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
December comes with a decrease in the average high-temperature, falling from a chilly 45.7°F (7.6°C) in November to a wintry 35.1°F (1.7°C). Night temperatures during December in Waterloo stabilize at an average of 26.1°F (-3.3°C), closely mirroring the daytime temperatures.Humidity
The average relative humidity in December in Waterloo is 84%.Rainfall
In Waterloo, during December, the rain falls for 10.5 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Waterloo, New York, during the entire year, the rain falls for 163.3 days and collects up to 22.6" (574mm) of precipitation.Snowfall
Months with snowfall in Waterloo, New York, are January through May, October through December. In December, it is snowing for 14.9 days. Throughout December, 3.9" (99mm) of snow is accumulated. Throughout the year, in Waterloo, there are 73.3 snowfall days, and 20.75" (527mm) of snow is accumulated.Daylight
December has the shortest days of the year in Waterloo, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:19 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:38 am and sunset at 4:43 pm EST.
Sunshine
In December, the average sunshine is 3.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 1 during December leads to these advisories:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Waterloo in December?
What is the average humidity in December in Waterloo?
How many days does it rain in December in Waterloo?
How many days does it snow in December in Waterloo?
What is the month with the shortest days in Waterloo?
How many hours of daylight does Waterloo have in December?
When are sunrise and sunset in December in Waterloo?
How many hours of sunshine does Waterloo have in December?
What is the month with the lowest UV index in Waterloo?
What is the UV index reading in December in Waterloo?
Average temperature in December
Waterloo, NY
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Waterloo, NY
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Waterloo, NY
- Average wind speed in December: 9.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Waterloo, NY
- Average humidity in December: 84%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (78%).
Average rainfall in December
Waterloo, NY
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is October (2.6").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in December
Waterloo, NY
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is February (7.7 days).
Average snowfall in December
Waterloo, NY
- Average snowfall in December: 3.9"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Waterloo, NY
- Average snowfall days in December: 14.9 days
The month with the highest number of snowfall days is January (18.9 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, NY
- Average daylight in December: 9h and 1min
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: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in December
Waterloo, NY
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is September (13.5 days).
The month with the least sunshine days is February (6.2 days).
Average UV index in December
Waterloo, NY
- 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
Waterloo, NY
- Average cloud cover in December: 69
The months with the most cloud cover are January and February (Cloud cover 73).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Waterloo, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Waterloo, New York, USA
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