December weather forecastFairfield, IA
December
Weather in December
Finally, December welcomes winter in Fairfield with the lowest temperatures and shortest daylight hours of 9.3 hours encountered in the year. The month also brings back the snowy conditions, with an average snowfall of 1.65" (42mm). Increased cloud cover of 52% and humidity of 79% solidify the wintry feel, making it a true winter wonderland. Higher wind speeds up to 10.1mph (16.3km/h) result in a harsh, biting cold. The year concludes on a chilly note, setting the tone for January's winter peak.Temperature
The beginning of December involves a decrease in the average high-temperature, transitioning from a chilly 47.7°F (8.7°C) in November to a cold 35.2°F (1.8°C). During December, Fairfield experiences a consistent low-temperature average of 24.1°F (-4.4°C).Humidity
In December, the average relative humidity is 79%.Rainfall
The months with the least rainfall in Fairfield are January and December Rain falls for 7.1 days and accumulates 1.18" (30mm) of rain.Snowfall
January through April, October through December are months with snowfall. In December, in Fairfield, it is snowing for 6.5 days. Throughout December, 1.65" (42mm) of snow is accumulated. Throughout the year, in Fairfield, there are 32.1 snowfall days, and 14.33" (364mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Fairfield.On the first day of December, sunrise is at 7:14 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 4:49 pm CST.
Sunshine
In December, the average sunshine in Fairfield is 4.5h.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Fairfield, IA
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.1°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in December
Fairfield, 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 (29.9"Hg).
Average wind speed in December
Fairfield, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in December
Fairfield, IA
- Average humidity in December: 79%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Fairfield, IA
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and December (1.18").
Average rainfall days in December
Fairfield, IA
- Average rainfall days in December: 7.1 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Fairfield, IA
- Average snowfall in December: 1.65"
The months with the highest snowfall are January and February (4.33").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Fairfield, IA
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Fairfield, IA
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 30min
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 6min).
Average sunshine days in December
Fairfield, IA
- Average sunshine days in December: 18 days
The months with the most sunshine days are October and November (18.8 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Fairfield, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Fairfield, IA
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Fairfield, 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).
