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 subtle change in temperatures is noted as November gives way to December, with average highs reducing from a fresh 52.5°F (11.4°C) to a frosty 44.8°F (7.1°C). Shirley in December experiences a minor decline in temperature, with an average low of 37°F (2.8°C) at night.Humidity
In Shirley, the average relative humidity in December is 74%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.8 days and typically aggregates up to 3.31" (84mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Shirley, during December, snow falls for 3.4 days and regularly aggregates up to 0.63" (16mm) of snow. In Shirley, during the entire year, snow falls for 17.9 days and aggregates up to 4.57" (116mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:33 pm EST.
Sunshine
In December, the average sunshine is 4.9h.UV index
The months with the lowest UV index in Shirley are January through March and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In December, the maximum UV index of 2 translates into these guidelines:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Shirley?
What is the average humidity in December in Shirley?
What is the rainiest month in Shirley?
How many days does it rain in December in Shirley?
How much does it snow in Shirley in December?
What is the month with the shortest days in Shirley?
What is the average length of the day in December in Shirley?
When are sunrise and sunset in December in Shirley?
How long on average sun shines in December in Shirley?
What is the month with the lowest UV index in Shirley?
What is the UV index reading in December in Shirley?
Average temperature in December
Shirley, NY
- Average high temperature in December: 44.8°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in December: 37°F
The months with the highest average low temperature are July and August (71.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in December
Shirley, 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 (29.93"Hg).
Average wind speed in December
Shirley, NY
- Average wind speed in December: 14mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest months (with the lowest average wind speed) are July and August (9.6mph).
Average humidity in December
Shirley, NY
- Average humidity in December: 74%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).
Average rainfall in December
Shirley, NY
- Average rainfall in December: 3.31"
The wettest month (with the highest rainfall) is December (3.31").
The driest months (with the least rainfall) are January, February and September (2.01").
Average rainfall days in December
Shirley, NY
- Average rainfall days in December: 12.8 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (9 days).
Average snowfall in December
Shirley, NY
- Average snowfall in December: 0.63"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Shirley, NY
- Average snowfall days in December: 3.4 days
The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Shirley, 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 months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Shirley, NY
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in December
Shirley, 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 and December (UV index 2).
Average cloud cover in December
Shirley, NY
- Average cloud cover in December: 49
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Shirley, 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).
Shirley, New York, USA
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