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 start of December brings a distinct shift in the average high-temperature, dropping from November's wintry 42.6°F (5.9°C) to a freezing cold 27.7°F (-2.4°C). During the month of December, an average temperature of 17.4°F (-8.1°C) is noted during the nights.Humidity
In December, the average relative humidity in Leland is 86%.Rainfall
In Leland, in December, it is raining for 5.7 days, with typically 1.26" (32mm) of accumulated precipitation. In Leland, during the entire year, the rain falls for 136.2 days and collects up to 25.39" (645mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Leland. In Leland, during December, snow falls for 12 days and regularly aggregates up to 3.35" (85mm) of snow. Throughout the year, in Leland, Iowa, there are 55.1 snowfall days, and 22.05" (560mm) of snow is accumulated.Daylight
December has the shortest days of the year in Leland, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:27 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:48 pm CST.
Sunshine
In December, the average sunshine in Leland is 4h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Leland, Iowa. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 1 in December translates into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Leland?
What is the average humidity in December in Leland?
How much does it rain in Leland in December?
How much does it snow in Leland in December?
What is the month with the shortest days in Leland?
What is the average length of the day in December in Leland?
What time are sunrise and sunset in December in Leland?
How long on average sun shines in December in Leland?
When is the lowest UV index in Leland?
What is the UV index intensity in December in Leland?
Average temperature in December
Leland, IA
- Average high temperature in December: 27.7°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.1°F).
- Average low temperature in December: 17.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Leland, 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 (29.88"Hg).
Average wind speed in December
Leland, IA
- Average wind speed in December: 10.2mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in December
Leland, IA
- Average humidity in December: 86%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Leland, IA
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is June (4.21").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in December
Leland, IA
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in December
Leland, IA
- Average snowfall in December: 3.35"
The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Leland, IA
- Average snowfall days in December: 12 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Leland, IA
- Average daylight in December: 9h and 0min
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 0min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Leland, IA
- Average sunshine days in December: 15.6 days
The months with the most sunshine days are October and November (17.4 days).
The month with the least sunshine days is June (9.2 days).
Average UV index in December
Leland, IA
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Leland, IA
- Average cloud cover in December: 59
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
Leland, IA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
Leland, Iowa, USA
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