December weather forecast
Grants Pass, OR

Colorful balloons rise from the scenic grounds in a field near Grant Pass, Oregon
Colorful balloons rise from the scenic grounds in a field near Grant Pass, Oregon

Weather in December

The first month of the winter, December, is still a chilly month in Grants Pass, Oregon, with an average temperature varying between 46°F (7.8°C) and 31.5°F (-0.3°C).

Temperature

With an average high-temperature of 46°F (7.8°C) and an average low-temperature of 31.5°F (-0.3°C), December is the coldest month.

Humidity

In Grants Pass, the average relative humidity in December is 84%.

Rainfall

The month with the most rainfall is December, when the rain falls for 15.9 days and typically aggregates up to 4.02" (102mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Grants Pass. In Grants Pass, during December, snow falls for 1.1 days and regularly aggregates up to 0.51" (13mm) of snow. Throughout the year, in Grants Pass, there are 7.9 snowfall days, and 5.12" (130mm) of snow is accumulated.

Daylight

With an average of 9h and 8min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:23 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 4:50 pm PST.

Sunshine

The month with the least sunshine in Grants Pass is December, with an average of 4.7h 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 estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 2 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Grants Pass?

With an average high-temperature of 46°F (7.8°C) and an average low-temperature of 31.5°F (-0.3°C), December is the coldest month in Grants Pass.

What is the temperature in December in Grants Pass?

The average high-temperature, in December, in Grants Pass, is 46°F (7.8°C), while the average low-temperature is 31.5°F (-0.3°C). in August, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in December in Grants Pass?

The average relative humidity in December in Grants Pass, Oregon, is 84%.

What is the rainiest month in Grants Pass?

December is the month with the most rainfall in Grants Pass. Rain falls for 15.9 days and accumulates 4.02" (102mm) of precipitation.

How much does it rain in Grants Pass in December?

In Grants Pass, in December, it is raining for 15.9 days, with typically 4.02" (102mm) of accumulated precipitation.

How much does it snow in Grants Pass in December?

In Grants Pass, Oregon, in December, during 1.1 snowfall days, 0.51" (13mm) of snow is typically accumulated.

What is the month with the shortest days in Grants Pass?

The month with the shortest days in Grants Pass, Oregon, is December, with an average of 9h and 8min of daylight.

What is the average length of the day in December in Grants Pass?

In December, the average day length in Grants Pass is 9h and 8min.

What time are sunrise and sunset in December in Grants Pass?

In December, on the first day of the month, sunrise is at 7:23 am and sunset at 4:41 pm. On the last day of the month, in Grants Pass, sunrise is at 7:42 am and sunset at 4:50 pm PST.

What is the month with the least sunshine in Grants Pass?

With an average of 4.7h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Grants Pass have in December?

In December, the average sunshine duration in Grants Pass is 4.7h.

What are the months with the lowest UV index in Grants Pass?

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

How high is the UV index in December in Grants Pass?

In December, the average daily maximum UV index in Grants Pass, Oregon, is 2. A UV Index reading of 2, and below, represents 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
Grants Pass, OR

Average temperature in December - Grants Pass, OR
  • Average high temperature in December: 46°F

The warmest month (with the highest average high temperature) is August (84.7°F).
The month with the lowest average high temperature is December (46°F).

  • Average low temperature in December: 31.5°F

The month with the highest average low temperature is August (49.1°F).
The coldest month (with the lowest average low temperature) is December (31.5°F).

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Average pressure in December
Grants Pass, OR

Average pressure in December - Grants Pass, OR
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).

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Average wind speed in December
Grants Pass, OR

Average wind speed in December - Grants Pass, OR
  • Average wind speed in December: 3.7mph

The windiest month (with the highest average wind speed) is March (4mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).

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Average humidity in December
Grants Pass, OR

Average humidity in December - Grants Pass, OR
  • Average humidity in December: 84%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (63%).

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Average rainfall in December
Grants Pass, OR

Average rainfall in December - Grants Pass, OR
  • Average rainfall in December: 4.02"

The wettest month (with the highest rainfall) is December (4.02").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in December
Grants Pass, OR

Average rainfall days in December - Grants Pass, OR
  • Average rainfall days in December: 15.9 days

The month with the highest number of rainy days is March (18.7 days).
The month with the least rainy days is August (2.5 days).

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Average snowfall in December
Grants Pass, OR

Average snowfall in December - Grants Pass, OR
  • Average snowfall in December: 0.51"

The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Grants Pass, OR

Average snowfall days in December - Grants Pass, OR
  • Average snowfall days in December: 1.1 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
Grants Pass, OR

Average daylight in December / Average sunshine in December - Grants Pass, OR
  • Average daylight in December: 9h and 8min

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

  • Average sunshine in December: 4h and 42min

The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

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Average sunshine days in December
Grants Pass, OR

Average sunshine days in December - Grants Pass, OR
  • Average sunshine days in December: 13.5 days

The month with the most sunshine days is July (26.7 days).
The month with the least sunshine days is March (10.8 days).

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Average UV index in December
Grants Pass, OR

Average UV index in December - Grants Pass, 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
Grants Pass, OR

Average cloud cover in December - Grants Pass, OR
  • Average cloud cover in December: 52

The month with the most cloud cover is March (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in December
Grants Pass, OR

Average visibility in December - Grants Pass, OR
  • Average visibility in December: 4mi

The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

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