December weather forecast
Ames, IA

Weather in December

December, the first month of the winter, in Ames, is also a wintry month, with 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 cold 32.5°F (0.3°C). The average low-temperature, in Ames, Iowa, is 21.4°F (-5.9°C).

Humidity

The average relative humidity in December is 80%.

Rainfall

In December, in Ames, the rain falls for 4.9 days. Throughout December, 1.34" (34mm) of precipitation is accumulated. Throughout the year, in Ames, there are 130.6 rainfall days, and 27.48" (698mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Ames are January through May, October through December. In Ames, during December, snow falls for 8.4 days and regularly aggregates up to 2.64" (67mm) of snow. In Ames, during the entire year, snow falls for 36.2 days, and aggregates up to 15.43" (392mm) of snow.

Daylight

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

Sunshine

In December, the average sunshine is 4.5h.

UV index

The average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in December interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged 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. 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 Ames?

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

How many days does it rain in December in Ames?

In Ames, Iowa, in December, during 4.9 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

How much does it snow in Ames in December?

In Ames, Iowa, 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?

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

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

The average length of the day in December is 9.2h.

How long on average sun shines in December in Ames?

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

What is the UV index reading in December in Ames?

The average daily maximum UV index in December in Ames is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.

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"

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

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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").
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).
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: 9.2h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in December: 4.5h

The month with the most sunshine is July (Average sunshine: 10.1h).
The month with the least sunshine is January (Average sunshine: 3.9h).

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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

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

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

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