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
The onset of December is marked by a decrease in temperature, transitioning from a chilly 45.7°F (7.6°C) in November to an icy 33.4°F (0.8°C). Grand Mound, during the nights of December, experiences an average temperature drop to a subzero cold 22.6°F (-5.2°C).Humidity
In Grand Mound, the average relative humidity in December is 82%.Rainfall
In Grand Mound, in December, it is raining for 7.3 days, with typically 1.38" (35mm) of accumulated precipitation. Throughout the year, there are 142.1 rainfall days, and 28.35" (720mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Grand Mound. In Grand Mound, Iowa, during December, snow falls for 8.5 days and regularly aggregates up to 2.28" (58mm) of snow. Throughout the year, there are 39.7 snowfall days, and 15.67" (398mm) of snow is accumulated.Daylight
December has the shortest days of the year in Grand Mound, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:41 pm CST.
Sunshine
The average sunshine in December is 4.3h.UV index
In Grand Mound, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Grand Mound?
What is the average humidity in December in Grand Mound?
How much does it rain in Grand Mound in December?
How many days does it snow in December in Grand Mound?
What is the month with the shortest days in Grand Mound?
How many hours of daylight does Grand Mound have in December?
When are sunrise and sunset in December in Grand Mound?
How long on average sun shines in December in Grand Mound?
What is the UV index reading in December in Grand Mound?
Average temperature in December
Grand Mound, IA
- Average high temperature in December: 33.4°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (26.6°F).
- Average low temperature in December: 22.6°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in December
Grand Mound, 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
Grand Mound, IA
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in December
Grand Mound, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Grand Mound, IA
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is May (4.61").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in December
Grand Mound, IA
- Average rainfall days in December: 7.3 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Grand Mound, IA
- Average snowfall in December: 2.28"
The month with the highest snowfall is January (5.2").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grand Mound, IA
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (11.5 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
Grand Mound, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Grand Mound, IA
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in December
Grand Mound, IA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Grand Mound, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Grand Mound, 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).
Grand Mound, Iowa, USA
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