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
In Lewis, entering December brings a temperature decrement, reducing from November's cold 41.5°F (5.3°C) to a subzero cold 30.6°F (-0.8°C). December's nights observe an average temperature of 19.9°F (-6.7°C).Humidity
In Lewis, the average relative humidity in December is 83%.Rainfall
In Lewis, New York, 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 are January through May, October through December. In December, it is snowing for 16 days. Throughout December, 6.57" (167mm) of snow is accumulated. In Lewis, during the entire year, snow falls for 85.1 days and aggregates up to 43.03" (1093mm) of snow.Daylight
December has the shortest days of the year in Lewis, with an average of 8h and 54min of daylight.On the first day of December, sunrise is at 7:10 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:25 pm EST.
Sunshine
In Lewis, New York, 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 vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 1 during December leads to these instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Frequently asked questions
How cold is it in Lewis in December?
What is the average humidity in December in Lewis?
How many days does it rain in December in Lewis?
How many days does it snow in December in Lewis?
What is the month with the shortest days in Lewis?
How many hours of daylight does Lewis have in December?
What time are sunrise and sunset in December in Lewis?
How long on average sun shines in December in Lewis?
When is the lowest UV index in Lewis?
What is the UV index intensity in December in Lewis?
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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