December weather forecastGraf, IA
December
Weather in December
December, the first month of the winter in Graf, is also a subzero cold month, with an average temperature varying between 20.8°F (-6.2°C) and 31.1°F (-0.5°C).Temperature
With December's onset, the average high-temperature recedes from November's chilly 43.7°F (6.5°C) to a subzero cold 31.1°F (-0.5°C). In Graf, the average nighttime temperature during December is a still freezing cold 20.8°F (-6.2°C).Humidity
The average relative humidity in December is 83%.Rainfall
In Graf, in December, it is raining for 6.5 days, with typically 1.1" (28mm) of accumulated precipitation. In Graf, Iowa, during the entire year, the rain falls for 139.8 days and collects up to 24.88" (632mm) of precipitation.Snowfall
Months with snowfall in Graf, Iowa, are January through April, October through December. In Graf, in December, snow falls for 11.3 days, with typically accumulated 2.95" (75mm) of snow. In Graf, during the entire year, snow falls for 52.2 days and aggregates up to 16.14" (410mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Graf.On the first day of December in Graf, sunrise is at 7:14 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:40 pm CST.
Sunshine
In Graf, Iowa, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The average daily UV index of 1 in December transforms into the following instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Graf, IA
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in December
Graf, 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
Graf, IA
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in December
Graf, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Graf, IA
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is June (3.5").
The driest months (with the least rainfall) are January and February (1.02").
Average rainfall days in December
Graf, IA
- Average rainfall days in December: 6.5 days
The months with the highest number of rainy days are May and June (18.3 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in December
Graf, IA
- Average snowfall in December: 2.95"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Graf, IA
- Average snowfall days in December: 11.3 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Graf, IA
- Average daylight in December: 9h and 6min
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 6min).
- Average sunshine in December: 4h and 6min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Graf, IA
- Average sunshine days in December: 16.7 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (9.3 days).
Average UV index in December
Graf, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in December
Graf, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Graf, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
