December weather forecast
Cheonan, South Korea

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Weather in December

Concluding the year, December brings winter back to Cheonan in its full glory. Deeper into the winter narrative than November, it exhibits an indisputable temperature plunge. Snowfall intensifies, reaching up to 35mm (1.38"), orchestrating a wintry rendevouz for the city. Muted sunshine and decreasing daylight hours construct a relatively somber environment reflective of the year's end. Despite its cold exterior, December experiences a less damp climate, rounding off a dynamic climatic journey for Cheonan.

Temperature

December's onset is marked by a clear temperature decrease, falling from a cool 11.4°C (52.5°F) in November to a wintry 3°C (37.4°F). Cheonan's nights in December experience an average temperature drop to a freezing cold -3.1°C (26.4°F).

Humidity

In December, the average relative humidity is 67%.

Rainfall

In December, the rain falls for 8.5 days. Throughout December, 23mm (0.91") of precipitation is accumulated. In Cheonan, during the entire year, the rain falls for 121.9 days and collects up to 694mm (27.32") of precipitation.

Snowfall

January through April, November and December are months with snowfall in Cheonan, South Korea. The month with the most snowfall is December, when snow falls for 7 days and typically aggregates up to 35mm (1.38") of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 42min of daylight.
On the first day of the month, sunrise is at 07:25 and sunset at 17:15. On the last day of December, sunrise is at 07:44 and sunset at 17:25 KST.

Sunshine

The months with the least sunshine are January and December, with an average of 5.6h of sunshine.

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 minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 2 in December translates into this advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
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Frequently asked questions

How cold is it in Cheonan in December?

Cheonan in December has an average high-temperature of 3°C (37.4°F) and an average low-temperature of -3.1°C (26.4°F). In August, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, is evaluated at 36°C (96.8°F).

What is the average humidity in December in Cheonan?

The average relative humidity in December in Cheonan, South Korea, is 67%.

How many days does it rain in December in Cheonan?

In Cheonan, South Korea, in December, during 8.5 rainfall days, 23mm (0.91") of precipitation is typically accumulated.

What is the snowiest month in Cheonan?

December is the month with the most snowfall in Cheonan, South Korea. Snow falls for 7 days and accumulates 35mm (1.38") of snow.

How much does it snow in Cheonan in December?

In Cheonan, in December, during 7 snowfall days, 35mm (1.38") of snow is typically accumulated.

What is the month with the shortest days in Cheonan?

The month with the shortest days in Cheonan is December, with an average of 9h and 42min of daylight.

How many hours of daylight does Cheonan have in December?

In December, the average day length in Cheonan is 9h and 41min.

When are sunrise and sunset in December in Cheonan?

On the first day of December in Cheonan, sunrise is at 07:25 and sunset at 17:15. On the last day of the month, sunrise is at 07:44 and sunset at 17:25 KST.

What are the months with the least sunshine in Cheonan?

January and December, with an average of 5.6h of sunshine, are months with the least sunshine in Cheonan.

How long on average sun shines in December in Cheonan?

In Cheonan, South Korea, the average sunshine duration in December is 5.6h.

What are the months with the lowest UV index in Cheonan?

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

How high is the UV index in December in Cheonan?

In Cheonan, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in December
Cheonan, South Korea

Average temperature in December - Cheonan, South Korea
  • Average high temperature in December: 3°C

The warmest month (with the highest average high temperature) is August (28.9°C).
The month with the lowest average high temperature is January (1.1°C).

  • Average low temperature in December: -3.1°C

The month with the highest average low temperature is August (20.7°C).
The coldest month (with the lowest average low temperature) is January (-5.7°C).

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Average pressure in December
Cheonan, South Korea

Average pressure in December - Cheonan, South Korea
  • Average pressure in December: 1024.4mbar

The month with the highest atmospheric pressure is January (1025.4mbar).
The month with the lowest atmospheric pressure is July (1007.1mbar).

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Average wind speed in December
Cheonan, South Korea

Average wind speed in December - Cheonan, South Korea
  • Average wind speed in December: 9.4km/h

The windiest month (with the highest average wind speed) is March (10.6km/h).
The calmest month (with the lowest average wind speed) is September (6.7km/h).

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Average humidity in December
Cheonan, South Korea

Average humidity in December - Cheonan, South Korea
  • Average humidity in December: 67%

The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are February and March (62%).

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Average rainfall in December
Cheonan, South Korea

Average rainfall in December - Cheonan, South Korea
  • Average rainfall in December: 23mm

The wettest month (with the highest rainfall) is July (167mm).
The driest month (with the least rainfall) is January (16mm).

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Average rainfall days in December
Cheonan, South Korea

Average rainfall days in December - Cheonan, South Korea
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is July (22.2 days).
The month with the least rainy days is February (4.7 days).

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Average snowfall in December
Cheonan, South Korea

Average snowfall in December - Cheonan, South Korea
  • Average snowfall in December: 35mm

The month with the highest snowfall is December (35mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in December
Cheonan, South Korea

Average snowfall days in December - Cheonan, South Korea
  • Average snowfall days in December: 7 days

The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Cheonan, South Korea

Average daylight in December / Average sunshine in December - Cheonan, South Korea
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 5h and 4min

The months with the most sunshine are May and June (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).

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Average sunshine days in December
Cheonan, South Korea

Average sunshine days in December - Cheonan, South Korea
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is October (24.5 days).
The month with the least sunshine days is July (7 days).

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Average UV index in December
Cheonan, South Korea

Average UV index in December - Cheonan, South Korea
  • Average UV index in December: 2

The months with the highest UV index are 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
Cheonan, South Korea

Average cloud cover in December - Cheonan, South Korea
  • Average cloud cover in December: 39

The month with the most cloud cover is July (Cloud cover 54).
The month with the least cloud cover is October (Cloud cover 25).

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Average visibility in December
Cheonan, South Korea

Average visibility in December - Cheonan, South Korea
  • Average visibility in December: 9km

The months with the highest visibility are February, March, October and November (10km).
The month with the lowest visibility is July (7km).

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Cheonan, South Korea

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