December weather forecast
Weallup Lake, WA

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Weather in December

December, the first month of the winter in Weallup Lake, is also a wintry month, with an average temperature fluctuating between 34.7°F (1.5°C) and 42.3°F (5.7°C).

Temperature

December, known for its average high temperature of 42.3°F (5.7°C) and an average low temperature of 34.7°F (1.5°C), is the coldest month.

Humidity

The months with the highest humidity are January and December, with an average relative humidity of 85%.

Rainfall

In Weallup Lake, in December, during 19.3 rainfall days, 3.82" (97mm) of precipitation is typically accumulated. Throughout the year, there are 179.1 rainfall days, and 29.57" (751mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In Weallup Lake, in December, snow falls for 1.5 days, with typically accumulated 0.51" (13mm) of snow. Throughout the year, there are 8.9 snowfall days, and 6.1" (155mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 8h and 24min of daylight.
On the first day of the month, sunrise is at 7:39 am and sunset at 4:17 pm. On the last day of December, sunrise is at 7:59 am and sunset at 4:25 pm PST.

Sunshine

January and December, with an average of 4.2h of sunshine, are months with the least sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, a regular UV index of 2 translates into these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. To guard against the harmful effects of the Sun, minimize exposure during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Updated: Jun 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?

In Weallup Lake, December records the average lowest temperatures, peaking at 42.3°F (5.7°C) and reaching a low of 34.7°F (1.5°C).

How cold does it get in December?

In Weallup Lake, in December, the average high-temperature is 42.3°F (5.7°C), and the average low-temperature is 34.7°F (1.5°C).

What are the most humid months?

January and December, with an average relative humidity of 85%, are most humid months.

What is the average humidity in December?

In December, the average relative humidity is 85%.

How much does it rain in December?

In Weallup Lake, in December, during 19.3 rainfall days, 3.82" (97mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Weallup Lake, Washington, in December, snow falls for 1.5 days, with typically accumulated 0.51" (13mm) of snow.

What is the month with the shortest days?

With an average of 8h and 24min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length in Weallup Lake is 8h and 26min.

When is the sunrise / sunset in December in Weallup Lake?

On the first day of December, sunrise is at 7:39 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 4:25 pm PST.

What are the months with the least sunshine?

The months with the least sunshine are January and December, with an average of 4.2h of sunshine.

How many hours of sunshine does Weallup Lake have in December?

The average sunshine duration in December is 4.2h.

What is the month with the lowest UV index?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk 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
Weallup Lake, WA

Average temperature in December - Weallup Lake, WA
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is December (42.3°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (34.7°F).

Average pressure in December
Weallup Lake, WA

Average pressure in December - Weallup Lake, WA
  • Average pressure in December: 30.08"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed in December
Weallup Lake, WA

Average wind speed in December - Weallup Lake, WA
  • Average wind speed in December: 5.4mph

The windiest months (with the highest average wind speed) are March and November (5.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

Average humidity in December
Weallup Lake, WA

Average humidity in December - Weallup Lake, WA
  • Average humidity in December: 85%

The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is July (73%).

Average rainfall in December
Weallup Lake, WA

Average rainfall in December - Weallup Lake, WA
  • Average rainfall in December: 3.82"

The wettest month (with the highest rainfall) is November (4.06").
The driest month (with the least rainfall) is July (0.47").

Average rainfall days in December
Weallup Lake, WA

Average rainfall days in December - Weallup Lake, WA
  • Average rainfall days in December: 19.3 days

The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.1 days).

Average snowfall in December
Weallup Lake, WA

Average snowfall in December - Weallup Lake, WA
  • Average snowfall in December: 0.51"

The month with the highest snowfall is February (2.68").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Weallup Lake, WA

Average snowfall days in December - Weallup Lake, WA
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Weallup Lake, WA

Average daylight in December / Average sunshine in December - Weallup Lake, WA
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 4h and 12min).

Average sunshine days in December
Weallup Lake, WA

Average sunshine days in December - Weallup Lake, WA
  • Average sunshine days in December: 10.1 days

The month with the most sunshine days is August (23.1 days).
The months with the least sunshine days are February and November (8.6 days).

Average UV index in December
Weallup Lake, WA

Average UV index in December - Weallup Lake, WA
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
Weallup Lake, WA

Average cloud cover in December - Weallup Lake, WA
  • Average cloud cover in December: 57

The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 26).

Average visibility in December
Weallup Lake, WA

Average visibility in December - Weallup Lake, WA
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).

Weallup Lake, Washington, USA

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