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
During the transition into December, Waterloo observes a decrease in the average high-temperature, falling from a fresh 52.5°F (11.4°C) in November to a frosty 43.2°F (6.2°C). Waterloo experiences a mean temperature of 31.3°F (-0.4°C) during December nights.Humidity
In Waterloo, the average relative humidity in December is 81%.Rainfall
In Waterloo, in December, it is raining for 11.4 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 149 rainfall days, and 16.26" (413mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Waterloo, in December, snow falls for 6.5 days, with typically accumulated 1.1" (28mm) of snow. Throughout the year, there are 34 snowfall days, and 6.06" (154mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December in Waterloo, sunrise is at 7:29 am and sunset at 5:08 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 5:18 pm EST.
Sunshine
In Waterloo, the average sunshine in December is 4.1h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high UV index of 2 in December translates into the following recommendations:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is December in Waterloo?
What is the average humidity in December in Waterloo?
How many days does it rain in December in Waterloo?
How much does it snow in Waterloo in December?
What is the month with the shortest days in Waterloo?
How many hours of daylight does Waterloo have in December?
When is the sunrise / sunset in December in Waterloo?
How long on average sun shines in December in Waterloo?
What is the month with the lowest UV index in Waterloo?
What is the UV index intensity in December in Waterloo?
Average temperature in December
Waterloo, OH
- Average high temperature in December: 43.2°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 31.3°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Waterloo, OH
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Waterloo, OH
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Waterloo, OH
- Average humidity in December: 81%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
Waterloo, OH
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is November (0.83").
Average rainfall days in December
Waterloo, OH
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Waterloo, OH
- Average snowfall in December: 1.1"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Waterloo, OH
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Waterloo, OH
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Waterloo, OH
- Average sunshine days in December: 15.4 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in December
Waterloo, OH
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Waterloo, OH
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Waterloo, OH
- Average visibility in December: 5mi
The months with the highest visibility are April, June, August, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, September and December (5mi).
Waterloo, Ohio, USA
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