December weather forecastGrandview, IA
December
Weather in December
December, the first month of the winter in Grandview, is also an icy month, with an average temperature ranging between min 24.3°F (-4.3°C) and max 35.4°F (1.9°C).Temperature
Grandview's progression into December includes a drop in the average high-temperature, from a chilly 47.5°F (8.6°C) in November to a cold 35.4°F (1.9°C). In December, Grandview reports a consistent average low-temperature of 24.3°F (-4.3°C) during the nights.Humidity
In December, the average relative humidity is 80%.Rainfall
February and December are months with the least rain when the rain falls for 3.4 days and typically aggregates up to 0.28" (7mm) of rain.Snowfall
Months with snowfall in Grandview are January through April, October through December. In December, it is snowing for 3.7 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, there are 20.4 snowfall days, and 3.11" (79mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 4:36 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:45 pm CST.
Sunshine
In December, the average sunshine is 4.7h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Grandview. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 1 in December leads to these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Grandview, IA
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 24.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in December
Grandview, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Grandview, IA
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Grandview, IA
- Average humidity in December: 80%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Grandview, IA
- Average rainfall in December: 0.28"
The wettest month (with the highest rainfall) is May (1.1").
The driest months (with the least rainfall) are February and December (0.28").
Average rainfall days in December
Grandview, IA
- Average rainfall days in December: 3.4 days
The month with the highest number of rainy days is June (11 days).
The month with the least rainy days is January (3 days).
Average snowfall in December
Grandview, IA
- Average snowfall in December: 0.12"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grandview, IA
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (6.7 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
Grandview, IA
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 4h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 4h and 18min).
Average sunshine days in December
Grandview, IA
- Average sunshine days in December: 25.3 days
The month with the most sunshine days is December (25.3 days).
The month with the least sunshine days is June (14.8 days).
Average UV index in December
Grandview, 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
Grandview, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Grandview, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
