December weather forecastLyle, WA

December

Weather in December

The first month of the winter, December, is still a cold month in Lyle, Washington, with an average temperature ranging between max 37°F (2.8°C) and min 27.1°F (-2.7°C).

Temperature

Lyle's temperature records reveal December as the coldest month, marked by average highs of 37°F (2.8°C) and lows of 27.1°F (-2.7°C).

Humidity

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

Rainfall

In December, the rain falls for 15.5 days. Throughout December, 2.87" (73mm) of precipitation is accumulated. In Lyle, during the entire year, the rain falls for 133.5 days and collects up to 16.93" (430mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Lyle, in December, snow falls for 4.4 days, with typically accumulated 2.99" (76mm) of snow. In Lyle, during the entire year, snow falls for 14.3 days and aggregates up to 11.06" (281mm) of snow.

Daylight

December has the shortest days of the year in Lyle, with an average of 8h and 48min of daylight.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:22 pm. On the last day of December, in Lyle, sunrise is at 7:45 am and sunset at 4:31 pm PST.

Sunshine

The average sunshine in December is 5h.

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 estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 2 during December translates into these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

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

Frequently asked questions

The coldest period in Lyle, Washington, tends to be December, when average temperatures fluctuate between a high of 37°F (2.8°C) and a low of 27.1°F (-2.7°C).

In Lyle, 37°F (2.8°C) is the average high-temperature and 27.1°F (-2.7°C) is the average low-temperature during December. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is appraised at 82.4°F (28°C).

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

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

In Lyle, in December, during 15.5 rainfall days, 2.87" (73mm) of precipitation is typically accumulated.

In Lyle, Washington, in December, snow falls for 4.4 days, with typically accumulated 2.99" (76mm) of snow.

The month with the shortest days in Lyle, Washington, is December, with an average of 8h and 48min of daylight.

In December, the average day length is 8h and 45min.

In December, on the first day of the month, sunrise is at 7:26 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:31 pm PST.

The average sunshine duration in December in Lyle is 5h.

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

The average daily maximum UV index in December in Lyle, Washington, is 2. A UV Index of 2, and less, symbolizes 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

45.5°F

37°F

38.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.7mph

5.3mph

5.5mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

12.1

11.6

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Lyle, WA

Average high temperature in December: 37°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (37°F).

Average low temperature in December: 27.1°F

The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).

Average pressure in December
Lyle, WA

Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).

Average wind speed in December
Lyle, WA

Average wind speed in December: 4.8mph

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).

Average humidity in December
Lyle, WA

Average humidity in December: 85%

The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).

Average rainfall in December
Lyle, WA

Average rainfall in December: 2.87"

The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").

Average rainfall days in December
Lyle, WA

Average rainfall days in December: 15.5 days

The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).

Average snowfall in December
Lyle, WA

Average snowfall in December: 2.99"

The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Lyle, WA

Average snowfall days in December: 4.4 days

The month with the highest number of snowfall days is December (4.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in December: 8h and 48min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).

Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in December
Lyle, WA

Average sunshine days in December: 12.1 days

The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).

Average UV index in December
Lyle, 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, November and December (UV index 2).

Average cloud cover in December
Lyle, WA

Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).

Average visibility in December
Lyle, 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 months with the lowest visibility are January, February and December (5mi).