December weather forecast
Masonville, IA

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Weather in December

December, the first month of the winter in Masonville, is still a freezing cold month, with an average temperature ranging between min 20.5°F (-6.4°C) and max 31.1°F (-0.5°C).

Temperature

Masonville observes a minor decrease in the average high-temperature with the arrival of December, falling from November's frosty 43.7°F (6.5°C) to a freezing cold 31.1°F (-0.5°C). An average low-temperature of 20.5°F (-6.4°C) is recorded during the nights in December in Masonville, Iowa.

Humidity

In December, the average relative humidity is 83%.

Rainfall

December is the month with the least rainfall. Rain falls for 4.5 days and accumulates 0.47" (12mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Masonville, during December, snow falls for 8.8 days and regularly aggregates up to 0.94" (24mm) of snow. Throughout the year, there are 39.4 snowfall days, and 6.81" (173mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:43 pm CST.

Sunshine

In Masonville, the average sunshine in December is 4h.

UV index

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Updated: Aug 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The high-temperature, in December, in Masonville, is 31.1°F (-0.5°C), while the low-temperature averages to 20.5°F (-6.4°C).

What is the average humidity in December?

The average relative humidity in December is 83%.

What is the driest month?

The month with the least rainfall is December, when the rain falls for 4.5 days and typically collects 0.47" (12mm) of precipitation.

How many days does it rain in December?

In Masonville, during December, the rain falls for 4.5 days and regularly aggregates up to 0.47" (12mm) of precipitation.

How much does it snow in December?

In Masonville, in December, snow falls for 8.8 days, with typically accumulated 0.94" (24mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 6min of daylight.

What is the average length of the day in December?

In Masonville, the average day length in December is 9h and 8min.

When are sunrise and sunset in December?

On the first day of December, sunrise is at 7:16 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:43 pm CST.

How many hours of sunshine does Masonville have in December?

In December, the average sunshine duration is 4h.

When is the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 1. A UV Index 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
Masonville, IA

Average temperature in December - Masonville, IA
  • Average high temperature in December: 31.1°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in December: 20.5°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).

Average pressure in December
Masonville, IA

Average pressure in December - Masonville, 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).

Average wind speed in December
Masonville, IA

Average wind speed in December - Masonville, IA
  • Average wind speed in December: 10.2mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity in December
Masonville, IA

Average humidity in December - Masonville, IA
  • Average humidity in December: 83%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (75%).

Average rainfall in December
Masonville, IA

Average rainfall in December - Masonville, IA
  • Average rainfall in December: 0.47"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is December (0.47").

Average rainfall days in December
Masonville, IA

Average rainfall days in December - Masonville, IA
  • Average rainfall days in December: 4.5 days

The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2.6 days).

Average snowfall in December
Masonville, IA

Average snowfall in December - Masonville, IA
  • Average snowfall in December: 0.94"

The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Masonville, IA

Average snowfall days in December - Masonville, IA
  • Average snowfall days in December: 8.8 days

The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in December / Average sunshine in December - Masonville, 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 6min).

  • Average sunshine in December: 4h and 0min

The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in December
Masonville, IA

Average sunshine days in December - Masonville, IA
  • Average sunshine days in December: 19.7 days

The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is June (11.7 days).

Average UV index in December
Masonville, IA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).

Average cloud cover in December
Masonville, IA

Average cloud cover in December - Masonville, IA
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).

Average visibility in December
Masonville, IA

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

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

Masonville, Iowa, USA

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