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
December signals a slight drop in average high-temperature, sliding from November's frosty 46.9°F (8.3°C) to a wintry 38.3°F (3.5°C). Swanton's average low-temperature for the month of December records at a subzero cold 26.8°F (-2.9°C).Humidity
The average relative humidity in December is 84%.Rainfall
In December, the rain falls for 12.3 days. Throughout December, 3.11" (79mm) of precipitation is accumulated. Throughout the year, in Swanton, Maryland, there are 185.7 rainfall days, and 35.39" (899mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Swanton, Maryland, in December, during 13 snowfall days, 6.26" (159mm) of snow is typically accumulated. In Swanton, during the entire year, snow falls for 64.2 days and aggregates up to 35.24" (895mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:18 am and sunset at 4:53 pm. On the last day of December, in Swanton, Maryland, sunrise is at 7:37 am and sunset at 5:03 pm EST.
Sunshine
The average sunshine in December is 3.7h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, a regular UV index of 1 translates into these guidelines:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Swanton have in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Swanton, MD
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in December
Swanton, MD
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Swanton, MD
- Average wind speed in December: 8.2mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in December
Swanton, MD
- Average humidity in December: 84%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).
Average rainfall in December
Swanton, MD
- Average rainfall in December: 3.11"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in December
Swanton, MD
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in December
Swanton, MD
- Average snowfall in December: 6.26"
The month with the highest snowfall is February (7.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Swanton, MD
- Average snowfall days in December: 13 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Swanton, MD
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in December
Swanton, MD
- Average sunshine days in December: 11.2 days
The month with the most sunshine days is November (14.5 days).
The month with the least sunshine days is May (6.9 days).
Average UV index in December
Swanton, MD
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Swanton, MD
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in December
Swanton, MD
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February and September (4mi).
Swanton, Maryland, USA
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