December weather forecast
Tigard, OR

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Weather in December

December ushers in the winter season in Tigard, showcasing a drastic shift from the mild November weather. It serves as the dawn of snowfall after an extended period, recording a slight 0.43" (11mm). Additionally, it bears the mantle for the year's lowest sunshine hours, limiting to just 4.2 hours a day. The city whitens under the gentle touch of first winter frost, and the Christmas decorations light up the misty nights. Despite short daylight, December holds a particular charm with its calm and serenity.

Temperature

December stands out as Tigard's coldest month, with an average high-temperature of 44.1°F (6.7°C) and a low-temperature of 34.5°F (1.4°C).

Humidity

The months with the highest humidity in Tigard are January, February and December, with an average relative humidity of 84%.

Rainfall

December is the month with the most rainfall. Rain falls for 18.9 days and accumulates 4.57" (116mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. In Tigard, in December, during 0.9 snowfall days, 0.43" (11mm) of snow is typically accumulated. In Tigard, during the entire year, snow falls for 6.5 days and aggregates up to 3.94" (100mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 48min of daylight.
On the first day of December, sunrise is at 7:31 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:38 pm PST.

Sunshine

The average sunshine in December is 4.2h.

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 unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 2 in December leads to these recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.

Frequently asked questions

What is the coldest time of year?

December, with its average high-temperature of 44.1°F (6.7°C) and an average low-temperature of 34.5°F (1.4°C), holds the record as the coldest month.

Is December cold?

In Tigard, in December, the average high-temperature is 44.1°F (6.7°C), and the average low-temperature is 34.5°F (1.4°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is estimated at 84.2°F (29°C).

What is the most humid month in Tigard?

The months with the highest humidity are January, February and December, with an average relative humidity of 84%.

What is the average humidity in December?

In December, the average relative humidity is 84%.

What is the rainiest month?

The month with the most rainfall is December, when the rain falls for 18.9 days and typically aggregates up to 4.57" (116mm) of precipitation.

How much does it rain in December?

In Tigard, during December, the rain falls for 18.9 days and regularly aggregates up to 4.57" (116mm) of precipitation.

How many days does it snow in December?

In Tigard, in December, during 0.9 snowfall days, 0.43" (11mm) of snow is typically accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In Tigard, the average day length in December is 8h and 47min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:31 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 4:38 pm PST.

How long on average sun shines in December?

In Tigard, the average sunshine duration in December is 4.2h.

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.

What is the UV index reading in December?

In Tigard, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to 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
Tigard, OR

Average temperature in December - Tigard, OR
  • Average high temperature in December: 44.1°F

The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).

  • Average low temperature in December: 34.5°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).

Average pressure in December
Tigard, OR

Average pressure in December - Tigard, OR
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).

Average wind speed in December
Tigard, OR

Average wind speed in December - Tigard, OR
  • Average wind speed in December: 5.2mph

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

Average humidity in December
Tigard, OR

Average humidity in December - Tigard, OR
  • Average humidity in December: 84%

The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (63%).

Average rainfall in December
Tigard, OR

Average rainfall in December - Tigard, OR
  • Average rainfall in December: 4.57"

The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").

Average rainfall days in December
Tigard, OR

Average rainfall days in December - Tigard, OR
  • Average rainfall days in December: 18.9 days

The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.8 days).

Average snowfall in December
Tigard, OR

Average snowfall in December - Tigard, OR
  • Average snowfall in December: 0.43"

The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Tigard, OR

Average snowfall days in December - Tigard, OR
  • Average snowfall days in December: 0.9 days

The month with the highest number of snowfall days is February (2.3 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
Tigard, OR

Average daylight in December / Average sunshine in December - Tigard, OR
  • Average daylight in December: 8h and 5min

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

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).

Average sunshine days in December
Tigard, OR

Average sunshine days in December - Tigard, OR
  • Average sunshine days in December: 10.4 days

The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.6 days).

Average UV index in December
Tigard, OR

Average UV index in December - Tigard, OR
  • 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
Tigard, OR

Average cloud cover in December - Tigard, OR
  • Average cloud cover in December: 56

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 22).

Average visibility in December
Tigard, OR

Average visibility in December - Tigard, OR
  • Average visibility in December: 5mi

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

Tigard, Oregon, USA

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