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 sea temperature 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
The transition into December subtly indicates a reduction in the average high-temperature, down to a chilly 44.1°F (6.7°C) from November's fresh 52.9°F (11.6°C). Havre de Grace observes an average nighttime temperature of 32.9°F (0.5°C) during December.Humidity
The average relative humidity in December is 78%.Rainfall
In December, the rain falls for 9.4 days. Throughout December, 2.4" (61mm) of precipitation is accumulated. In Havre de Grace, during the entire year, the rain falls for 149.9 days and collects up to 29.41" (747mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Havre de Grace, in December, snow falls for 2.2 days, with typically accumulated 0.87" (22mm) of snow. In Havre de Grace, during the entire year, snow falls for 13.7 days and aggregates up to 7.05" (179mm) of snow.Ocean temperature
In Havre de Grace, the average seawater temperature in December is 49.3°F (9.6°C).Note: Immersing oneself in 49.3°F (9.6°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:06 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:50 pm EST.
Sunshine
The average sunshine in December is 5.1h.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 estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum high UV index of 2 in December translates into the following recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. During bright days, sunglasses that offer UVA and UVB defense are recommended. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is 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 water temperature in December?
What is the month with the shortest days?
How many hours of daylight does Havre de Grace have in December?
When is the sunrise / 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
Havre de Grace, MD
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Havre de Grace, MD
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Havre de Grace, MD
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Havre de Grace, MD
- Average humidity in December: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Havre de Grace, MD
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Havre de Grace, MD
- Average rainfall days in December: 9.4 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Havre de Grace, MD
- Average snowfall in December: 0.87"
The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Havre de Grace, MD
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Havre de Grace, MD
- Average sea temperature in December: 49.3°F
The best month for swimming (with the highest average sea temperature) is August (76.6°F).
The coldest month (with the lowest average sea temperature) is February (42.5°F).
Average daylight in December /
Average sunshine in December
Havre de Grace, 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 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Havre de Grace, MD
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in December
Havre de Grace, 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
Havre de Grace, MD
- Average cloud cover in December: 45
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Havre de Grace, 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).
Havre de Grace, Maryland, USA
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