December weather forecast
Thurmont, MD

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Weather in December

December's weather in Thurmont, Maryland is emblematic of a typical winter season. It records the lowest temperatures of the year, with an average minimum temperature of 30.2°F (-1°C). Snow becomes a frequent visitor, turning the landscapes into a winter wonderland. The shortened daylight hours, quietness, and serene beauty characterize December's weather. It paints a picture-perfect image of the year-end, setting the stage for the chilly January to follow.

Temperature

Thurmont's December weather features a light decline in high-temperatures, reducing from a cool 50.9°F (10.5°C) in November to a wintry 42.1°F (5.6°C). Thurmont, in December, experiences an average temperature of 30.2°F (-1°C) at night.

Humidity

In December, the average relative humidity in Thurmont is 79%.

Rainfall

In Thurmont, in December, it is raining for 10.8 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, there are 164.1 rainfall days, and 31.97" (812mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Thurmont, Maryland, are January through May, October through December. In Thurmont, in December, during 4.8 snowfall days, 2.13" (54mm) of snow is typically accumulated. In Thurmont, during the entire year, snow falls for 26.7 days and aggregates up to 14.13" (359mm) of snow.

Daylight

The month with the shortest days in Thurmont is December, with an average of 9h and 24min of daylight.
On the first day of December in Thurmont, Maryland, sunrise is at 7:11 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:55 pm EST.

Sunshine

In December, the average sunshine in Thurmont is 4.9h.

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 estimate of 2, and below, represents a minimal health vulnerability 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:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

How cold is December in Thurmont?

The high-temperature, in December, in Thurmont, is 42.1°F (5.6°C), while the low-temperature averages to 30.2°F (-1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, is computed to be 87.8°F (31°C).

What is the average humidity in December in Thurmont?

In December, the average relative humidity in Thurmont is 79%.

How many days does it rain in December in Thurmont?

In Thurmont, during December, the rain falls for 10.8 days and regularly aggregates up to 2.4" (61mm) of precipitation.

How much does it snow in Thurmont in December?

In Thurmont, Maryland, in December, during 4.8 snowfall days, 2.13" (54mm) of snow is typically accumulated.

What is the month with the shortest days in Thurmont?

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

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

In December, the average day length in Thurmont, Maryland, is 9h and 25min.

When is the sunrise / sunset in December in Thurmont?

On the first day of December in Thurmont, sunrise is at 7:11 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:55 pm EST.

How long on average sun shines in December in Thurmont?

In December, the average sunshine duration is 4.9h.

When is the lowest UV index in Thurmont?

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

What is the UV index intensity in December in Thurmont?

In Thurmont, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
50.9°F 10.5°C
42.1°F 5.6°C
36.7°F 2.6°C
Average low temperature
35.6°F 2°C
30.2°F -1°C
23.4°F -4.8°C
Average pressure
30.14" 766mmHg
30.11" 765mmHg
30.11" 765mmHg
Average wind speed
6.9mph 11.1km/h
7.3mph 11.7km/h
8mph 12.9km/h
Average max. wind speed
7.6mph 12.2km/h
8mph 12.9km/h
8.7mph 14km/h
Average wind speed gusts
11.6mph 18.7km/h
12mph 19.3km/h
12.7mph 20.4km/h
Average humidity
77%
79%
76%
Average rainfall
2.48" 63mm
2.4" 61mm
2.24" 57mm
Average rainfall days
10.2
10.8
8.7
Average snowfall
0.39" 10mm
2.13" 54mm
4.53" 115mm
Average snowfall days
1
4.8
8.3
Average daylight
10h 0min
9h 2min
9h 4min
Average sunshine
5h 4min
4h 5min
4h 4min
Average sunshine days
18.4
16.8
16.4
Average UV index
2
2
2
Average cloud cover
39%
48%
49%
Average visibility
6mi 9.7km
5mi 8km
5mi 8km

Average temperature in December
Thurmont, MD

Average temperature in December - Thurmont, MD
  • Average high temperature in December: 42.1°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in December
Thurmont, MD

Average pressure in December - Thurmont, MD
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in December
Thurmont, MD

Average wind speed in December - Thurmont, MD
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

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Average humidity in December
Thurmont, MD

Average humidity in December - Thurmont, MD
  • Average humidity in December: 79%

The month with the highest relative humidity is October (80%).
The months with the lowest relative humidity are April and July (75%).

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Average rainfall in December
Thurmont, MD

Average rainfall in December - Thurmont, MD
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is February (2.2").

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Average rainfall days in December
Thurmont, MD

Average rainfall days in December - Thurmont, MD
  • Average rainfall days in December: 10.8 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.7 days).

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Average snowfall in December
Thurmont, MD

Average snowfall in December - Thurmont, MD
  • Average snowfall in December: 2.13"

The month with the highest snowfall is January (4.53").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Thurmont, MD

Average snowfall days in December - Thurmont, MD
  • Average snowfall days in December: 4.8 days

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Thurmont, MD

Average daylight in December / Average sunshine in December - Thurmont, MD
  • 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: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Thurmont, MD

Average sunshine days in December - Thurmont, MD
  • Average sunshine days in December: 16.8 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (11.2 days).

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Average UV index in December
Thurmont, MD

Average UV index in December - Thurmont, MD
  • 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).

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Average cloud cover in December
Thurmont, MD

Average cloud cover in December - Thurmont, MD
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in December
Thurmont, MD

Average visibility in December - Thurmont, MD
  • Average visibility in December: 5mi

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

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Thurmont, Maryland, USA

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