December weather forecast and climate
Hartwell, OH

The first month of the winter, December, is also a wintry month in Hartwell, Ohio, with average temperature varying between 41°F (5°C) and 30.2°F (-1°C).

Temperature

In December, the average high-temperature decreases, from a fresh 50.9°F (10.5°C) in November, to a cold 41°F (5°C). The average low-temperature, in Hartwell, Ohio, is 30.2°F (-1°C).

Humidity

December is the most humid month, with an average relative humidity of 81%.

Rainfall

In December, in Hartwell, the rain falls for 8.8 days. Throughout December, 0.98" (25mm) of precipitation is accumulated. Throughout the year, there are 121.7 rainfall days, and 12.4" (315mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Hartwell, Ohio, during December, snow falls for 5.5 days and regularly aggregates up to 0.67" (17mm) of snow. In Hartwell, during the entire year, snow falls for 23.7 days, and aggregates up to 3.98" (101mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9.5h of daylight.

Sunshine

The average sunshine in December is 4.2h.

UV index

December is the month with the lowest UV index in Hartwell, Ohio, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Hartwell?

The average high-temperature, in December, in Hartwell, is 41°F (5°C), while the average low-temperature is 30.2°F (-1°C).

What is the most humid month in Hartwell?

The most humid month in Hartwell, Ohio, is December, with an average relative humidity of 81%.

What is the average humidity in December in Hartwell?

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

How many days does it rain in December in Hartwell?

In Hartwell, in December, it is raining for 8.8 days, with typically 0.98" (25mm) of accumulated precipitation.

How many days does it snow in December in Hartwell?

In Hartwell, in December, during 5.5 snowfall days, 0.67" (17mm) of snow is typically accumulated.

What is the month with the shortest days in Hartwell?

With an average of 9.5h of daylight, December has the shortest days of the year.

How many hours of daylight does Hartwell have in December?

The average length of the day in December in Hartwell, Ohio, is 9.5h.

How long on average sun shines in December in Hartwell?

In Hartwell, the average sunshine in December is 4.2h.

What is the month with the lowest UV index in Hartwell?

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

How high is the UV index in December in Hartwell?

In Hartwell, Ohio, the average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to the UV radiation.
Average temperature in December - Hartwell, OH
  • Average high temperature in December: 5°C

The warmest month (with the highest average high temperature) is July (28.9°C).
The month with the lowest average high temperature is January (1.8°C).

  • Average low temperature in December: -1°C

The month with the highest average low temperature is July (19.1°C).
The coldest month (with the lowest average low temperature) is January (-4.9°C).

Average pressure in December - Hartwell, OH
  • Average pressure in December: 1020.2mbar

The month with the highest atmospheric pressure is January (1020.7mbar).
The month with the lowest atmospheric pressure is June (1013.9mbar).

Average wind speed in December - Hartwell, OH
  • Average wind speed in December: 13km/h

The windiest month (with the highest average wind speed) is January (14.3km/h).
The calmest months (with the lowest average wind speed) are July and August (8.4km/h).

Average humidity in December - Hartwell, OH
  • Average humidity in December: 81%

The month with the highest relative humidity is December (81%).
Months with the lowest relative humidity are August, September and October (74%).

Average rainfall in December - Hartwell, OH
  • Average rainfall in December: 25mm

The wettest month (with the highest rainfall) is May (36mm).
The driest month (with the least rainfall) is September (16mm).

Average rainfall days in December - Hartwell, OH
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is November (6.5 days).

Average snowfall in December - Hartwell, OH
  • Average snowfall in December: 17mm

The month with the highest snowfall is January (24mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in December - Hartwell, OH
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is February (6.1 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Hartwell, OH
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 4.2h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4h).

Average sunshine days in December - Hartwell, OH
  • Average sunshine days in December: 17.7 days

The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (14 days).

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

Months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December - Hartwell, OH
  • Average cloud cover in December: 57

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).

Average visibility in December - Hartwell, OH
  • Average visibility in December: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).