December weather forecast
Glencoe, CA

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Weather in December

December, the first month of the winter in Glencoe, is also a frosty month, with an average temperature ranging between min 32.9°F (0.5°C) and max 48.6°F (9.2°C).

Temperature

December is the coldest month, with an average high-temperature of 48.6°F (9.2°C) and an average low-temperature of 32.9°F (0.5°C).

Humidity

The average relative humidity in December is 67%.

Rainfall

In Glencoe, in December, during 9.4 rainfall days, 4.96" (126mm) of precipitation is typically accumulated. Throughout the year, there are 78.6 rainfall days, and 31.18" (792mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Glencoe, in December, snow falls for 5.1 days, with typically accumulated 7.99" (203mm) of snow. In Glencoe, during the entire year, snow falls for 27.8 days and aggregates up to 71.02" (1804mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 30min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:52 pm PST.

Sunshine

With an average of 5.9h of sunshine, December has the least sunshine of the year.

UV index

The months with the lowest UV index are February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 2 during December translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Glencoe's coldest temperatures are experienced in December, with average high temperatures of 48.6°F (9.2°C) and lows of 32.9°F (0.5°C).

What are December temperatures in Glencoe?

In December, the average high-temperature and low-temperature are 48.6°F (9.2°C) and 32.9°F (0.5°C) respectively.

What is the average humidity in December in Glencoe?

In Glencoe, the average relative humidity in December is 67%.

How many days does it rain in December?

In Glencoe, in December, during 9.4 rainfall days, 4.96" (126mm) of precipitation is typically accumulated.

How many days does it snow in December?

In Glencoe, in December, during 5.1 snowfall days, 7.99" (203mm) 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 9h and 30min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 33min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:01 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:52 pm PST.

What is the month with the least sunshine?

With an average of 5.9h of sunshine, December has the least sunshine of the year.

How many hours of sunshine does Glencoe have in December?

In Glencoe, the average sunshine duration in December is 5.9h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability 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
Glencoe, CA

Average temperature in December - Glencoe, CA
  • Average high temperature in December: 48.6°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is December (48.6°F).

  • Average low temperature in December: 32.9°F

The month with the highest average low temperature is July (57.4°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).

Average pressure in December
Glencoe, CA

Average pressure in December - Glencoe, CA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
Glencoe, CA

Average wind speed in December - Glencoe, CA
  • Average wind speed in December: 5.3mph

The windiest month (with the highest average wind speed) is February (6.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in December
Glencoe, CA

Average humidity in December - Glencoe, CA
  • Average humidity in December: 67%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and August (37%).

Average rainfall in December
Glencoe, CA

Average rainfall in December - Glencoe, CA
  • Average rainfall in December: 4.96"

The wettest month (with the highest rainfall) is March (6.14").
The driest months (with the least rainfall) are July and August (0.08").

Average rainfall days in December
Glencoe, CA

Average rainfall days in December - Glencoe, CA
  • Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (1.8 days).

Average snowfall in December
Glencoe, CA

Average snowfall in December - Glencoe, CA
  • Average snowfall in December: 7.99"

The month with the highest snowfall is March (18.98").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Glencoe, CA

Average snowfall days in December - Glencoe, CA
  • Average snowfall days in December: 5.1 days

The month with the highest number of snowfall days is March (6.4 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in December /
Average sunshine in December
Glencoe, CA

Average daylight in December / Average sunshine in December - Glencoe, CA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in December
Glencoe, CA

Average sunshine days in December - Glencoe, CA
  • Average sunshine days in December: 19 days

The month with the most sunshine days is August (27.3 days).
The month with the least sunshine days is March (14.3 days).

Average UV index in December
Glencoe, CA

Average UV index in December - Glencoe, CA
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 2).

Average cloud cover in December
Glencoe, CA

Average cloud cover in December - Glencoe, CA
  • Average cloud cover in December: 32

The month with the most cloud cover is March (Cloud cover 37).
The months with the least cloud cover are July and August (Cloud cover 5).

Average visibility in December
Glencoe, CA

Average visibility in December - Glencoe, CA
  • Average visibility in December: 6mi

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

Glencoe, California, USA

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