December weather forecast and climate
Swormville, NY

December, the first month of the winter, in Swormville, is still a cold month, with average temperature ranging between max 35.4°F (1.9°C) and min 27°F (-2.8°C).

Temperature

In Swormville, the average high-temperature decreases, from a frosty 45.5°F (7.5°C) in November, to a cold 35.4°F (1.9°C). In December, in Swormville, the average low-temperature is 27°F (-2.8°C).

Humidity

In December, the average relative humidity is 84%.

Rainfall

In Swormville, during 8.5 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, in Swormville, there are 139.2 rainfall days, and 14.84" (377mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In December, it is snowing for 13.2 days. Throughout December, 2.28" (58mm) of snow is accumulated. In Swormville, during the entire year, snow falls for 62.1 days, and aggregates up to 12.68" (322mm) of snow.

Daylight

With an average of 9.1h of daylight, December has the shortest days of the year in Swormville, New York.

Sunshine

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

UV index

Months with the lowest UV index in Swormville, New York, 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 unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 1 in December transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Swormville?

The average high-temperature, in December, in Swormville, New York, is 35.4°F (1.9°C), while the average low-temperature is 27°F (-2.8°C).

What is the average humidity in December in Swormville?

The average relative humidity in December is 84%.

How much does it rain in Swormville in December?

In Swormville, in December, it is raining for 8.5 days, with typically 1.22" (31mm) of accumulated precipitation.

How many days does it snow in December in Swormville?

In December, it is snowing for 13.2 days. Throughout December, 2.28" (58mm) of snow is accumulated.

What is the month with the shortest days in Swormville?

With an average of 9.1h of daylight, December has the shortest days of the year in Swormville.

What is the average length of the day in December in Swormville?

In Swormville, New York, the average length of the day in December is 9.1h.

How long on average sun shines in December in Swormville?

In December, the average sunshine in Swormville, New York, is 2.7h.

When is the lowest UV index in Swormville?

January, February and December, with an average maximum UV index of 1, are months with the lowest UV index in Swormville.

How high is the UV index in December in Swormville?

The average daily maximum UV index in December in Swormville is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.
Average temperature in December - Swormville, NY
  • Average high temperature in December: 1.9°C

The warmest month (with the highest average high temperature) is July (26.3°C).
The month with the lowest average high temperature is January (-1.5°C).

  • Average low temperature in December: -2.8°C

The month with the highest average low temperature is July (16.8°C).
The coldest month (with the lowest average low temperature) is January (-7.4°C).

Average pressure in December - Swormville, NY
  • Average pressure in December: 1017.9mbar

The month with the highest atmospheric pressure is November (1018.8mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in December - Swormville, NY
  • Average wind speed in December: 15.6km/h

The windiest month (with the highest average wind speed) is January (17.2km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).

Average humidity in December - Swormville, NY
  • Average humidity in December: 84%

Months with the highest relative humidity are January and February (86%).
Months with the lowest relative humidity are July and August (75%).

Average rainfall in December - Swormville, NY
  • Average rainfall in December: 31mm

The wettest month (with the highest rainfall) is July (41mm).
The driest month (with the least rainfall) is September (23mm).

Average rainfall days in December - Swormville, NY
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (6.4 days).

Average snowfall in December - Swormville, NY
  • Average snowfall in December: 58mm

Months with the highest snowfall are January and February (75mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - Swormville, NY
  • Average snowfall days in December: 13.2 days

The month with the highest number of snowfall days is January (15.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - Swormville, NY
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 2.7h

Months with the most sunshine are July and August (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 2.4h).

Average sunshine days in December - Swormville, NY
  • Average sunshine days in December: 12.3 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (10.2 days).

Average UV index in December - Swormville, NY
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February and December (UV index 1).

Average cloud cover in December - Swormville, 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 29).

Average visibility in December - Swormville, NY
  • Average visibility in December: 9km

Months with the highest visibility are April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February and March (8km).