December weather forecast
Millersburg, IA

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Weather in December

December, the first month of the winter in Millersburg, is also a wintry month, with an average temperature ranging between max 33.6°F (0.9°C) and min 22.6°F (-5.2°C).

Temperature

The arrival of December corresponds with a reduction in the average high-temperature, down from November's chilly 46.6°F (8.1°C) to a cold 33.6°F (0.9°C). Millersburg experiences a mean temperature of 22.6°F (-5.2°C) during December nights.

Humidity

The average relative humidity in December is 81%.

Rainfall

In Millersburg, in December, it is raining for 6.4 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 142 rainfall days, and 29.09" (739mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In Millersburg, in December, during 6.7 snowfall days, 2.17" (55mm) of snow is typically accumulated. In Millersburg, during the entire year, snow falls for 35.1 days and aggregates up to 15.43" (392mm) of snow.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:39 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:48 pm CST.

Sunshine

In December, the average sunshine is 4.5h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: In December, an average UV index of 1 transforms into the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

The average high-temperature, in December, in Millersburg, is 33.6°F (0.9°C), while the average low-temperature is 22.6°F (-5.2°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, in August is computed to be 86°F (30°C).

What is the average humidity in December?

In December, the average relative humidity in Millersburg is 81%.

How much does it rain in December?

In December, the rain falls for 6.4 days. Throughout December, 1.42" (36mm) of precipitation is accumulated.

How much does it snow in December?

In December, it is snowing for 6.7 days. Throughout December, 2.17" (55mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

What is the average length of the day in December?

The average day length in December is 9h and 13min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:16 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:48 pm CST.

How many hours of sunshine does Millersburg have in December?

In December, the average sunshine duration is 4.5h.

When is the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December in Millersburg is 1. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
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
Millersburg, IA

Average temperature in December - Millersburg, IA
  • Average high temperature in December: 33.6°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.1°F).

  • Average low temperature in December: 22.6°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

Average pressure in December
Millersburg, IA

Average pressure in December - Millersburg, IA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed in December
Millersburg, IA

Average wind speed in December - Millersburg, IA
  • Average wind speed in December: 10.1mph

The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity in December
Millersburg, IA

Average humidity in December - Millersburg, IA
  • Average humidity in December: 81%

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

Average rainfall in December
Millersburg, IA

Average rainfall in December - Millersburg, IA
  • Average rainfall in December: 1.42"

The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is January (1.18").

Average rainfall days in December
Millersburg, IA

Average rainfall days in December - Millersburg, IA
  • Average rainfall days in December: 6.4 days

The months with the highest number of rainy days are May and June (18.5 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in December
Millersburg, IA

Average snowfall in December - Millersburg, IA
  • Average snowfall in December: 2.17"

The month with the highest snowfall is January (4.8").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Millersburg, IA

Average snowfall days in December - Millersburg, IA
  • Average snowfall days in December: 6.7 days

The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Millersburg, IA

Average daylight in December / Average sunshine in December - Millersburg, IA
  • Average daylight in December: 9h and 1min

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 12min).

  • Average sunshine in December: 4h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in December
Millersburg, IA

Average sunshine days in December - Millersburg, IA
  • Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.1 days).

Average UV index in December
Millersburg, IA

Average UV index in December - Millersburg, IA
  • 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
Millersburg, IA

Average cloud cover in December - Millersburg, IA
  • Average cloud cover in December: 53

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).

Average visibility in December
Millersburg, IA

Average visibility in December - Millersburg, IA
  • Average visibility in December: 6mi

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

Millersburg, Iowa, USA

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