December weather forecastMenlo, IA
December
Weather in December
The first month of the winter, December, is also a wintry month in Menlo, Iowa, with an average temperature ranging between min 21.7°F (-5.7°C) and max 33.3°F (0.7°C).Temperature
The average high-temperature drops in December, from November's frosty 46.8°F (8.2°C) to an icy 33.3°F (0.7°C). In Menlo, an average low-temperature of 21.7°F (-5.7°C) is recorded during December nights.Humidity
In Menlo, the average relative humidity in December is 79%.Rainfall
In Menlo, in December, it is raining for 4.1 days, with typically 0.67" (17mm) of accumulated precipitation. In Menlo, Iowa, during the entire year, the rain falls for 117.3 days and collects up to 19.09" (485mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Menlo, during December, snow falls for 6 days and regularly aggregates up to 1.3" (33mm) of snow. In Menlo, during the entire year, snow falls for 31.7 days and aggregates up to 9.29" (236mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:25 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:43 am and sunset at 4:57 pm CST.
Sunshine
In December, the average sunshine is 4.8h.UV index
The months with the lowest UV index in Menlo are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 1 in December translates into this advice:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Menlo, IA
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in December: 21.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in December
Menlo, 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 (29.88"Hg).
Average wind speed in December
Menlo, IA
- Average wind speed in December: 10.3mph
The windiest months (with the highest average wind speed) are January and February (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Menlo, IA
- Average humidity in December: 79%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Menlo, IA
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is June (3.11").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Menlo, IA
- Average rainfall days in December: 4.1 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in December
Menlo, IA
- Average snowfall in December: 1.3"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Menlo, IA
- Average snowfall days in December: 6 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Menlo, IA
- Average daylight in December: 9h and 12min
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 48min
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 18min).
Average sunshine days in December
Menlo, IA
- Average sunshine days in December: 22 days
The month with the most sunshine days is December (22 days).
The month with the least sunshine days is May (12.1 days).
Average UV index in December
Menlo, IA
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Menlo, IA
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in December
Menlo, IA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
