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 chilly 47.3°F (8.5°C) in November to a cold 34.7°F (1.5°C). Hartford's December nights cool down to an average low-temperature of 22.8°F (-5.1°C).Humidity
In Hartford, the average relative humidity in December is 78%.Rainfall
In Hartford, during December, the rain falls for 5.4 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Hartford, there are 124.7 rainfall days, and 26.34" (669mm) of precipitation is accumulated.Snowfall
Months with snowfall in Hartford, Iowa, are January through May, October through December. In Hartford, in December, during 7 snowfall days, 1.42" (36mm) of snow is typically accumulated. Throughout the year, in Hartford, there are 35.2 snowfall days, and 13.31" (338mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Hartford.On the first day of December in Hartford, Iowa, sunrise is at 7:21 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:54 pm CST.
Sunshine
In Hartford, the average sunshine in December is 4.6h.UV index
In Hartford, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
How cold is December in Hartford?
What is the average humidity in December in Hartford?
How many days does it rain in December in Hartford?
How much does it snow in Hartford in December?
What is the month with the shortest days in Hartford?
How many hours of daylight does Hartford have in December?
When are sunrise and sunset in December in Hartford?
How long on average sun shines in December in Hartford?
How high is the UV index in December in Hartford?
Average temperature in December
Hartford, IA
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in December: 22.8°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in December
Hartford, 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 (29.89"Hg).
Average wind speed in December
Hartford, IA
- Average wind speed in December: 9.8mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in December
Hartford, IA
- Average humidity in December: 78%
The months with the highest relative humidity are January, February and June (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Hartford, IA
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in December
Hartford, IA
- Average rainfall days in December: 5.4 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Hartford, IA
- Average snowfall in December: 1.42"
The month with the highest snowfall is January (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hartford, IA
- Average snowfall days in December: 7 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hartford, IA
- Average daylight in December: 9h and 1min
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 12min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Hartford, IA
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in December
Hartford, 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
Hartford, IA
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility in December
Hartford, 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).
Hartford, Iowa, USA
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