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
A moderate decline in the average high-temperature is seen during December, decreasing from a frosty 43.7°F (6.5°C) in November to a subzero cold 31.1°F (-0.5°C). Throughout December, Greeley encounters an average temperature drop to 20.5°F (-6.4°C).Humidity
The average relative humidity in December in Greeley is 83%.Rainfall
December is the month with the least rainfall. Rain falls for 4.5 days and accumulates 0.47" (12mm) of precipitation.Snowfall
January through April, October through December are months with snowfall in Greeley. In Greeley, in December, snow falls for 8.8 days, with typically accumulated 0.94" (24mm) of snow. Throughout the year, in Greeley, Iowa, there are 39.4 snowfall days, and 6.81" (173mm) of snow is accumulated.Daylight
The month with the shortest days in Greeley is December, with an average of 9h and 6min of daylight.On the first day of December in Greeley, sunrise is at 7:16 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:42 pm CST.
Sunshine
In Greeley, the average sunshine in December is 4h.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 low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, an average UV index of 1 transforms into the following instructions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
How cold is it in Greeley in December?
What is the average humidity in December in Greeley?
What is the driest month in Greeley?
How much does it rain in Greeley in December?
How many days does it snow in December in Greeley?
What is the month with the shortest days in Greeley?
What is the average length of the day in December in Greeley?
What time are sunrise and sunset in December in Greeley?
How many hours of sunshine does Greeley have in December?
When is the lowest UV index in Greeley?
What is the UV index intensity in December in Greeley?
Average temperature in December
Greeley, IA
- Average high temperature in December: 31.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 20.5°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).
Average pressure in December
Greeley, 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
Greeley, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Greeley, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in December
Greeley, IA
- Average rainfall in December: 0.47"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is December (0.47").
Average rainfall days in December
Greeley, IA
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2.6 days).
Average snowfall in December
Greeley, IA
- Average snowfall in December: 0.94"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Greeley, IA
- Average snowfall days in December: 8.8 days
The month with the highest number of snowfall days is January (10.8 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
Greeley, 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 0min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Greeley, IA
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in December
Greeley, 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
Greeley, IA
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Greeley, 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).
Greeley, Iowa, USA
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