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
A moderate decline in the average high-temperature is seen during December, decreasing from a fresh 50°F (10°C) in November to an icy 40.1°F (4.5°C). Katonah's average low-temperature for the month of December records at a freezing cold 30.2°F (-1°C).Humidity
In Katonah, the average relative humidity in December is 77%.Rainfall
In Katonah, during December, the rain falls for 10 days and regularly aggregates up to 2.28" (58mm) of precipitation. In Katonah, during the entire year, the rain falls for 144.2 days and collects up to 22.32" (567mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Katonah. In December, in Katonah, it is snowing for 4.3 days. Throughout December, 1.65" (42mm) of snow is accumulated. In Katonah, during the entire year, snow falls for 23.1 days and aggregates up to 9.02" (229mm) of snow.Daylight
December has the shortest days of the year in Katonah, New York, with an average of 9h and 18min of daylight.On the first day of December in Katonah, sunrise is at 7:01 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:35 pm EST.
Sunshine
The average sunshine in December in Katonah is 4.9h.UV index
The months with the lowest UV index in Katonah are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
How cold is December in Katonah?
What is the average humidity in December in Katonah?
How much does it rain in Katonah in December?
How much does it snow in Katonah in December?
What is the month with the shortest days in Katonah?
What is the average length of the day in December in Katonah?
What time are sunrise and sunset in December in Katonah?
How many hours of sunshine does Katonah have in December?
What are the months with the lowest UV index in Katonah?
What is the UV index reading in December in Katonah?
Average temperature in December
Katonah, NY
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in December
Katonah, NY
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Katonah, NY
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Katonah, NY
- Average humidity in December: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Katonah, NY
- Average rainfall in December: 2.28"
The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is February (1.18").
Average rainfall days in December
Katonah, NY
- Average rainfall days in December: 10 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Katonah, NY
- Average snowfall in December: 1.65"
The month with the highest snowfall is March (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Katonah, NY
- Average snowfall days in December: 4.3 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Katonah, NY
- Average daylight in December: 9h and 2min
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 18min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Katonah, NY
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in December
Katonah, NY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Katonah, NY
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Katonah, NY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Katonah, New York, USA
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