Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
A shift in Dedham's weather is observed as November turns into December, with the average high temperature reducing from a chilly 45.9°F (7.7°C) to a freezing cold 31.8°F (-0.1°C). Dedham's average low-temperature during December nights is observed to be a still subzero cold 20.8°F (-6.2°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Dedham, in December, it is raining for 5 days, with typically 1.65" (42mm) of accumulated precipitation. In Dedham, during the entire year, the rain falls for 130.1 days and collects up to 27.28" (693mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Dedham, during December, snow falls for 9.9 days and regularly aggregates up to 4.02" (102mm) of snow. In Dedham, during the entire year, snow falls for 44.8 days and aggregates up to 19.8" (503mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December in Dedham, sunrise is at 7:28 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:58 pm CST.
Sunshine
In Dedham, the average sunshine in December is 4.8h.UV index
In December, the average daily maximum UV index in Dedham is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Dedham have in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Dedham have in December?
How high is the UV index in December?
Average temperature in December
Dedham, IA
- Average high temperature in December: 31.8°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in December
Dedham, 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).
Average wind speed in December
Dedham, IA
- Average wind speed in December: 10.6mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in December
Dedham, IA
- Average humidity in December: 80%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are April and October (69%).
Average rainfall in December
Dedham, IA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Dedham, IA
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Dedham, IA
- Average snowfall in December: 4.02"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dedham, IA
- Average snowfall days in December: 9.9 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dedham, 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in December
Dedham, IA
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (10 days).
Average UV index in December
Dedham, 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 February (UV index 1).
Average cloud cover in December
Dedham, IA
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Dedham, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
Dedham, Iowa, USA
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