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
With December's arrival, Waterloo's weather changes as the average high-temperature falls from a chilly 46.4°F (8°C) in November to a wintry 35.8°F (2.1°C). Throughout the month of December, the nighttime temperature in Waterloo dips to an average of 26.1°F (-3.3°C).Humidity
The average relative humidity in December in Waterloo, Indiana, is 84%.Rainfall
The months with the least rainfall are January and December Rain falls for 9.3 days and accumulates 1.34" (34mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Waterloo, in December, during 11.5 snowfall days, 2.09" (53mm) of snow is typically accumulated. In Waterloo, during the entire year, snow falls for 54.1 days and aggregates up to 13.43" (341mm) of snow.Daylight
December has the shortest days of the year in Waterloo, with an average of 9h and 12min of daylight.On the first day of the month, sunrise is at 7:47 am and sunset at 5:11 pm. On the last day of December, in Waterloo, sunrise is at 8:06 am and sunset at 5:20 pm EST.
Sunshine
In Waterloo, the average sunshine in December is 3.7h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high UV index of 1 in December translates into the following recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
How cold is it in Waterloo in December?
What is the average humidity in December in Waterloo?
What is the driest month in Waterloo?
How much does it rain in Waterloo in December?
How much does it snow in Waterloo in December?
What is the month with the shortest days in Waterloo?
What is the average length of the day in December in Waterloo?
What time are sunrise and sunset in December in Waterloo?
How many hours of sunshine does Waterloo have in December?
When is the lowest UV index in Waterloo?
What is the UV index reading in December in Waterloo?
Average temperature in December
Waterloo, IN
- Average high temperature in December: 35.8°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in December: 26.1°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 (18.5°F).
Average pressure in December
Waterloo, IN
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Waterloo, IN
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Waterloo, IN
- Average humidity in December: 84%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Waterloo, IN
- Average rainfall in December: 1.34"
The wettest month (with the highest rainfall) is May (3.11").
The driest months (with the least rainfall) are January and December (1.34").
Average rainfall days in December
Waterloo, IN
- Average rainfall days in December: 9.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Waterloo, IN
- Average snowfall in December: 2.09"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Waterloo, IN
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waterloo, IN
- Average daylight in December: 9h and 1min
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: 3h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Waterloo, IN
- Average sunshine days in December: 12.2 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is February (9.9 days).
Average UV index in December
Waterloo, IN
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Waterloo, IN
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in December
Waterloo, IN
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, February, August and September (5mi).
Waterloo, Indiana, USA
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