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
Rotterdam's weather changes with the onset of December, slightly falling from a frosty 45.5°F (7.5°C) in November to an icy 34.2°F (1.2°C). Throughout the month of December, the nighttime temperature in Rotterdam, New York, dips to an average of 24.6°F (-4.1°C).Humidity
The average relative humidity in December is 81%.Rainfall
In December, in Rotterdam, New York, the rain falls for 7.8 days. Throughout December, 2.05" (52mm) of precipitation is accumulated. In Rotterdam, during the entire year, the rain falls for 137.4 days and collects up to 25.75" (654mm) of precipitation.Snowfall
Months with snowfall in Rotterdam are January through May, October through December. In Rotterdam, New York, in December, snow falls for 6.4 days, with typically accumulated 5.24" (133mm) of snow. In Rotterdam, during the entire year, snow falls for 36.5 days and aggregates up to 22.56" (573mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:22 pm. On the last day of December, in Rotterdam, sunrise is at 7:26 am and sunset at 4:32 pm EST.
Sunshine
In Rotterdam, the average sunshine in December is 4.2h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Rotterdam, New York. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 1 in December converts into the following recommendations:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Frequently asked questions
How cold is December in Rotterdam?
What is the average humidity in December in Rotterdam?
How much does it rain in Rotterdam in December?
How many days does it snow in December in Rotterdam?
What is the month with the shortest days in Rotterdam?
How many hours of daylight does Rotterdam have in December?
What time are sunrise and sunset in December in Rotterdam?
How long on average sun shines in December in Rotterdam?
What is the month with the lowest UV index in Rotterdam?
What is the UV index reading in December in Rotterdam?
Average temperature in December
Rotterdam, NY
- Average high temperature in December: 34.2°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in December
Rotterdam, 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
Rotterdam, NY
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Rotterdam, NY
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Rotterdam, NY
- Average rainfall in December: 2.05"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (1.57").
Average rainfall days in December
Rotterdam, NY
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in December
Rotterdam, NY
- Average snowfall in December: 5.24"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rotterdam, NY
- Average snowfall days in December: 6.4 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rotterdam, 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: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in December
Rotterdam, NY
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is April (12.6 days).
Average UV index in December
Rotterdam, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Rotterdam, NY
- Average cloud cover in December: 55
The month with the most cloud cover is February (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Rotterdam, NY
- Average visibility in December: 6mi
The months with the highest visibility are April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May and September (5mi).
Rotterdam, New York, USA
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