December weather forecastHartwick, IA
December
Weather in December
The first month of the winter, December, is also an icy month in Hartwick, Iowa, with an average temperature fluctuating between 22.1°F (-5.5°C) and 32.9°F (0.5°C).Temperature
Hartwick's December weather shows a moderate shift in high-temperatures, falling from November's chilly 46.2°F (7.9°C) to a wintry 32.9°F (0.5°C). In Hartwick, the expected average low-temperature for December is a freezing cold 22.1°F (-5.5°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In December, in Hartwick, the rain falls for 7.2 days. Throughout December, 1.26" (32mm) of precipitation is accumulated. Throughout the year, there are 135.6 rainfall days, and 27.48" (698mm) of precipitation is accumulated.Snowfall
Months with snowfall in Hartwick are January through May, October through December. In Hartwick, during December, snow falls for 7.3 days and regularly aggregates up to 2.13" (54mm) of snow. In Hartwick, during the entire year, snow falls for 35.5 days and aggregates up to 13.98" (355mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:17 am and sunset at 4:39 pm. On the last day of December, in Hartwick, sunrise is at 7:36 am and sunset at 4:48 pm CST.
Sunshine
In Hartwick, the average sunshine in December 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 health risk from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Hartwick, IA
- Average high temperature in December: 32.9°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 22.1°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in December
Hartwick, 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 (29.89"Hg).
Average wind speed in December
Hartwick, IA
- Average wind speed in December: 10.2mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Hartwick, IA
- Average humidity in December: 81%
The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Hartwick, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is May (4.21").
The driest month (with the least rainfall) is January (1.02").
Average rainfall days in December
Hartwick, IA
- Average rainfall days in December: 7.2 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in December
Hartwick, IA
- Average snowfall in December: 2.13"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hartwick, IA
- Average snowfall days in December: 7.3 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hartwick, IA
- Average daylight in December: 9h and 12min
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 12min).
- 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 0min).
Average sunshine days in December
Hartwick, IA
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in December
Hartwick, IA
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Hartwick, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in December
Hartwick, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
