December weather forecast
Whittier, IA

Share

Weather in December

The first month of the winter, December, is also a wintry month in Whittier, Iowa, with temperature in the range of an average high of 32.4°F (0.2°C) and an average low of 22.1°F (-5.5°C).

Temperature

As December begins, there is a decrease in the average high-temperature, falling from a chilly 44.8°F (7.1°C) in November to a cold 32.4°F (0.2°C). Whittier in December experiences a low-temperature average of 22.1°F (-5.5°C).

Humidity

The average relative humidity in December is 82%.

Rainfall

In Whittier, in December, during 6.5 rainfall days, 1.3" (33mm) of precipitation is typically accumulated. In Whittier, Iowa, during the entire year, the rain falls for 137.5 days and collects up to 27.68" (703mm) of precipitation.

Snowfall

Months with snowfall in Whittier, Iowa, are January through April, October through December. In December, in Whittier, it is snowing for 8.7 days. Throughout December, 2.24" (57mm) of snow is accumulated. In Whittier, during the entire year, snow falls for 38.8 days and aggregates up to 15.16" (385mm) of snow.

Daylight

With an average of 9h and 12min of daylight, December has the shortest days of the year in Whittier, Iowa.
On the first day of December, sunrise is at 7:15 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:44 pm CST.

Sunshine

In December, the average sunshine in Whittier is 4.2h.

UV index

The month with the lowest UV index in Whittier is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: In December, the maximum UV index of 1 translates into these guidelines:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
[Resources]

Frequently asked questions

How cold is December in Whittier?

In December, in Whittier, the average high-temperature is 32.4°F (0.2°C), and the average low-temperature is 22.1°F (-5.5°C).

What is the average humidity in December in Whittier?

In December, the average relative humidity in Whittier is 82%.

How much does it rain in Whittier in December?

In December, the rain falls for 6.5 days. Throughout December, 1.3" (33mm) of precipitation is accumulated.

How much does it snow in Whittier in December?

In Whittier, during December, snow falls for 8.7 days and regularly aggregates up to 2.24" (57mm) of snow.

What is the month with the shortest days in Whittier?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

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

The average day length in December in Whittier, Iowa, is 9h and 10min.

When is the sunrise / sunset in December in Whittier?

On the first day of December in Whittier, Iowa, sunrise is at 7:15 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 4:44 pm CST.

How many hours of sunshine does Whittier have in December?

In Whittier, Iowa, the average sunshine duration in December is 4.2h.

When is the lowest UV index in Whittier?

The month with the lowest UV index in Whittier is December, with an average maximum UV index of 1.

How high is the UV index in December in Whittier?

In Whittier, Iowa, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from 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
Whittier, IA

Average temperature in December - Whittier, IA
  • Average high temperature in December: 32.4°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.5°F).

  • Average low temperature in December: 22.1°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

[Resources]

Average pressure in December
Whittier, IA

Average pressure in December - Whittier, IA
  • Average pressure in December: 30.1"Hg

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

[Resources]

Average wind speed in December
Whittier, IA

Average wind speed in December - Whittier, IA
  • Average wind speed in December: 10mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

[Resources]

Average humidity in December
Whittier, IA

Average humidity in December - Whittier, IA
  • Average humidity in December: 82%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (74%).

[Resources]

Average rainfall in December
Whittier, IA

Average rainfall in December - Whittier, IA
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is February (1.02").

[Resources]

Average rainfall days in December
Whittier, IA

Average rainfall days in December - Whittier, IA
  • Average rainfall days in December: 6.5 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (4.1 days).

[Resources]

Average snowfall in December
Whittier, IA

Average snowfall in December - Whittier, IA
  • Average snowfall in December: 2.24"

The month with the highest snowfall is January (5.16").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in December
Whittier, IA

Average snowfall days in December - Whittier, IA
  • Average snowfall days in December: 8.7 days

The month with the highest number of snowfall days is January (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Whittier, IA
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

[Resources]

Average sunshine days in December
Whittier, IA

Average sunshine days in December - Whittier, IA
  • Average sunshine days in December: 18.2 days

The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is May (10.9 days).

[Resources]

Average UV index in December
Whittier, IA

Average UV index in December - Whittier, IA
  • Average UV index in December: 1

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

[Resources]

Average cloud cover in December
Whittier, IA

Average cloud cover in December - Whittier, IA
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 30).

[Resources]

Average visibility in December
Whittier, IA

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

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

[Resources]

Whittier, Iowa, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location