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 decrease in the average high-temperature is observed during December, shifting from a frosty 43°F (6.1°C) in November to a subzero cold 29.8°F (-1.2°C). McGregor records an average nighttime low-temperature of 19°F (-7.2°C) throughout December.Humidity
The average relative humidity in December is 84%.Rainfall
In December, the rain falls for 4.7 days. Throughout December, 1.06" (27mm) of precipitation is accumulated. Throughout the year, in McGregor, there are 124.7 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In McGregor, in December, during 9.8 snowfall days, 2.87" (73mm) of snow is typically accumulated. Throughout the year, there are 44.5 snowfall days, and 15.47" (393mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:17 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 4:40 pm CST.
Sunshine
In December, the average sunshine in McGregor is 3.9h.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 1 during December leads to these advisories:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does McGregor have in December?
When are sunrise and sunset in December in McGregor?
How many hours of sunshine does McGregor have in December?
What are the months with the lowest UV index in McGregor?
How high is the UV index in December?
Average temperature in December
McGregor, IA
- Average high temperature in December: 29.8°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in December: 19°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
McGregor, 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
McGregor, IA
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in December
McGregor, IA
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (88%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
McGregor, IA
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
McGregor, IA
- Average rainfall days in December: 4.7 days
The month with the highest number of rainy days is June (18.6 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in December
McGregor, IA
- Average snowfall in December: 2.87"
The month with the highest snowfall is February (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
McGregor, IA
- Average snowfall days in December: 9.8 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
McGregor, 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: 3h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
McGregor, IA
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in December
McGregor, 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, November and December (UV index 1).
Average cloud cover in December
McGregor, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
McGregor, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
McGregor, Iowa, USA
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