December weather forecast
Hepburn, IA

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Weather in December

December, the first month of the winter in Hepburn, is also an icy month, with an average temperature fluctuating between 22.8°F (-5.1°C) and 35.2°F (1.8°C).

Temperature

Hepburn's transition into December involves a shift in temperature, receding from a chilly 49.1°F (9.5°C) in November to a cold 35.2°F (1.8°C). In the month of December, the average low-temperature usually rests at a freezing cold 22.8°F (-5.1°C).

Humidity

In Hepburn, the average relative humidity in December is 78%.

Rainfall

In Hepburn, in December, it is raining for 4.3 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 114.9 rainfall days, and 18.39" (467mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. In Hepburn, during December, snow falls for 4.5 days and regularly aggregates up to 0.91" (23mm) of snow. In Hepburn, Iowa, during the entire year, snow falls for 25.2 days and aggregates up to 7.4" (188mm) 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 7:25 am and sunset at 4:52 pm. On the last day of December, sunrise is at 7:44 am and sunset at 5:02 pm CST.

Sunshine

In Hepburn, the average sunshine in December is 5h.

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 estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 2 during December morphs into the following directions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

Frequently asked questions

How cold is December?

In December, the average high-temperature and low-temperature are 35.2°F (1.8°C) and 22.8°F (-5.1°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is appraised at 89.6°F (32°C).

What is the average humidity in December?

The average relative humidity in December is 78%.

How much does it rain in December?

In December, the rain falls for 4.3 days. Throughout December, 0.59" (15mm) of precipitation is accumulated.

How much does it snow in December?

In Hepburn, Iowa, in December, snow falls for 4.5 days, with typically accumulated 0.91" (23mm) of snow.

What is the month with the shortest days in Hepburn?

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

How many hours of daylight does Hepburn have in December?

The average day length in December is 9h and 18min.

When is the sunrise / sunset in December?

In December, on the first day of the month, sunrise is at 7:25 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:44 am and sunset at 5:02 pm CST.

How many hours of sunshine does Hepburn have in December?

In Hepburn, the average sunshine duration in December is 5h.

When is the lowest UV index in Hepburn?

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

What is the UV index intensity in December?

In Hepburn, the average daily maximum UV index in December is 2. 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
Hepburn, IA

Average temperature in December - Hepburn, IA
  • Average high temperature in December: 35.2°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in December: 22.8°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).

Average pressure in December
Hepburn, IA

Average pressure in December - Hepburn, IA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in December
Hepburn, IA

Average wind speed in December - Hepburn, IA
  • Average wind speed in December: 9.5mph

The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

Average humidity in December
Hepburn, IA

Average humidity in December - Hepburn, IA
  • Average humidity in December: 78%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (69%).

Average rainfall in December
Hepburn, IA

Average rainfall in December - Hepburn, IA
  • Average rainfall in December: 0.59"

The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is February (0.43").

Average rainfall days in December
Hepburn, IA

Average rainfall days in December - Hepburn, IA
  • Average rainfall days in December: 4.3 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (3.4 days).

Average snowfall in December
Hepburn, IA

Average snowfall in December - Hepburn, IA
  • Average snowfall in December: 0.91"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Hepburn, IA

Average snowfall days in December - Hepburn, IA
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Hepburn, IA
  • 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: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in December
Hepburn, IA

Average sunshine days in December - Hepburn, IA
  • Average sunshine days in December: 22 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (12.3 days).

Average UV index in December
Hepburn, IA

Average UV index in December - Hepburn, IA
  • 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).

Average cloud cover in December
Hepburn, IA

Average cloud cover in December - Hepburn, IA
  • Average cloud cover in December: 45

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).

Average visibility in December
Hepburn, IA

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

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

Hepburn, Iowa, USA

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