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
The decrease of average high-temperatures is mild in December, with a decline from a frosty 44.1°F (6.7°C) in November to a subzero cold 30°F (-1.1°C). The average temperature in Thor during December nights dips to a still freezing cold 19°F (-7.2°C).Humidity
In December, the average relative humidity in Thor, Iowa, is 83%.Rainfall
In Thor, during December, the rain falls for 4.8 days and regularly aggregates up to 1.26" (32mm) of precipitation. In Thor, during the entire year, the rain falls for 129.4 days and collects up to 25.04" (636mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Thor. In Thor, in December, during 10.3 snowfall days, 3.03" (77mm) of snow is typically accumulated. In Thor, during the entire year, snow falls for 44 days and aggregates up to 17.44" (443mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:52 pm CST.
Sunshine
In December, the average sunshine in Thor, Iowa, is 4.4h.UV index
In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
How cold is it in Thor in December?
What is the average humidity in December in Thor?
How much does it rain in Thor in December?
How much does it snow in Thor in December?
What is the month with the shortest days in Thor?
How many hours of daylight does Thor have in December?
When are sunrise and sunset in December in Thor?
How long on average sun shines in December in Thor?
How high is the UV index in December in Thor?
Average temperature in December
Thor, IA
- Average high temperature in December: 30°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in December: 19°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure in December
Thor, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Thor, IA
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (11mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in December
Thor, 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 (69%).
Average rainfall in December
Thor, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Thor, IA
- Average rainfall days in December: 4.8 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in December
Thor, IA
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (4.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Thor, IA
- Average snowfall days in December: 10.3 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Thor, 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: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Thor, IA
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (18.1 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in December
Thor, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Thor, IA
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Thor, 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).
Thor, Iowa, USA
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