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
With the onset of December, Green Island's average high-temperature adjusts, receding from November's frosty 44.8°F (7.1°C) to an icy 32°F (0°C). Green Island, in December, experiences an average temperature of 21.6°F (-5.8°C) at night.Humidity
In Green Island, Iowa, the average relative humidity in December is 82%.Rainfall
In Green Island, in December, it is raining for 6.5 days, with typically 1.5" (38mm) of accumulated precipitation. In Green Island, Iowa, during the entire year, the rain falls for 145.6 days and collects up to 28.9" (734mm) of precipitation.Snowfall
Months with snowfall in Green Island are January through April, October through December. In Green Island, during December, snow falls for 8.7 days and regularly aggregates up to 2.72" (69mm) of snow. In Green Island, during the entire year, snow falls for 40.1 days and aggregates up to 16.61" (422mm) 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 Green Island, sunrise is at 7:10 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:39 pm CST.
Sunshine
In December, the average sunshine in Green Island is 4.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Green Island. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. It's recommended to limit sun exposure when its radiation is at its peak during midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is it in Green Island in December?
What is the average humidity in December in Green Island?
How many days does it rain in December in Green Island?
How much does it snow in Green Island in December?
What is the month with the shortest days in Green Island?
What is the average length of the day in December in Green Island?
When are sunrise and sunset in December in Green Island?
How long on average sun shines in December in Green Island?
What are the months with the lowest UV index in Green Island?
What is the UV index intensity in December in Green Island?
Average temperature in December
Green Island, IA
- Average high temperature in December: 32°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in December: 21.6°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in December
Green Island, 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
Green Island, IA
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Green Island, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Green Island, IA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in December
Green Island, IA
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is February (4.5 days).
Average snowfall in December
Green Island, IA
- Average snowfall in December: 2.72"
The month with the highest snowfall is January (4.61").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Green Island, IA
- Average snowfall days in December: 8.7 days
The month with the highest number of snowfall days is January (10.6 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
Green Island, 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 month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Green Island, IA
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (9.5 days).
Average UV index in December
Green Island, IA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Green Island, IA
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in December
Green Island, 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).
Green Island, Iowa, USA
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