December weather forecast
Collegeville, IN

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Weather in December

December, the first month of the winter in Collegeville, is also an icy month, with an average temperature ranging between max 36.3°F (2.4°C) and min 26.8°F (-2.9°C).

Temperature

A moderate decline in the average high-temperature is seen during December, decreasing from a chilly 47.7°F (8.7°C) in November to an icy 36.3°F (2.4°C). The mean low-temperature during December nights is a freezing cold 26.8°F (-2.9°C).

Humidity

The average relative humidity in December is 81%.

Rainfall

In Collegeville, in December, during 8.1 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. Throughout the year, there are 151.2 rainfall days, and 22.64" (575mm) of precipitation is accumulated.

Snowfall

January through May, November and December are months with snowfall. In Collegeville, in December, snow falls for 8.5 days, with typically accumulated 1.97" (50mm) of snow. In Collegeville, during the entire year, snow falls for 40.3 days and aggregates up to 10.91" (277mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:21 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:30 pm CST.

Sunshine

In December, the average sunshine is 4.1h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.
Note: A daily maximum UV index of 1 in December translates into the following instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.

Frequently asked questions

How cold is December?

In December, in Collegeville, the average high-temperature is 36.3°F (2.4°C), and the average low-temperature is 26.8°F (-2.9°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in July is calculated to be 87.8°F (31°C).

What is the average humidity in December?

The average relative humidity in December is 81%.

How much does it rain in December?

In Collegeville, in December, it is raining for 8.1 days, with typically 1.3" (33mm) of accumulated precipitation.

How much does it snow in December?

In Collegeville, in December, during 8.5 snowfall days, 1.97" (50mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 18min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 17min.

When are sunrise and sunset in December in Collegeville?

In December, on the first day of the month, sunrise is at 6:54 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:30 pm CST.

How many hours of sunshine does Collegeville have in December?

In Collegeville, the average sunshine duration in December is 4.1h.

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 1.

How high is the UV index in December?

In December, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a low health risk 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
Collegeville, IN

Average temperature in December - Collegeville, IN
  • Average high temperature in December: 36.3°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in December: 26.8°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in December
Collegeville, IN

Average pressure in December - Collegeville, IN
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Collegeville, IN

Average wind speed in December - Collegeville, IN
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in December
Collegeville, IN

Average humidity in December - Collegeville, IN
  • Average humidity in December: 81%

The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Collegeville, IN

Average rainfall in December - Collegeville, IN
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (1.02").

Average rainfall days in December
Collegeville, IN

Average rainfall days in December - Collegeville, IN
  • Average rainfall days in December: 8.1 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in December
Collegeville, IN

Average snowfall in December - Collegeville, IN
  • Average snowfall in December: 1.97"

The month with the highest snowfall is February (3.23").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in December
Collegeville, IN

Average snowfall days in December - Collegeville, IN
  • Average snowfall days in December: 8.5 days

The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Collegeville, IN

Average daylight in December / Average sunshine in December - Collegeville, IN
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 1min

The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in December
Collegeville, IN

Average sunshine days in December - Collegeville, IN
  • Average sunshine days in December: 15.4 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.6 days).

Average UV index in December
Collegeville, IN

Average UV index in December - Collegeville, IN
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in December
Collegeville, IN

Average cloud cover in December - Collegeville, IN
  • Average cloud cover in December: 58

The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 35).

Average visibility in December
Collegeville, IN

Average visibility in December - Collegeville, IN
  • Average visibility in December: 6mi

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

Collegeville, Indiana, USA

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