December weather forecast
Ames, IA

Weather in December

December, the first month of the winter in Ames, is also a wintry month, with an average temperature fluctuating between 21.4°F (-5.9°C) and 32.5°F (0.3°C).

Temperature

In December, the average high-temperature drops from a frosty 45.9°F (7.7°C) in November to a wintry 32.5°F (0.3°C). The average low-temperature, in December, is 21.4°F (-5.9°C).

Humidity

The average relative humidity in December in Ames, Iowa, is 80%.

Rainfall

In Ames, Iowa, it is raining for 4.9 days, with typically 1.34" (34mm) of accumulated precipitation. In Ames, during the entire year, the rain falls for 130.6 days and collects up to 27.48" (698mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Ames. In Ames, in December, during 8.4 snowfall days, 2.64" (67mm) of snow is typically accumulated. Throughout the year, in Ames, Iowa, there are 36.2 snowfall days, and 15.43" (392mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Ames, with an average of 9h and 11min of daylight.
On the first day of December, sunrise is at 7:22 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 4:52 pm CST.

Sunshine

The average sunshine in December in Ames, Iowa, is 4.5h.

UV index

In Ames, Iowa, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 2 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Ames?

In Ames, in December, the average high-temperature is 32.5°F (0.3°C), and the average low-temperature is 21.4°F (-5.9°C). in July, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is estimated at 87.8°F (31°C).

What is the average humidity in December in Ames?

In Ames, Iowa, the average relative humidity in December is 80%.

How much does it rain in Ames in December?

In Ames, Iowa, during December, the rain falls for 4.9 days and regularly aggregates up to 1.34" (34mm) of precipitation.

How many days does it snow in December in Ames?

In Ames, in December, during 8.4 snowfall days, 2.64" (67mm) of snow is typically accumulated.

What is the month with the shortest days in Ames?

The month with the shortest days is December, with an average of 9h and 11min of daylight.

What is the average length of the day in December in Ames?

In December, the average day length in Ames is 9h and 11min.

When are sunrise and sunset in December in Ames?

On the first day of December in Ames, Iowa, sunrise is at 7:22 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 4:52 pm CST.

How long on average sun shines in December in Ames?

In Ames, the average sunshine duration in December is 4.5h.

What is the UV index reading in December in Ames?

In December, the average daily maximum UV index in Ames, Iowa, is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.
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
Ames, IA

Average temperature in December - Ames, IA
  • Average high temperature in December: 32.5°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (26.6°F).

  • Average low temperature in December: 21.4°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 (13.5°F).

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Average pressure in December
Ames, IA

Average pressure in December - Ames, IA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in December
Ames, IA

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

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in December
Ames, IA

Average humidity in December - Ames, IA
  • Average humidity in December: 80%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Ames, IA

Average rainfall in December - Ames, IA
  • Average rainfall in December: 1.34"

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is January (0.94").

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Average rainfall days in December
Ames, IA

Average rainfall days in December - Ames, IA
  • Average rainfall days in December: 4.9 days

The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in December
Ames, IA

Average snowfall in December - Ames, IA
  • Average snowfall in December: 2.64"

The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Ames, IA

Average snowfall days in December - Ames, IA
  • Average snowfall days in December: 8.4 days

The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Ames, IA
  • Average daylight in December: 9h and 11min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

  • Average sunshine in December: 4h and 30min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in December
Ames, IA

Average sunshine days in December - Ames, IA
  • Average sunshine days in December: 17.8 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (10.4 days).

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Average UV index in December
Ames, IA

Average UV index in December - Ames, IA
  • Average UV index in December: 2

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

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Average cloud cover in December
Ames, IA

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

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 31).

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Average visibility in December
Ames, IA

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

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

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