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 moderate decline in the average high-temperature is seen during December, decreasing from a chilly 45°F (7.2°C) in November to a wintry 34.7°F (1.5°C). Nighttime temperatures record an average of 27.7°F (-2.4°C) throughout December.Humidity
The average relative humidity in December is 82%.Rainfall
In December, the rain falls for 8.6 days. Throughout December, 1.46" (37mm) of precipitation is accumulated. In Hannibal, during the entire year, the rain falls for 152.2 days and collects up to 19.69" (500mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In Hannibal, New York, during December, snow falls for 13.1 days and regularly aggregates up to 3.15" (80mm) of snow. In Hannibal, during the entire year, snow falls for 65.5 days and aggregates up to 15.47" (393mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:19 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 4:40 pm EST.
Sunshine
In Hannibal, New York, the average sunshine in December is 3h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: In December, an average UV index of 1 transforms into the following instructions:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
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 much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Hannibal have in December?
When is the lowest UV index in Hannibal?
What is the UV index intensity in December?
Average temperature in December
Hannibal, NY
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (75.4°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in December: 27.7°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Hannibal, 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 (29.92"Hg).
Average wind speed in December
Hannibal, NY
- Average wind speed in December: 12.2mph
The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in December
Hannibal, NY
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are September and November (77%).
Average rainfall in December
Hannibal, NY
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Hannibal, NY
- Average rainfall days in December: 8.6 days
The months with the highest number of rainy days are July and August (16.8 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in December
Hannibal, NY
- Average snowfall in December: 3.15"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Hannibal, NY
- Average snowfall days in December: 13.1 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Hannibal, NY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 2h and 36min).
Average sunshine days in December
Hannibal, NY
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is September (14.7 days).
The month with the least sunshine days is February (7 days).
Average UV index in December
Hannibal, 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
Hannibal, NY
- Average cloud cover in December: 72
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in December
Hannibal, 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).
Hannibal, New York, USA
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