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
As November transitions into December, Massena sees a drop in the average high-temperature, transitioning from a cold 42.1°F (5.6°C) to a subzero cold 29.7°F (-1.3°C). Massena usually reports an average low-temperature of 19.4°F (-7°C) during the month of December.Humidity
In December, the average relative humidity is 86%.Rainfall
In December, the rain falls for 10.2 days. Throughout December, 2.32" (59mm) of precipitation is accumulated. In Massena, during the entire year, the rain falls for 160.1 days and collects up to 29.76" (756mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In December, it is snowing for 13.1 days. Throughout December, 5.98" (152mm) of snow is accumulated. In Massena, during the entire year, snow falls for 70.6 days and aggregates up to 36.02" (915mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:19 pm. On the last day of December, sunrise is at 7:37 am and sunset at 4:28 pm EST.
Sunshine
The average sunshine in December is 3.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for average individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Massena have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Massena, NY
- Average high temperature in December: 29.7°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (23°F).
- Average low temperature in December: 19.4°F
The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in December
Massena, NY
- Average pressure in December: 30.04"Hg
The months with the highest atmospheric pressure are March and November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Massena, NY
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is February (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Massena, NY
- Average humidity in December: 86%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Massena, NY
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in December
Massena, NY
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in December
Massena, NY
- Average snowfall in December: 5.98"
The month with the highest snowfall is January (9.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Massena, NY
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is February (17.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Massena, NY
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in December
Massena, NY
- Average sunshine days in December: 11.6 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in December
Massena, NY
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Massena, NY
- Average cloud cover in December: 68
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Massena, NY
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Massena, New York, USA
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