December weather forecast
Montesano, WA

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Weather in December

December, the first month of the winter in Montesano, is also a frosty month, with an average temperature fluctuating between 34.7°F (1.5°C) and 43.9°F (6.6°C).

Temperature

During the coldest month, December, temperatures average a high of 43.9°F (6.6°C) and a low of 34.7°F (1.5°C).

Humidity

The months with the highest humidity are November and December, with an average relative humidity of 90%.

Rainfall

The wettest months are January and December, with an average 5.04" (128mm) of rainfall.

Snowfall

Months with snowfall are January through March, November and December. In Montesano, in December, during 0.6 snowfall days, 0.08" (2mm) of snow is typically accumulated. In Montesano, during the entire year, snow falls for 5.1 days and aggregates up to 2.32" (59mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 36min of daylight.
On the first day of December, sunrise is at 7:40 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 4:35 pm PST.

Sunshine

The months with the least sunshine are January and December, with an average of 3.3h of sunshine.

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 estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

In Montesano, the average lowest temperatures are observed in December, with a high of 43.9°F (6.6°C) and a low of 34.7°F (1.5°C).

Is December cold?

In Montesano, 43.9°F (6.6°C) is the average high-temperature and 34.7°F (1.5°C) is the average low-temperature during December.

What is the most humid month?

The months with the highest humidity are November and December, with an average relative humidity of 90%.

What is the average humidity in December?

In Montesano, the average relative humidity in December is 90%.

What is the wettest month in Montesano?

The wettest months are January and December, with an average 5.04" (128mm) of rainfall.

How much does it rain in December?

In Montesano, in December, during 18.7 rainfall days, 5.04" (128mm) of precipitation is typically accumulated.

How much does it snow in December?

In Montesano, in December, snow falls for 0.6 days, with typically accumulated 0.08" (2mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

In December, the average day length is 8h and 35min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:40 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:59 am and sunset at 4:35 pm PST.

What is the month with the least sunshine?

January and December, with an average of 3.3h of sunshine, are months with the least sunshine in Montesano.

How many hours of sunshine does Montesano have in December?

The average sunshine duration in December is 3.3h.

When is the lowest UV index?

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

How high is the UV index in December?

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

Average temperature in December - Montesano, WA
  • Average high temperature in December: 43.9°F

The warmest month (with the highest average high temperature) is August (74.8°F).
The month with the lowest average high temperature is December (43.9°F).

  • Average low temperature in December: 34.7°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is February (34.5°F).

Average pressure in December
Montesano, WA

Average pressure in December - Montesano, WA
  • Average pressure in December: 30.06"Hg

The months with the highest atmospheric pressure are January and July (30.07"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).

Average wind speed in December
Montesano, WA

Average wind speed in December - Montesano, WA
  • Average wind speed in December: 5.1mph

The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).

Average humidity in December
Montesano, WA

Average humidity in December - Montesano, WA
  • Average humidity in December: 90%

The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is July (76%).

Average rainfall in December
Montesano, WA

Average rainfall in December - Montesano, WA
  • Average rainfall in December: 5.04"

The wettest months (with the highest rainfall) are January and December (5.04").
The driest month (with the least rainfall) is July (0.35").

Average rainfall days in December
Montesano, WA

Average rainfall days in December - Montesano, WA
  • Average rainfall days in December: 18.7 days

The month with the highest number of rainy days is March (19.2 days).
The month with the least rainy days is August (5.9 days).

Average snowfall in December
Montesano, WA

Average snowfall in December - Montesano, WA
  • Average snowfall in December: 0.08"

The month with the highest snowfall is February (1.02").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Montesano, WA

Average snowfall days in December - Montesano, WA
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (2 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
Montesano, WA

Average daylight in December / Average sunshine in December - Montesano, 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 36min).

  • Average sunshine in December: 3h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 3h and 18min).

Average sunshine days in December
Montesano, WA

Average sunshine days in December - Montesano, WA
  • Average sunshine days in December: 11.1 days

The months with the most sunshine days are July and August (22.1 days).
The month with the least sunshine days is March (10 days).

Average UV index in December
Montesano, WA

Average UV index in December - Montesano, 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
Montesano, WA

Average cloud cover in December - Montesano, WA
  • Average cloud cover in December: 67

The months with the most cloud cover are January and December (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 42).

Average visibility in December
Montesano, WA

Average visibility in December - Montesano, WA
  • Average visibility in December: 4mi

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

Montesano, Washington, USA

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