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 brings with it a considerable temperature decrease, with average high-temperatures dropping from November's chilly 44.1°F (6.7°C) to a subzero cold 28.8°F (-1.8°C). December brings Granville a consistent average low-temperature of 17.4°F (-8.1°C).Humidity
In December, the average relative humidity in Granville is 84%.Rainfall
In Granville, Iowa, in December, it is raining for 4.5 days, with typically 1.42" (36mm) of accumulated precipitation. In Granville, during the entire year, the rain falls for 124 days and collects up to 24.09" (612mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Granville, in December, snow falls for 11 days, with typically accumulated 3.11" (79mm) of snow. Throughout the year, in Granville, there are 49.5 snowfall days, and 18.39" (467mm) of snow is accumulated.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Granville.On the first day of December, sunrise is at 7:35 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:54 am and sunset at 4:59 pm CST.
Sunshine
The average sunshine in December is 4.4h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 1 in December, converts into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. 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 in Granville?
What is the average humidity in December in Granville?
How many days does it rain in December in Granville?
How much does it snow in Granville in December?
What is the month with the shortest days in Granville?
What is the average length of the day in December in Granville?
When is the sunrise / sunset in December in Granville?
How long on average sun shines in December in Granville?
When is the lowest UV index in Granville?
How high is the UV index in December in Granville?
Average temperature in December
Granville, IA
- Average high temperature in December: 28.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in December: 17.4°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (11.3°F).
Average pressure in December
Granville, IA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Granville, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Granville, IA
- Average humidity in December: 84%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Granville, IA
- Average rainfall in December: 1.42"
The wettest month (with the highest rainfall) is June (3.82").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Granville, IA
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in December
Granville, IA
- Average snowfall in December: 3.11"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Granville, IA
- Average snowfall days in December: 11 days
The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Granville, IA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Granville, IA
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in December
Granville, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Granville, 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 July (Cloud cover 28).
Average visibility in December
Granville, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Granville, Iowa, USA
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