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's arrival correlates with a reduction in the average high-temperature, down from a cool 52.7°F (11.5°C) in November to a frosty 43.7°F (6.5°C). Garrison experiences an average low-temperature of 32.4°F (0.2°C) in the month of December.Humidity
In Garrison, the average relative humidity in December is 77%.Rainfall
In Garrison, in December, it is raining for 11.4 days, with typically 2.83" (72mm) of accumulated precipitation. In Garrison, Maryland, during the entire year, the rain falls for 167.8 days and collects up to 34.53" (877mm) of precipitation.Snowfall
Months with snowfall in Garrison are January through April, November and December. In Garrison, in December, during 3.9 snowfall days, 1.69" (43mm) of snow is typically accumulated. Throughout the year, there are 21 snowfall days, and 10.91" (277mm) of snow is accumulated.Daylight
The month with the shortest days in Garrison is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine in Garrison, Maryland, is 5.2h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 2 in December translates into these instructions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
How cold does it get in Garrison in December?
What is the average humidity in December in Garrison?
How much does it rain in Garrison in December?
How many days does it snow in December in Garrison?
What is the month with the shortest days in Garrison?
How many hours of daylight does Garrison have in December?
When is the sunrise / sunset in December in Garrison?
How long on average sun shines in December in Garrison?
What is the month with the lowest UV index in Garrison?
How high is the UV index in December in Garrison?
Average temperature in December
Garrison, MD
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 32.4°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in December
Garrison, MD
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Garrison, MD
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Garrison, MD
- Average humidity in December: 77%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are April and July (73%).
Average rainfall in December
Garrison, MD
- Average rainfall in December: 2.83"
The wettest month (with the highest rainfall) is August (4.37").
The driest months (with the least rainfall) are January and February (2.28").
Average rainfall days in December
Garrison, MD
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Garrison, MD
- Average snowfall in December: 1.69"
The month with the highest snowfall is March (3.39").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Garrison, MD
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Garrison, 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 5h and 0min).
Average sunshine days in December
Garrison, MD
- Average sunshine days in December: 16.5 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in December
Garrison, MD
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Garrison, MD
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Garrison, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Garrison, Maryland, USA
Weather forecast for your location
2. Allow the app to use your location
