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
Setting in of December comes with a decrease in the average high-temperature, moving from an icy 41.5°F (5.3°C) in November to a freezing cold 30.6°F (-0.8°C). In Lewis, the expected average low-temperature for December is 19.9°F (-6.7°C).Humidity
In Lewis, the average relative humidity in December is 83%.Rainfall
In Lewis, during December, the rain falls for 13.1 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Lewis, during the entire year, the rain falls for 176.9 days and collects up to 28.27" (718mm) of precipitation.Snowfall
Months with snowfall in Lewis are January through May, October through December. In Lewis, New York, in December, snow falls for 16 days, with typically accumulated 6.57" (167mm) of snow. Throughout the year, there are 85.1 snowfall days, and 43.03" (1093mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:10 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:29 am and sunset at 4:25 pm EST.
Sunshine
The average sunshine in December is 4.1h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
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 long on average sun shines in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Lewis, NY
- Average high temperature in December: 30.6°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in December: 19.9°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in December
Lewis, NY
- Average pressure in December: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Lewis, NY
- Average wind speed in December: 5.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Lewis, NY
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is May (75%).
Average rainfall in December
Lewis, NY
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in December
Lewis, NY
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is February (10.4 days).
Average snowfall in December
Lewis, NY
- Average snowfall in December: 6.57"
The month with the highest snowfall is February (12.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lewis, NY
- Average snowfall days in December: 16 days
The month with the highest number of snowfall days is January (19.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lewis, 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 54min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in December
Lewis, NY
- Average sunshine days in December: 10 days
The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in December
Lewis, NY
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Lewis, NY
- Average cloud cover in December: 59
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in December
Lewis, NY
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Lewis, New York, USA
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