December weather forecast and climate
Ames, IA

December, the first month of the winter, in Ames, is still a cold month, with average temperature ranging between max 32.5°F (0.3°C) and min 21.4°F (-5.9°C).

Temperature

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

Humidity

In December, the average relative humidity is 80%.

Rainfall

In Ames, in December, 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 December, in Ames, Iowa, it is snowing for 8.4 days. Throughout December, 2.64" (67mm) of snow is accumulated. Throughout the year, there are 36.2 snowfall days, and 15.43" (392mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9.2h of daylight.

Sunshine

In Ames, the average sunshine is 4.5h.

UV index

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Ames?

In December, in Ames, Iowa, the average high-temperature is 32.5°F (0.3°C), and the average low-temperature is 21.4°F (-5.9°C).

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, 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, Iowa, in December, snow falls for 8.4 days, with typically accumulated 2.64" (67mm) of snow.

What is the month with the shortest days in Ames?

The month with the shortest days in Ames is December, with an average of 9.2h of daylight.

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

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

How many hours of sunshine does Ames have in December?

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

What is the UV index intensity in December in Ames?

In Ames, Iowa, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays.
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).

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").

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).