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
Allison's weather in December involves a decrease in the average high-temperature, moving down from November's chilly 43.9°F (6.6°C) to a freezing cold 30.6°F (-0.8°C). In Allison, an average temperature of 19.9°F (-6.7°C) is noted during December nights.Humidity
In Allison, the average relative humidity in December is 83%.Rainfall
In December, in Allison, the rain falls for 6.4 days. Throughout December, 1.65" (42mm) of precipitation is accumulated. In Allison, during the entire year, the rain falls for 148.3 days and collects up to 31.02" (788mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Allison. In Allison, Iowa, in December, during 12.5 snowfall days, 4.13" (105mm) of snow is typically accumulated. Throughout the year, there are 53.2 snowfall days, and 22.4" (569mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 7:22 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 4:47 pm CST.
Sunshine
The average sunshine in December in Allison is 4.3h.UV index
The average daily maximum UV index in December in Allison is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 during December translates into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
How cold is December in Allison?
What is the average humidity in December in Allison?
How much does it rain in Allison in December?
How many days does it snow in December in Allison?
What is the month with the shortest days in Allison?
How many hours of daylight does Allison have in December?
What time are sunrise and sunset in December in Allison?
How long on average sun shines in December in Allison?
What is the UV index intensity in December in Allison?
Average temperature in December
Allison, IA
- Average high temperature in December: 30.6°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 (24.1°F).
- Average low temperature in December: 19.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in December
Allison, IA
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Allison, IA
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Allison, IA
- Average humidity in December: 83%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Allison, IA
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Allison, IA
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is June (20.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Allison, IA
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Allison, IA
- Average snowfall days in December: 12.5 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Allison, 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 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Allison, IA
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in December
Allison, IA
- Average UV index in December: 2
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Allison, IA
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in December
Allison, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Allison, Iowa, USA
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