December weather forecast
Pomeroy, WA

Share

Weather in December

The first month of the winter, December, is also a wintry month in Pomeroy, Washington, with an average temperature varying between 25.9°F (-3.4°C) and 36.3°F (2.4°C).

Temperature

Pomeroy's coldest temperatures are experienced in December, with average high temperatures of 36.3°F (2.4°C) and lows of 25.9°F (-3.4°C).

Humidity

In December, the average relative humidity is 80%.

Rainfall

The months with the most rainfall are March and December, with an average 1.69" (43mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Pomeroy, during December, snow falls for 8 days and regularly aggregates up to 3.46" (88mm) of snow. In Pomeroy, during the entire year, snow falls for 32.7 days and aggregates up to 16.77" (426mm) of snow.

Daylight

December has the shortest days of the year, with an average of 8h and 42min of daylight.
On the first day of the month, sunrise is at 7:14 am and sunset at 4:05 pm. On the last day of December, sunrise is at 7:34 am and sunset at 4:13 pm PST.

Sunshine

In December, the average sunshine is 5.3h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 2 during December translates into the following guidance:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

Frequently asked questions

What time of the year is the coldest?

December is the coldest month, with the temperature often reaching an average high of 36.3°F (2.4°C) and an average low of 25.9°F (-3.4°C).

How cold is it in December?

In December, in Pomeroy, the average high-temperature is 36.3°F (2.4°C), and the average low-temperature is 25.9°F (-3.4°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in July is appraised at 82.4°F (28°C).

What is the average humidity in December?

In December, the average relative humidity is 80%.

What is the wettest month?

The months with the most rainfall are March and December, with an average 1.69" (43mm) of precipitation.

How much does it rain in December?

In December, the rain falls for 10.6 days. Throughout December, 1.69" (43mm) of precipitation is accumulated.

How much does it snow in December?

In Pomeroy, during December, snow falls for 8 days and regularly aggregates up to 3.46" (88mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 42min of daylight.

What is the average length of the day in December in Pomeroy?

The average day length in December is 8h and 40min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:14 am and sunset at 4:05 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:13 pm PST.

How many hours of sunshine does Pomeroy have in December?

The average sunshine duration in December is 5.3h.

When is the lowest UV index?

January, February, November and 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 Pomeroy?

The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe 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
Pomeroy, WA

Average temperature in December - Pomeroy, WA
  • Average high temperature in December: 36.3°F

The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (36.3°F).

  • Average low temperature in December: 25.9°F

The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is December (25.9°F).

Average pressure in December
Pomeroy, WA

Average pressure in December - Pomeroy, WA
  • Average pressure in December: 30.17"Hg

The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).

Average wind speed in December
Pomeroy, WA

Average wind speed in December - Pomeroy, WA
  • Average wind speed in December: 6.7mph

The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest months (with the lowest average wind speed) are August and September (6mph).

Average humidity in December
Pomeroy, WA

Average humidity in December - Pomeroy, WA
  • Average humidity in December: 80%

The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (37%).

Average rainfall in December
Pomeroy, WA

Average rainfall in December - Pomeroy, WA
  • Average rainfall in December: 1.69"

The wettest months (with the highest rainfall) are March and December (1.69").
The driest month (with the least rainfall) is July (0.31").

Average rainfall days in December
Pomeroy, WA

Average rainfall days in December - Pomeroy, WA
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is March (15.7 days).
The month with the least rainy days is July (4.8 days).

Average snowfall in December
Pomeroy, WA

Average snowfall in December - Pomeroy, WA
  • Average snowfall in December: 3.46"

The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July and August (0").

Average snowfall days in December
Pomeroy, WA

Average snowfall days in December - Pomeroy, WA
  • Average snowfall days in December: 8 days

The months with the highest number of snowfall days are February and December (8 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in December / Average sunshine in December - Pomeroy, WA
  • Average daylight in December: 8h and 4min

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 42min).

  • Average sunshine in December: 5h and 2min

The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).

Average sunshine days in December
Pomeroy, WA

Average sunshine days in December - Pomeroy, WA
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (11.9 days).

Average UV index in December
Pomeroy, WA

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

Average cloud cover in December
Pomeroy, WA

Average cloud cover in December - Pomeroy, WA
  • Average cloud cover in December: 45

The months with the most cloud cover are January and February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 11).

Average visibility in December
Pomeroy, WA

Average visibility in December - Pomeroy, WA
  • Average visibility in December: 6mi

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

Pomeroy, Washington, USA

Weather forecast for your location

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