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
December's onset brings a slight change in high-temperatures, falling from a frosty 49.3°F (9.6°C) in November to a cold 35.1°F (1.7°C). Bartlett experiences an average low-temperature of 22.6°F (-5.2°C) in month of December.Humidity
In December, the average relative humidity is 77%.Rainfall
In Bartlett, in December, during 5.1 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Bartlett, during the entire year, the rain falls for 122.8 days and collects up to 26.69" (678mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Bartlett. In Bartlett, during December, snow falls for 5.9 days and regularly aggregates up to 1.61" (41mm) of snow. In Bartlett, during the entire year, snow falls for 28.2 days and aggregates up to 10.91" (277mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:29 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:05 pm CST.
Sunshine
In December, the average sunshine is 5h.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 2 during December translates into these guidelines:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Bartlett?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Bartlett have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Bartlett, IA
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in December: 22.6°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure in December
Bartlett, IA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Bartlett, IA
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in December
Bartlett, IA
- Average humidity in December: 77%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (66%).
Average rainfall in December
Bartlett, IA
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is June (4.33").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in December
Bartlett, IA
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in December
Bartlett, IA
- Average snowfall in December: 1.61"
The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Bartlett, IA
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Bartlett, IA
- Average daylight in December: 9h and 2min
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: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Bartlett, IA
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in December
Bartlett, IA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Bartlett, IA
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Bartlett, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Bartlett, Iowa, USA
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