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
December's onset brings a reduction in the average high-temperature, from a frosty 46.8°F (8.2°C) in November to a wintry 33.6°F (0.9°C). During December, Guernsey observes a consistent average nighttime temperature of 22.3°F (-5.4°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Guernsey, during December, the rain falls for 7.3 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, in Guernsey, there are 145.5 rainfall days, and 30.39" (772mm) of precipitation is accumulated.Snowfall
Months with snowfall in Guernsey are January through May, October through December. In Guernsey, in December, during 7.5 snowfall days, 2.24" (57mm) of snow is typically accumulated. Throughout the year, there are 39 snowfall days, and 16.65" (423mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:17 am and sunset at 4:39 pm. On the last day of December, in Guernsey, sunrise is at 7:36 am and sunset at 4:49 pm CST.
Sunshine
The average sunshine in December in Guernsey, Iowa, is 4.6h.UV index
The average daily maximum UV index in December in Guernsey is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 2 during December translates into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold is December in Guernsey?
What is the average humidity in December in Guernsey?
How much does it rain in Guernsey in December?
How many days does it snow in December in Guernsey?
What is the month with the shortest days in Guernsey?
How many hours of daylight does Guernsey have in December?
When are sunrise and sunset in December in Guernsey?
How long on average sun shines in December in Guernsey?
What is the UV index reading in December in Guernsey?
Average temperature in December
Guernsey, IA
- Average high temperature in December: 33.6°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in December: 22.3°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).
Average pressure in December
Guernsey, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Guernsey, IA
- Average wind speed in December: 10.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in December
Guernsey, IA
- Average humidity in December: 80%
The months with the highest relative humidity are January and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Guernsey, IA
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
Guernsey, IA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is June (18.9 days).
The month with the least rainy days is February (5 days).
Average snowfall in December
Guernsey, IA
- Average snowfall in December: 2.24"
The month with the highest snowfall is February (5.24").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Guernsey, IA
- Average snowfall days in December: 7.5 days
The month with the highest number of snowfall days is January (10.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Guernsey, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Guernsey, IA
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in December
Guernsey, 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 January (UV index 1).
Average cloud cover in December
Guernsey, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Guernsey, 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).
Guernsey, Iowa, USA
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