December weather forecastSaint Lucas, IA
December
Weather in December
December, the first month of the winter in Saint Lucas, is still a freezing cold month, with temperature in the range of an average high of 29.5°F (-1.4°C) and an average low of 18.9°F (-7.3°C).Temperature
December is characterized by a reduction in the average high-temperature, from an icy 42.6°F (5.9°C) in November to a subzero cold 29.5°F (-1.4°C). Saint Lucas's average low-temperature for the month of December records at 18.9°F (-7.3°C).Humidity
In December, the average relative humidity is 84%.Rainfall
In December, the rain falls for 5.8 days. Throughout December, 1.69" (43mm) of precipitation is accumulated. Throughout the year, there are 146.5 rainfall days, and 31.3" (795mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Saint Lucas. In Saint Lucas, in December, snow falls for 13.1 days, with typically accumulated 5.04" (128mm) of snow. In Saint Lucas, during the entire year, snow falls for 59.9 days and aggregates up to 24.84" (631mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Saint Lucas, Iowa.On the first day of the month, sunrise is at 7:20 am and sunset at 4:33 pm. On the last day of December, sunrise is at 7:39 am and sunset at 4:43 pm CST.
Sunshine
The average sunshine in December in Saint Lucas, Iowa, is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Saint Lucas, IA
- Average high temperature in December: 29.5°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in December: 18.9°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in December
Saint Lucas, IA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in December
Saint Lucas, IA
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in December
Saint Lucas, IA
- Average humidity in December: 84%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in December
Saint Lucas, IA
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is June (5.08").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in December
Saint Lucas, IA
- Average rainfall days in December: 5.8 days
The months with the highest number of rainy days are May and June (19.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Saint Lucas, IA
- Average snowfall in December: 5.04"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Saint Lucas, IA
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Saint Lucas, IA
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Saint Lucas, IA
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in December
Saint Lucas, IA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Saint Lucas, IA
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Saint Lucas, IA
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
