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
Dedham's December weather comes with a decrease in average high-temperatures, moving from a frosty 45.9°F (7.7°C) in November to a freezing cold 31.8°F (-0.1°C). Throughout December, an average nighttime temperature of 20.8°F (-6.2°C) is experienced.Humidity
In December, the average relative humidity in Dedham is 80%.Rainfall
In December, in Dedham, Iowa, the rain falls for 5 days. Throughout December, 1.65" (42mm) of precipitation is accumulated. Throughout the year, in Dedham, Iowa, there are 130.1 rainfall days, and 27.28" (693mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, in Dedham, it is snowing for 9.9 days. Throughout December, 4.02" (102mm) of snow is accumulated. Throughout the year, there are 44.8 snowfall days, and 19.8" (503mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Dedham.On the first day of the month, sunrise is at 7:28 am and sunset at 4:49 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:58 pm CST.
Sunshine
The average sunshine in December is 4.8h.UV index
In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Around midday, solar radiation is most harmful; hence, exposure should be limited. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
How cold is December in Dedham?
What is the average humidity in December in Dedham?
How much does it rain in Dedham in December?
How much does it snow in Dedham in December?
What is the month with the shortest days in Dedham?
What is the average length of the day in December in Dedham?
When are sunrise and sunset in December in Dedham?
How long on average sun shines in December in Dedham?
What is the UV index reading in December in Dedham?
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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