.7°F (7.6°C) and an average low-temperature of 34°F (1.1°C).

What is the temperature in December in Saint Helens?

The average high-temperature, in December, in Saint Helens, Oregon, is 45.7°F (7.6°C), while the average low-temperature is 34°F (1.1°C).

How many days does it rain in December in Saint Helens?

In December, the rain falls for 18 days. Throughout December, 6.8" (171.5mm) of precipitation is accumulated.

What is the rainiest month in Saint Helens?

December is the month with the most rainfall in Saint Helens, Oregon. Rain falls for 18 days and accumulates 6.8" (171.5mm) of precipitation.

How much does it snow in Saint Helens in December?

Throughout December, 0.8" (20.3mm) of snow is accumulated.

What is the month with the shortest days in Saint Helens?

The month with the shortest days is December, with an average of 8.7h of daylight.

How many hours of daylight does Saint Helens have in December?

The average length of the day in December in Saint Helens is 8.7h.
Average temperature in December - Saint Helens, OR
  • Average high temperature in December: 45.7°F

The warmest month (with the highest average high temperature) is August (82.4°F).
The month with the lowest average high temperature is December (45.7°F).

  • Average low temperature in December: 33.9°F

The month with the highest average low temperature is August (55.4°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).

Average rainfall in December - Saint Helens, 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 (0.7").

Average rainfall days in December - Saint Helens, OR
  • Average rainfall days in December: 18 days

Months with the highest number of rainy days are January, November and December (18 days).
The month with the lowest number of rainy days is July (4 days).

Average snowfall in December - Saint Helens, OR
  • Average snowfall in December: 0.8"

The month with the highest snowfall is January (1.3").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average daylight in December - Saint Helens, OR
  • Average daylight in December: 8.7h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).