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 average high-temperature exhibits a considerable decrease in December, dropping from a frosty 43.2°F (6.2°C) in November to a freezing cold 27.3°F (-2.6°C). In Lester, December's nights observe an average temperature dip to 15.8°F (-9°C).Humidity
In December, the average relative humidity is 85%.Rainfall
In Lester, during December, the rain falls for 4.5 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Lester, during the entire year, the rain falls for 119.2 days and collects up to 22.13" (562mm) of precipitation.Snowfall
Months with snowfall in Lester are January through May, October through December. In December, it is snowing for 11.6 days. Throughout December, 3.46" (88mm) of snow is accumulated. In Lester, during the entire year, snow falls for 48.3 days and aggregates up to 19.29" (490mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:38 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:57 am and sunset at 4:59 pm CST.
Sunshine
In December, the average sunshine is 4.3h.UV index
The average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 2 during December translates into the following directions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Lester, IA
- Average high temperature in December: 27.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in December: 15.8°F
The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in December
Lester, 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
Lester, IA
- Average wind speed in December: 10.1mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Lester, IA
- Average humidity in December: 85%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Lester, IA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in December
Lester, IA
- Average rainfall days in December: 4.5 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in December
Lester, IA
- Average snowfall in December: 3.46"
The month with the highest snowfall is February (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lester, IA
- Average snowfall days in December: 11.6 days
The month with the highest number of snowfall days is December (11.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lester, IA
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Lester, IA
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in December
Lester, 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
Lester, IA
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Lester, IA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Lester, Iowa, USA
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