December weather forecastKnierim, IA
December
Weather in December
The first month of the winter, December, is still a freezing cold month in Knierim, Iowa, with an average temperature varying between 30°F (-1.1°C) and 19.4°F (-7°C).Temperature
The onset of December brings a distinct decrease in the average high-temperature, receding from a frosty 44.8°F (7.1°C) in November to a subzero cold 30°F (-1.1°C). Knierim observes an average low-temperature of 19.4°F (-7°C) during December.Humidity
In December, the average relative humidity is 82%.Rainfall
In Knierim, during December, the rain falls for 2.5 days and regularly aggregates up to 0.43" (11mm) of precipitation. In Knierim, during the entire year, the rain falls for 84.6 days and collects up to 7.91" (201mm) of precipitation.Snowfall
Months with snowfall in Knierim are January through April, October through December. In Knierim, during December, snow falls for 5.5 days and regularly aggregates up to 0.31" (8mm) of snow. In Knierim, during the entire year, snow falls for 29.4 days and aggregates up to 3.62" (92mm) of snow.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 7:28 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 4:55 pm CST.
Sunshine
The average sunshine in December is 4.6h.UV index
In Knierim, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 2 during December translates into the following directions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Knierim, IA
- Average high temperature in December: 30°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (25°F).
- Average low temperature in December: 19.4°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 (12.4°F).
Average pressure in December
Knierim, IA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Knierim, IA
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in December
Knierim, IA
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in December
Knierim, IA
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is May (1.34").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in December
Knierim, IA
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is June (12 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in December
Knierim, IA
- Average snowfall in December: 0.31"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Knierim, IA
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Knierim, IA
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Knierim, IA
- Average sunshine days in December: 24.3 days
The month with the most sunshine days is December (24.3 days).
The month with the least sunshine days is June (15.5 days).
Average UV index in December
Knierim, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in December
Knierim, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and September (Cloud cover 31).
Average visibility in December
Knierim, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
