December weather forecastThrall, WA

December

Weather in December

The first month of the winter, December, is also an icy month in Thrall, Washington, with an average temperature varying between 33.3°F (0.7°C) and 21.4°F (-5.9°C).

Temperature

The month of December, characterized by an average high of 33.3°F (0.7°C) and a low of 21.4°F (-5.9°C), is recognized as the coldest.

Humidity

In Thrall, Washington, the average relative humidity in December is 85%.

Rainfall

December is the month with the most rainfall in Thrall. Rain falls for 9.4 days and accumulates 1.3" (33mm) of precipitation.

Snowfall

January through April, September through December are months with snowfall. December is the month with the most snowfall in Thrall. Snow falls for 8.7 days and accumulates 4.65" (118mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 36min of daylight.
On the first day of December, sunrise is at 7:27 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:23 pm PST.

Sunshine

The months with the least sunshine in Thrall are January and December, with an average of 4.8h of sunshine.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Thrall. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.

Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

December is the coldest month in Thrall, Washington, with the temperature often reaching an average high of 33.3°F (0.7°C) and an average low of 21.4°F (-5.9°C).

December temperatures vary between a high-temperature of 33.3°F (0.7°C) and a low-temperature of 21.4°F (-5.9°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is estimated at 82.4°F (28°C).

In December, the average relative humidity is 85%.

The month with the most rainfall in Thrall, Washington, is December, when the rain falls for 9.4 days and typically aggregates up to 1.3" (33mm) of precipitation.

In Thrall, during December, the rain falls for 9.4 days and regularly aggregates up to 1.3" (33mm) of precipitation.

The month with the most snowfall in Thrall is December, when snow falls for 8.7 days and typically aggregates up to 4.65" (118mm) of snow.

In Thrall, during December, snow falls for 8.7 days and regularly aggregates up to 4.65" (118mm) of snow.

The month with the shortest days in Thrall, Washington, is December, with an average of 8h and 36min of daylight.

In Thrall, the average day length in December is 8h and 36min.

On the first day of December in Thrall, Washington, sunrise is at 7:27 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:23 pm PST.

January and December, with an average of 4.8h of sunshine, are months with the least sunshine in Thrall.

In Thrall, Washington, the average sunshine duration in December is 4.8h.

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

In Thrall, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

42.6°F

33.3°F

34.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.6mph

4.7mph

5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

14.9

15.3

15.2

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Thrall, WA

Average high temperature in December: 33.3°F

The warmest months (with the highest average high temperature) are July and August (82°F).
The month with the lowest average high temperature is December (33.3°F).

Average low temperature in December: 21.4°F

The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).

Average pressure in December
Thrall, WA

Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).

Average wind speed in December
Thrall, WA

Average wind speed in December: 4.2mph

The windiest month (with the highest average wind speed) is June (8.9mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).

Average humidity in December
Thrall, WA

Average humidity in December: 85%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (46%).

Average rainfall in December
Thrall, WA

Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in December
Thrall, WA

Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (2.8 days).

Average snowfall in December
Thrall, WA

Average snowfall in December: 4.65"

The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July and August (0").

Average snowfall days in December
Thrall, WA

Average snowfall days in December: 8.7 days

The months with the highest number of snowfall days are January and December (8.7 days).
The months with the least snowfall days are May, June, July and August (0 days).

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

Average daylight in December: 8h and 36min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

Average sunshine in December: 4h and 48min

The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).

Average sunshine days in December
Thrall, WA

Average sunshine days in December: 15.3 days

The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is February (13.5 days).

Average UV index in December
Thrall, WA

Average UV index in December: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in December
Thrall, WA

Average cloud cover in December: 47

The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 11).

Average visibility in December
Thrall, WA

Average visibility in December: 4mi

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