December weather forecast
Millheim, OH

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Weather in December

December, the first month of the winter in Millheim, is still a cold month, with an average temperature varying between 37.6°F (3.1°C) and 27.1°F (-2.7°C).

Temperature

The onset of December is marked by a decrease in temperature, transitioning from a frosty 47.8°F (8.8°C) in November to an icy 37.6°F (3.1°C). An average minimum temperature of 27.1°F (-2.7°C) marks the month of December.

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Millheim, in December, it is raining for 10.6 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, there are 175.8 rainfall days, and 32.32" (821mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 14.9 days. Throughout December, 5.43" (138mm) of snow is accumulated. In Millheim, Ohio, during the entire year, snow falls for 71.6 days and aggregates up to 27.09" (688mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 18min of daylight.
On the first day of the month, sunrise is at 7:31 am and sunset at 4:58 pm. On the last day of December, sunrise is at 7:50 am and sunset at 5:07 pm EST.

Sunshine

In Millheim, the average sunshine in December is 3.2h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 1 during December translates into the following guidance:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

Millheim in December has an average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 27.1°F (-2.7°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is estimated at 86°F (30°C).

What is the average humidity in December in Millheim?

In Millheim, the average relative humidity in December is 84%.

How much does it rain in Millheim in December?

In Millheim, Ohio, in December, during 10.6 rainfall days, 2.48" (63mm) of precipitation is typically accumulated.

How much does it snow in December?

In Millheim, during December, snow falls for 14.9 days and regularly aggregates up to 5.43" (138mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

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

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:31 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:50 am and sunset at 5:07 pm EST.

How long on average sun shines in December?

In Millheim, the average sunshine duration in December is 3.2h.

When is the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 1.

What is the UV index intensity in December?

In December, the average daily maximum UV index is 1. A UV Index 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
Millheim, OH

Average temperature in December - Millheim, OH
  • Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in December: 27.1°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (19°F).

Average pressure in December
Millheim, OH

Average pressure in December - Millheim, OH
  • Average pressure in December: 30.1"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Millheim, OH

Average wind speed in December - Millheim, OH
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is July (5.3mph).

Average humidity in December
Millheim, OH

Average humidity in December - Millheim, OH
  • Average humidity in December: 84%

The months with the highest relative humidity are January and February (86%).
The months with the lowest relative humidity are July and August (76%).

Average rainfall in December
Millheim, OH

Average rainfall in December - Millheim, OH
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is September (2.01").

Average rainfall days in December
Millheim, OH

Average rainfall days in December - Millheim, OH
  • Average rainfall days in December: 10.6 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.6 days).

Average snowfall in December
Millheim, OH

Average snowfall in December - Millheim, OH
  • Average snowfall in December: 5.43"

The month with the highest snowfall is January (6.85").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Millheim, OH

Average snowfall days in December - Millheim, OH
  • Average snowfall days in December: 14.9 days

The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Millheim, OH

Average daylight in December / Average sunshine in December - Millheim, OH
  • 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: 3h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).

Average sunshine days in December
Millheim, OH

Average sunshine days in December - Millheim, OH
  • Average sunshine days in December: 9.5 days

The month with the most sunshine days is November (13.1 days).
The month with the least sunshine days is February (7.6 days).

Average UV index in December
Millheim, OH

Average UV index in December - Millheim, OH
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Millheim, OH

Average cloud cover in December - Millheim, OH
  • Average cloud cover in December: 67

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in December
Millheim, OH

Average visibility in December - Millheim, OH
  • Average visibility in December: 5mi

The months with the highest visibility are April, June, July and August (6mi).
The months with the lowest visibility are January and February (4mi).

Millheim, Ohio, USA

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