December weather forecastThompson, IA
December
Weather in December
December, the first month of the winter in Thompson, is still a freezing cold month, with an average temperature varying between 27.7°F (-2.4°C) and 17.4°F (-8.1°C).Temperature
Thompson's December weather is characterized by a distinct downswing in high-temperatures, falling from November's cold 42.6°F (5.9°C) to a subzero cold 27.7°F (-2.4°C). During December, the average low-temperature in Thompson is 17.4°F (-8.1°C).Humidity
The average relative humidity in December is 86%.Rainfall
In December, in Thompson, the rain falls for 5.7 days. Throughout December, 1.26" (32mm) of precipitation is accumulated. Throughout the year, in Thompson, Iowa, there are 136.2 rainfall days, and 25.39" (645mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Thompson, during December, snow falls for 12 days and regularly aggregates up to 3.35" (85mm) of snow. Throughout the year, in Thompson, there are 55.1 snowfall days, and 22.05" (560mm) of snow is accumulated.Daylight
December has the shortest days of the year in Thompson, Iowa, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:40 pm. On the last day of December, in Thompson, Iowa, sunrise is at 7:47 am and sunset at 4:49 pm CST.
Sunshine
In December, the average sunshine is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Thompson, IA
- Average high temperature in December: 27.7°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 (22.1°F).
- Average low temperature in December: 17.4°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 (9.9°F).
Average pressure in December
Thompson, IA
- Average pressure in December: 30.11"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
Thompson, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in December
Thompson, IA
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Thompson, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is June (4.21").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Thompson, IA
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Thompson, IA
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Thompson, IA
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Thompson, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Thompson, IA
- Average sunshine days in December: 15.6 days
The months with the most sunshine days are October and November (17.4 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Thompson, 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 and December (UV index 1).
Average cloud cover in December
Thompson, 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 32).
Average visibility in December
Thompson, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
