December weather forecast
Redmond, WA

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Weather in December

Redmond, Washington, USA, in December is synonymous with winter's onset. The city greets December's chill with shortened hours of daylight, a mere 8.5 hours on average. Temperatures hover between a low of 34°F (1.1°C) and a high of 42.1°F (5.6°C), reinforcing the need for heavy winter wear. Albeit sparse, snowfall makes a comeback with 0.47" (12mm) recorded on average. As Redmond wraps up the year, December subtly prepares the city for January's deep winter experience, thereby completing the full weather cycle.

Temperature

Redmond's coldest weather arrives in December, when temperatures average a high of 42.1°F (5.6°C) and a low of 34°F (1.1°C).

Humidity

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

Rainfall

The month with the most rainfall is December, when the rain falls for 18.7 days and typically aggregates up to 4.37" (111mm) of precipitation.

Snowfall

Months with snowfall in Redmond are January through March, November and December. In Redmond, during December, snow falls for 1.3 days and regularly aggregates up to 0.47" (12mm) of snow. In Redmond, Washington, during the entire year, snow falls for 8.6 days and aggregates up to 4.53" (115mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 30min of daylight.
On the first day of the month, sunrise is at 7:36 am and sunset at 4:18 pm. On the last day of December, sunrise is at 7:56 am and sunset at 4:26 pm PST.

Sunshine

The month with the least sunshine in Redmond is December, with an average of 4.2h of 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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Updated: Jul 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

The month of December, characterized by an average high of 42.1°F (5.6°C) and a low of 34°F (1.1°C), is recognized as the coldest.

How cold is it in December?

In December, the average high-temperature and low-temperature are 42.1°F (5.6°C) and 34°F (1.1°C) respectively.

What is the most humid month?

January, February 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%.

What is the wettest month?

December is the month with the most rainfall. Rain falls for 18.7 days and accumulates 4.37" (111mm) of precipitation.

How many days does it rain in December?

In Redmond, in December, it is raining for 18.7 days, with typically 4.37" (111mm) of accumulated precipitation.

How many days does it snow in December?

In Redmond, in December, snow falls for 1.3 days, with typically accumulated 0.47" (12mm) of snow.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 8h and 30min of daylight.

What is the average length of the day in December?

In December, the average day length is 8h and 30min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:36 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:56 am and sunset at 4:26 pm PST.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 4.2h of sunshine.

How long on average sun shines in December?

In December, the average sunshine duration is 4.2h.

What are the months 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.

How high is the UV index in December?

In Redmond, 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 the Sun's UV radiation.
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
Redmond, WA

Average temperature in December - Redmond, WA
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is August (76.3°F).
The month with the lowest average high temperature is December (42.1°F).

  • Average low temperature in December: 34°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°F).

Average pressure in December
Redmond, WA

Average pressure in December - Redmond, WA
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed in December
Redmond, WA

Average wind speed in December - Redmond, WA
  • Average wind speed in December: 4.7mph

The windiest months (with the highest average wind speed) are January and March (5mph).
The calmest months (with the lowest average wind speed) are July and August (3.4mph).

Average humidity in December
Redmond, WA

Average humidity in December - Redmond, WA
  • Average humidity in December: 85%

The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is July (70%).

Average rainfall in December
Redmond, WA

Average rainfall in December - Redmond, WA
  • Average rainfall in December: 4.37"

The wettest month (with the highest rainfall) is December (4.37").
The driest month (with the least rainfall) is July (0.39").

Average rainfall days in December
Redmond, WA

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

The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (5.9 days).

Average snowfall in December
Redmond, WA

Average snowfall in December - Redmond, WA
  • Average snowfall in December: 0.47"

The month with the highest snowfall is February (2.05").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Redmond, WA

Average snowfall days in December - Redmond, WA
  • Average snowfall days in December: 1.3 days

The month with the highest number of snowfall days is February (3.2 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
Redmond, WA

Average daylight in December / Average sunshine in December - Redmond, WA
  • Average daylight in December: 8h and 3min

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).

Average sunshine days in December
Redmond, WA

Average sunshine days in December - Redmond, WA
  • Average sunshine days in December: 11 days

The month with the most sunshine days is August (23.3 days).
The month with the least sunshine days is February (8.8 days).

Average UV index in December
Redmond, WA

Average UV index in December - Redmond, WA
  • Average UV index in December: 2

The month with the highest UV index is 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
Redmond, WA

Average cloud cover in December - Redmond, WA
  • Average cloud cover in December: 56

The months with the most cloud cover are January and December (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 25).

Average visibility in December
Redmond, WA

Average visibility in December - Redmond, WA
  • Average visibility in December: 5mi

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

Redmond, Washington, USA

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