December weather forecast
Harrington, WA

Share

Weather in December

December, the first month of the winter in Harrington, is still a freezing cold month, with temperature in the range of an average high of 31.5°F (-0.3°C) and an average low of 21.9°F (-5.6°C).

Temperature

December is the coldest month, with the temperature often reaching an average high of 31.5°F (-0.3°C) and an average low of 21.9°F (-5.6°C).

Humidity

In Harrington, the average relative humidity in December is 86%.

Rainfall

In Harrington, Washington, in December, it is raining for 9.1 days, with typically 1.89" (48mm) of accumulated precipitation. In Harrington, Washington, during the entire year, the rain falls for 127.9 days and collects up to 15.71" (399mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Harrington, in December, during 15.9 snowfall days, 9.02" (229mm) of snow is typically accumulated. Throughout the year, in Harrington, Washington, there are 65.1 snowfall days, and 37.36" (949mm) of snow is accumulated.

Daylight

With an average of 8h and 30min of daylight, December has the shortest days of the year in Harrington.
On the first day of the month, sunrise is at 7:20 am and sunset at 4:03 pm. On the last day of December, sunrise is at 7:40 am and sunset at 4:12 pm PST.

Sunshine

December has the least sunshine of the year in Harrington, with an average of 4.1h of sunshine.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Harrington. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 2 in December translates into this advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months in Harrington?

The coldest temperatures in Harrington, Washington, occur during December, when averages reach a peak of 31.5°F (-0.3°C) and a low of 21.9°F (-5.6°C).

How cold is it in Harrington in December?

The average high-temperature, in December, in Harrington, is 31.5°F (-0.3°C), while the average low-temperature is 21.9°F (-5.6°C).

What is the average humidity in December in Harrington?

In Harrington, Washington, the average relative humidity in December is 86%.

How much does it rain in Harrington in December?

In Harrington, during December, the rain falls for 9.1 days and regularly aggregates up to 1.89" (48mm) of precipitation.

How many days does it snow in December in Harrington?

In Harrington, in December, snow falls for 15.9 days, with typically accumulated 9.02" (229mm) of snow.

What is the month with the shortest days in Harrington?

The month with the shortest days in Harrington, Washington, is December, with an average of 8h and 30min of daylight.

How many hours of daylight does Harrington have in December?

In December, the average day length is 8h and 31min.

When are sunrise and sunset in December in Harrington?

In December, on the first day of the month, sunrise is at 7:20 am and sunset at 4:03 pm. On the last day of the month, in Harrington, Washington, sunrise is at 7:40 am and sunset at 4:12 pm PST.

What is the month with the least sunshine in Harrington?

December has the least sunshine of the year in Harrington, with an average of 4.1h of sunshine.

How many hours of sunshine does Harrington have in December?

The average sunshine duration in December in Harrington is 4.1h.

What are the months with the lowest UV index in Harrington?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December in Harrington?

In Harrington, Washington, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Harrington, WA

Average temperature in December - Harrington, WA
  • Average high temperature in December: 31.5°F

The warmest months (with the highest average high temperature) are July and August (83.3°F).
The month with the lowest average high temperature is December (31.5°F).

  • Average low temperature in December: 21.9°F

The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

Average pressure in December
Harrington, WA

Average pressure in December - Harrington, WA
  • Average pressure in December: 30.16"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).

Average wind speed in December
Harrington, WA

Average wind speed in December - Harrington, WA
  • Average wind speed in December: 6.6mph

The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in December
Harrington, WA

Average humidity in December - Harrington, WA
  • Average humidity in December: 86%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (37%).

Average rainfall in December
Harrington, WA

Average rainfall in December - Harrington, WA
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is March (1.97").
The driest months (with the least rainfall) are July and August (0.31").

Average rainfall days in December
Harrington, WA

Average rainfall days in December - Harrington, WA
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (5.2 days).

Average snowfall in December
Harrington, WA

Average snowfall in December - Harrington, WA
  • Average snowfall in December: 9.02"

The month with the highest snowfall is January (10").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Harrington, WA

Average snowfall days in December - Harrington, WA
  • Average snowfall days in December: 15.9 days

The month with the highest number of snowfall days is December (15.9 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in December /
Average sunshine in December
Harrington, WA

Average daylight in December / Average sunshine in December - Harrington, WA
  • Average daylight in December: 8h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

Average sunshine days in December
Harrington, WA

Average sunshine days in December - Harrington, WA
  • Average sunshine days in December: 12.8 days

The month with the most sunshine days is July (23.7 days).
The month with the least sunshine days is March (10.2 days).

Average UV index in December
Harrington, WA

Average UV index in December - Harrington, WA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

Average cloud cover in December
Harrington, WA

Average cloud cover in December - Harrington, WA
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 12).

Average visibility in December
Harrington, WA

Average visibility in December - Harrington, WA
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

Harrington, Washington, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location