December weather forecast
Montchanin, DE

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Weather in December

The first month of the winter, December, is still a chilly month in Montchanin, Delaware, with an average temperature varying between 43.7°F (6.5°C) and 32.7°F (0.4°C).

Temperature

The advent of December brings a subtle shift in temperature, with the average high moving from a cool 52.2°F (11.2°C) in November to a frosty 43.7°F (6.5°C). An average low-temperature of 32.7°F (0.4°C) is observed during the December nights.

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Montchanin, in December, during 11.5 rainfall days, 3.31" (84mm) of precipitation is typically accumulated. In Montchanin, during the entire year, the rain falls for 168.9 days and collects up to 35.55" (903mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Montchanin, during December, snow falls for 3.2 days and regularly aggregates up to 1.54" (39mm) of snow. Throughout the year, there are 21.9 snowfall days, and 12.05" (306mm) of snow is accumulated.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:47 pm EST.

Sunshine

In December, the average sunshine is 5h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 2 during December translates into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Jul 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

The average high-temperature, in December, in Montchanin, is 43.7°F (6.5°C), while the average low-temperature is 32.7°F (0.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 89.6°F (32°C).

What is the average humidity in December?

The average relative humidity in December is 77%.

How much does it rain in December?

In Montchanin, in December, during 11.5 rainfall days, 3.31" (84mm) of precipitation is typically accumulated.

How many days does it snow in December?

In December, it is snowing for 3.2 days. Throughout December, 1.54" (39mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year in Montchanin.

How many hours of daylight does Montchanin have in December?

In Montchanin, Delaware, the average day length in December is 9h and 25min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:47 pm EST.

How many hours of sunshine does Montchanin have in December?

The average sunshine duration in December is 5h.

What is the month with the lowest UV index?

The months with the lowest UV index in Montchanin are January, 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 estimate of 2, and below, represents a minimal health vulnerability 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
Montchanin, DE

Average temperature in December - Montchanin, DE
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

Average pressure in December
Montchanin, DE

Average pressure in December - Montchanin, DE
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Montchanin, DE

Average wind speed in December - Montchanin, DE
  • Average wind speed in December: 8mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in December
Montchanin, DE

Average humidity in December - Montchanin, DE
  • Average humidity in December: 77%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in December
Montchanin, DE

Average rainfall in December - Montchanin, DE
  • Average rainfall in December: 3.31"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").

Average rainfall days in December
Montchanin, DE

Average rainfall days in December - Montchanin, DE
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in December
Montchanin, DE

Average snowfall in December - Montchanin, DE
  • Average snowfall in December: 1.54"

The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Montchanin, DE

Average snowfall days in December - Montchanin, DE
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Montchanin, DE

Average daylight in December / Average sunshine in December - Montchanin, DE
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in December
Montchanin, DE

Average sunshine days in December - Montchanin, DE
  • Average sunshine days in December: 15.9 days

The month with the most sunshine days is November (18.6 days).
The months with the least sunshine days are May and July (9.8 days).

Average UV index in December
Montchanin, DE

Average UV index in December - Montchanin, DE
  • Average UV index in December: 2

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

Average cloud cover in December
Montchanin, DE

Average cloud cover in December - Montchanin, DE
  • Average cloud cover in December: 46

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in December
Montchanin, DE

Average visibility in December - Montchanin, DE
  • 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).

Montchanin, Delaware, USA

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