December weather forecast
Gresham, OR

The fall colors in the trees and the fields around a beautiful house in Gresham, Oregon
The fall colors in the trees and the fields around a beautiful house in Gresham, Oregon

Weather in December

The first month of the winter, December, is still a chilly month in Gresham, Oregon, with an average temperature ranging between min 33.8°F (1°C) and max 43.7°F (6.5°C).

Temperature

With an average high-temperature of 43.7°F (6.5°C) and an average low-temperature of 33.8°F (1°C), December is the coldest month.

Humidity

In December, the average relative humidity is 82%.

Rainfall

December is the month with the most rainfall in Gresham. Rain falls for 17.6 days and accumulates 5.31" (135mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Gresham, during December, snow falls for 1.2 days and regularly aggregates up to 0.67" (17mm) of snow. Throughout the year, in Gresham, there are 8.2 snowfall days, and 5.87" (149mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Gresham, with an average of 8h and 47min of daylight.
On the first day of December in Gresham, sunrise is at 7:29 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:35 pm PST.

Sunshine

The average sunshine in December in Gresham is 4.3h.

UV index

The months with the lowest UV index in Gresham, Oregon, are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Gresham?

December is the coldest month in Gresham, with an average high-temperature of 43.7°F (6.5°C) and an average low-temperature of 33.8°F (1°C).

What is the temperature in December in Gresham?

In December, in Gresham, Oregon, the average high-temperature is 43.7°F (6.5°C), and the average low-temperature is 33.8°F (1°C).

What is the average humidity in December in Gresham?

In December, the average relative humidity in Gresham, Oregon, is 82%.

What is the wettest month in Gresham?

December is the month with the most rainfall in Gresham, Oregon. Rain falls for 17.6 days and accumulates 5.31" (135mm) of precipitation.

How much does it rain in Gresham in December?

In Gresham, Oregon, during December, the rain falls for 17.6 days and regularly aggregates up to 5.31" (135mm) of precipitation.

How many days does it snow in December in Gresham?

In Gresham, Oregon, in December, snow falls for 1.2 days, with typically accumulated 0.67" (17mm) of snow.

What is the month with the shortest days in Gresham?

With an average of 8h and 47min of daylight, December has the shortest days of the year in Gresham.

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

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

When is the sunrise / sunset in December in Gresham?

On the first day of December, sunrise is at 7:29 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:49 am and sunset at 4:35 pm PST.

How many hours of sunshine does Gresham have in December?

In Gresham, Oregon, the average sunshine duration in December is 4.3h.

What are the months with the lowest UV index in Gresham?

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

How high is the UV index in December in Gresham?

The average daily maximum UV index in December is 2. A UV Index 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
Gresham, OR

Average temperature in December - Gresham, OR
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is December (43.7°F).

  • Average low temperature in December: 33.8°F

The month with the highest average low temperature is August (53.4°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).

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Average pressure in December
Gresham, OR

Average pressure in December - Gresham, OR
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

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Average wind speed in December
Gresham, OR

Average wind speed in December - Gresham, OR
  • Average wind speed in December: 6.3mph

The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).

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Average humidity in December
Gresham, OR

Average humidity in December - Gresham, OR
  • Average humidity in December: 82%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is August (64%).

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Average rainfall in December
Gresham, OR

Average rainfall in December - Gresham, OR
  • Average rainfall in December: 5.31"

The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.31").

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Average rainfall days in December
Gresham, OR

Average rainfall days in December - Gresham, OR
  • Average rainfall days in December: 17.6 days

The month with the highest number of rainy days is March (19.3 days).
The month with the least rainy days is August (4.4 days).

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Average snowfall in December
Gresham, OR

Average snowfall in December - Gresham, OR
  • Average snowfall in December: 0.67"

The month with the highest snowfall is March (1.73").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Gresham, OR

Average snowfall days in December - Gresham, OR
  • Average snowfall days in December: 1.2 days

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Gresham, OR

Average daylight in December / Average sunshine in December - Gresham, OR
  • Average daylight in December: 8h and 47min

The month with the longest days is June (Average daylight: 15h and 37min).
The month with the shortest days is December (Average daylight: 8h and 47min).

  • Average sunshine in December: 4h and 18min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and February (Average sunshine: 4h and 12min).

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Average sunshine days in December
Gresham, OR

Average sunshine days in December - Gresham, OR
  • Average sunshine days in December: 11.5 days

The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (9.7 days).

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Average UV index in December
Gresham, OR

Average UV index in December - Gresham, 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).

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Average cloud cover in December
Gresham, OR

Average cloud cover in December - Gresham, OR
  • Average cloud cover in December: 55

The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in December
Gresham, OR

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

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

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