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 involves a decrease in temperature, down from a frosty 48°F (8.9°C) in November to a wintry 37.9°F (3.3°C). In December, the temperature drops to an average of 26.1°F (-3.3°C) at night.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 82%.Rainfall
In Slate Hill, during December, the rain falls for 8.8 days and regularly aggregates up to 2.36" (60mm) of precipitation. Throughout the year, there are 139 rainfall days, and 25.28" (642mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Slate Hill, New York, in December, during 5.4 snowfall days, 3.19" (81mm) of snow is typically accumulated. Throughout the year, there are 28.4 snowfall days, and 16.46" (418mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 12min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:38 pm EST.
Sunshine
In Slate Hill, the average sunshine in December is 4.5h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In December, a regular UV index of 2 translates into these guidelines:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Experience reduced UV exposure by about half when donning a wide-brim hat. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Slate Hill have in December?
What is the month with the lowest UV index in Slate Hill?
What is the UV index reading in December?
Average temperature in December
Slate Hill, NY
- Average high temperature in December: 37.9°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Slate Hill, 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
Slate Hill, NY
- Average wind speed in December: 6.4mph
The windiest months (with the highest average wind speed) are January, February and March (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in December
Slate Hill, NY
- Average humidity in December: 82%
The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Slate Hill, NY
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is July (2.68").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in December
Slate Hill, NY
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in December
Slate Hill, NY
- Average snowfall in December: 3.19"
The month with the highest snowfall is February (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Slate Hill, NY
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is February (7.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Slate Hill, NY
- 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: 4h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Slate Hill, NY
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in December
Slate Hill, NY
- Average UV index in December: 2
The month with the highest UV index is June (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
Slate Hill, NY
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 37).
Average visibility in December
Slate Hill, NY
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Slate Hill, New York, USA
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