December weather forecastTonawanda, NY

December

Weather in December

December, the first month of the winter in Tonawanda, is also an icy month, with an average temperature ranging between min 27.7°F (-2.4°C) and max 35.6°F (2°C).

Temperature

The onset of December introduces a moderate change in Tonawanda's weather, with average high-temperatures falling from November's frosty 45.5°F (7.5°C) to an icy 35.6°F (2°C). December nights in Tonawanda cool to an average low-temperature of 27.7°F (-2.4°C), a marginal decrease from its daytime equivalent.

Humidity

In December, the average relative humidity is 83%.

Rainfall

In Tonawanda, during December, the rain falls for 10.5 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 169.2 rainfall days, and 28.15" (715mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Tonawanda, during December, snow falls for 15.5 days and regularly aggregates up to 5.24" (133mm) of snow. Throughout the year, there are 77.2 snowfall days, and 30.94" (786mm) of snow is accumulated.

Ocean temperature

In Tonawanda, New York, the average seawater temperature in December is 41.2°F (5.1°C).
Note: Taking a dip in 41.2°F (5.1°C) can be perilous. Submersion in temperatures under 50°F (10°C) triggers severe cold shock accompanied by hyperventilation.

Daylight

The month with the shortest days in Tonawanda is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:27 am and sunset at 4:41 pm. On the last day of December, in Tonawanda, New York, sunrise is at 7:46 am and sunset at 4:50 pm EST.

Sunshine

In Tonawanda, the average sunshine in December is 2.7h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum UV index of 1 in December translates into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.

Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature, in December, in Tonawanda, is 35.6°F (2°C), while the average low-temperature is 27.7°F (-2.4°C).

The average relative humidity in December is 83%.

In Tonawanda, New York, during December, the rain falls for 10.5 days and regularly aggregates up to 2.2" (56mm) of precipitation.

In Tonawanda, in December, during 15.5 snowfall days, 5.24" (133mm) of snow is typically accumulated.

In December, the average ocean temperature in Tonawanda is 41.2°F (5.1°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

With an average of 9h and 6min of daylight, December has the shortest days of the year in Tonawanda.

In Tonawanda, the average day length in December is 9h and 4min.

In December, on the first day of the month, sunrise is at 7:27 am and sunset at 4:41 pm. On the last day of the month, in Tonawanda, sunrise is at 7:46 am and sunset at 4:50 pm EST.

The average sunshine duration in December is 2.7h.

The months with the lowest UV index in Tonawanda, New York, are January, February and December, with an average maximum UV index of 1.

In December, the average daily maximum UV index in Tonawanda is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

45.5°F

35.6°F

29.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.7mph

11.7mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

7.2

15.5

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

8.2

6.3

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Tonawanda, NY

Average high temperature in December: 35.6°F

The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (29.3°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 (19.4°F).

Average pressure in December
Tonawanda, 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
Tonawanda, NY

Average wind speed in December: 10.1mph

The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

Average humidity in December
Tonawanda, NY

Average humidity in December: 83%

The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are July, August and September (74%).

Average rainfall in December
Tonawanda, NY

Average rainfall in December: 2.2"

The wettest month (with the highest rainfall) is May (2.87").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in December
Tonawanda, NY

Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (7.6 days).

Average snowfall in December
Tonawanda, NY

Average snowfall in December: 5.24"

The month with the highest snowfall is February (7.64").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
Tonawanda, NY

Average snowfall days in December: 15.5 days

The month with the highest number of snowfall days is January (19 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in December
Tonawanda, NY

Average sea temperature in December: 41.3°F

The best month for swimming (with the highest average sea temperature) is August (72.9°F).
The coldest month (with the lowest average sea temperature) is March (35.7°F).

Average daylight in December /
Average sunshine in December
Tonawanda, NY

Average daylight in December: 9h and 6min

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 6min).

Average sunshine in December: 2h and 42min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

Average sunshine days in December
Tonawanda, NY

Average sunshine days in December: 8.2 days

The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (6.3 days).

Average UV index in December
Tonawanda, 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, February and December (UV index 1).

Average cloud cover in December
Tonawanda, NY

Average cloud cover in December: 72

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in December
Tonawanda, NY

Average visibility in December: 5mi

The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).