December weather forecast
Heidelberg, MS

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Weather in December

December, the first month of the winter in Heidelberg, is still a mild month, with an average temperature fluctuating between 43°F (6.1°C) and 58.8°F (14.9°C).

Temperature

As December arrives, Heidelberg's weather displays a minor decrease in high-temperatures, transitioning from November's enjoyable 66°F (18.9°C) to a still refreshing 58.8°F (14.9°C). Nighttime temperature lowers to an average of 43°F (6.1°C) in December.

Humidity

With an average relative humidity of 82%, December is the most humid month in Heidelberg.

Rainfall

In December, the rain falls for 12.2 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. In Heidelberg, during the entire year, the rain falls for 157.7 days and collects up to 23.94" (608mm) of precipitation.

Snowfall

January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 1.8 snowfall days, and 0.71" (18mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 10h and 6min of daylight.
On the first day of the month, sunrise is at 6:38 am and sunset at 4:51 pm. On the last day of December, sunrise is at 6:56 am and sunset at 5:02 pm CST.

Sunshine

February and December, with an average of 4.9h of sunshine, are months with the least sunshine.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: A maximum high daily UV index of 3 during December translates into the following directions:
Exercise prevention - Warding off sunburn is urged. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.

Frequently asked questions

What are the temperatures in December?

The high-temperature, in December, in Heidelberg, records 58.8°F (14.9°C), while the low-temperature is 43°F (6.1°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 102.2°F (39°C).

What is the most humid month?

December is the most humid month in Heidelberg, with an average relative humidity of 82%.

What is the average humidity in December?

In December, the average relative humidity is 82%.

How many days does it rain in December?

In Heidelberg, in December, during 12.2 rainfall days, 2.36" (60mm) of precipitation is typically accumulated.

When does it start to snow?

December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.2" (5mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 10h and 6min of daylight.

How many hours of daylight does Heidelberg have in December?

In Heidelberg, the average day length in December is 10h and 7min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:38 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 5:02 pm CST.

What are the months with the least sunshine?

The months with the least sunshine are February and December, with an average of 4.9h of sunshine.

How long on average sun shines in December?

In Heidelberg, the average sunshine duration in December is 4.9h.

What are the months with the lowest UV index?

The months with the lowest UV index are January and December, with an average maximum UV index of 3.

What is the UV index reading in December?

The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Heidelberg, MS

Average temperature in December - Heidelberg, MS
  • Average high temperature in December: 58.8°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (55.8°F).

  • Average low temperature in December: 43°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).

Average pressure in December
Heidelberg, MS

Average pressure in December - Heidelberg, MS
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in December
Heidelberg, MS

Average wind speed in December - Heidelberg, MS
  • Average wind speed in December: 6.7mph

The windiest months (with the highest average wind speed) are January, February and April (7mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

Average humidity in December
Heidelberg, MS

Average humidity in December - Heidelberg, MS
  • Average humidity in December: 82%

The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Heidelberg, MS

Average rainfall in December - Heidelberg, MS
  • Average rainfall in December: 2.36"

The wettest month (with the highest rainfall) is July (3.19").
The driest month (with the least rainfall) is November (1.1").

Average rainfall days in December
Heidelberg, MS

Average rainfall days in December - Heidelberg, MS
  • Average rainfall days in December: 12.2 days

The month with the highest number of rainy days is July (21.7 days).
The month with the least rainy days is November (7.9 days).

Average snowfall in December
Heidelberg, MS

Average snowfall in December - Heidelberg, MS
  • Average snowfall in December: 0.2"

The month with the highest snowfall is January (0.28").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Heidelberg, MS

Average snowfall days in December - Heidelberg, MS
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Heidelberg, MS

Average daylight in December / Average sunshine in December - Heidelberg, MS
  • Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in December: 4h and 5min

The months with the most sunshine are June, July and August (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days in December
Heidelberg, MS

Average sunshine days in December - Heidelberg, MS
  • Average sunshine days in December: 17 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (7.8 days).

Average UV index in December
Heidelberg, MS

Average UV index in December - Heidelberg, MS
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

Average cloud cover in December
Heidelberg, MS

Average cloud cover in December - Heidelberg, MS
  • Average cloud cover in December: 48

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 30).

Average visibility in December
Heidelberg, MS

Average visibility in December - Heidelberg, MS
  • Average visibility in December: 5mi

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

Heidelberg, Mississippi, USA

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