December weather forecast
Blue Grass, IA

Weather in December

December, the first month of the winter, in Blue Grass, is also a wintry month, with average temperature varying between 34°F (1.1°C) and 23.2°F (-4.9°C).

Temperature

In Blue Grass, Iowa, the average high-temperature decreases, from a frosty 46.4°F (8°C) in November, to a cold 34°F (1.1°C). In December, in Blue Grass, the average low-temperature is 23.2°F (-4.9°C).

Humidity

The average relative humidity is 81%.

Rainfall

In Blue Grass, it is raining for 7 days, with typically 1.46" (37mm) of accumulated precipitation. Throughout the year, there are 151.1 rainfall days, and 31.14" (791mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In Blue Grass, snow falls for 8.6 days, with typically accumulated 2.72" (69mm) of snow. In Blue Grass, Iowa, during the entire year, snow falls for 39.2 days, and aggregates up to 16.54" (420mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9.2h of daylight.

Sunshine

In December, the average sunshine in Blue Grass is 4.4h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 1 in December transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in December in Blue Grass?

In Blue Grass, Iowa, the average relative humidity in December is 81%.

How much does it rain in Blue Grass in December?

In Blue Grass, Iowa, in December, during 7 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

How many days does it snow in December in Blue Grass?

In Blue Grass, in December, snow falls for 8.6 days, with typically accumulated 2.72" (69mm) of snow.

What is the month with the shortest days in Blue Grass?

With an average of 9.2h of daylight, December has the shortest days of the year in Blue Grass, Iowa.

How many hours of daylight does Blue Grass have in December?

In December, the average length of the day in Blue Grass, Iowa, is 9.2h.

How many hours of sunshine does Blue Grass have in December?

In December, the average sunshine in Blue Grass, Iowa, is 4.4h.

What are the months with the lowest UV index in Blue Grass?

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

What is the UV index reading in December in Blue Grass?

The average daily maximum UV index in December is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in December
Blue Grass, IA

Average temperature in December - Blue Grass, IA
  • Average high temperature in December: 34°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 (27.7°F).

  • Average low temperature in December: 23.2°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

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Average pressure in December
Blue Grass, IA

Average pressure in December - Blue Grass, IA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed in December
Blue Grass, IA

Average wind speed in December - Blue Grass, IA
  • Average wind speed in December: 9.8mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

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Average humidity in December
Blue Grass, IA

Average humidity in December - Blue Grass, IA
  • Average humidity in December: 81%

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

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Average rainfall in December
Blue Grass, IA

Average rainfall in December - Blue Grass, IA
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is February (1.38").

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Average rainfall days in December
Blue Grass, IA

Average rainfall days in December - Blue Grass, IA
  • Average rainfall days in December: 7 days

The month with the highest number of rainy days is May (19.6 days).
The month with the least rainy days is January (4.6 days).

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Average snowfall in December
Blue Grass, IA

Average snowfall in December - Blue Grass, IA
  • Average snowfall in December: 2.72"

The month with the highest snowfall is January (4.88").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Blue Grass, IA

Average snowfall days in December - Blue Grass, IA
  • Average snowfall days in December: 8.6 days

The month with the highest number of snowfall days is January (11.6 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Blue Grass, IA

Average daylight in December / Average sunshine in December - Blue Grass, IA
  • Average daylight in December: 9.2h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.4h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is January (Average sunshine: 4h).

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Average sunshine days in December
Blue Grass, IA

Average sunshine days in December - Blue Grass, IA
  • Average sunshine days in December: 17.4 days

The month with the most sunshine days is December (17.4 days).
Months with the least sunshine days are May and June (8.3 days).

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Average UV index in December
Blue Grass, IA

Average UV index in December - Blue Grass, IA
  • Average UV index in December: 1

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

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Average cloud cover in December
Blue Grass, IA

Average cloud cover in December - Blue Grass, IA
  • Average cloud cover in December: 54

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in December
Blue Grass, IA

Average visibility in December - Blue Grass, IA
  • Average visibility in December: 6mi

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

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