Chesterton
Indiana, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Chesterton, IN

The first month of the winter, December, is still a cold month in Chesterton, Indiana, with temperature in the range of an average low of 21.2°F (-6°C) and an average high of 35.4°F (1.9°C).

Temperature

In Chesterton, the average high-temperature drops, from a chilly 49.5°F (9.7°C) in November, to a cold 35.4°F (1.9°C). The average low-temperature, in December, is 21.2°F (-6°C).

Rainfall

In Chesterton, in December, it is raining for 13 days, with typically 3.1" (80mm) of accumulated precipitation. In Chesterton, during the entire year, the rain falls for 130 days and collects up to 39.4" (999.8mm) of precipitation.

Snowfall

Months with snowfall in Chesterton are January through April, October through December.

Ocean temperature

In Chesterton, Indiana, the average water temperature is 41°F (5°C). Swimming in 41°F (5°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The month with the shortest days is December, with an average of 9.2h of daylight.

Sunshine

December has the least sunshine of the year, with an average of 3h of sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for the average person.
In December, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Chesterton?

In Chesterton, in December, the average high-temperature is 35.4°F (1.9°C), and the average low-temperature is 21.2°F (-6°C).

How many days does it rain in December in Chesterton?

In Chesterton, in December, it is raining for 13 days, with typically 3.1" (80mm) of accumulated precipitation.

How much does it snow in Chesterton in December?

Throughout December, in Chesterton, 9.1" (231mm) of snow is accumulated.

What is the ocean temperature in December in Chesterton?

In Chesterton, in December, the average water temperature is 41°F (5°C). Swimming in 41°F (5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Chesterton?

December has the shortest days of the year, with an average of 9.2h of daylight.

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

The average length of the day in December in Chesterton, Indiana, is 9.2h.

What is the month with the least sunshine in Chesterton?

The month with the least sunshine in Chesterton, Indiana, is December, with an average of 3h of sunshine.

How long on average sun shines in December in Chesterton?

In December, the average sunshine in Chesterton, Indiana, is 3h.

When is the lowest UV index in Chesterton?

Months with the lowest UV index in Chesterton are January and December, with an average maximum UV index of 1.

What is the UV index reading in December in Chesterton?

The average daily maximum UV index in December in Chesterton is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Chesterton, IN
  • Average high temperature in December: 35.4°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in December: 21.2°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).

Average rainfall in December - Chesterton, IN
  • Average rainfall in December: 3.2"

The wettest month (with the highest rainfall) is June (4.2").
The driest month (with the lowest rainfall) is February (1.7").

Average rainfall days in December - Chesterton, IN
  • Average rainfall days in December: 13 days

Months with the highest number of rainy days are March, April and December (13 days).
Months with the lowest number of rainy days are August, September and October (9 days).

Average snowfall in December - Chesterton, IN
  • Average snowfall in December: 9.1"

The month with the highest snowfall is January (11.8").
Months with the lowest snowfall are May, June, July, August and September (0").

Average sea temperature in December - Chesterton, IN
  • Average sea temperature in December: 41°F

The best month for swimming (with the highest average sea temperature) is August (70°F).
Coldest months (with the lowest average sea temperature) are February, March and April (37°F).

Average daylight in December / Average sunshine in December - Chesterton, IN
  • Average daylight in December: 9.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 3h

Months with most sunshine are June and July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 3h).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).