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
A moderate decline in the average high-temperature is seen during December, decreasing from a chilly 44.2°F (6.8°C) in November to a cold 34.3°F (1.3°C). Throughout December nights, Harford registers an average low-temperature of 24.6°F (-4.1°C).Humidity
The average relative humidity in December in Harford is 85%.Rainfall
In December, in Harford, Pennsylvania, the rain falls for 10.9 days. Throughout December, 2.36" (60mm) of precipitation is accumulated. In Harford, during the entire year, the rain falls for 163.7 days and collects up to 32.05" (814mm) of precipitation.Snowfall
Months with snowfall in Harford are January through May, October through December. In Harford, in December, during 15.5 snowfall days, 7.52" (191mm) of snow is typically accumulated. In Harford, during the entire year, snow falls for 80.1 days and aggregates up to 41.93" (1065mm) of snow.Daylight
December has the shortest days of the year in Harford, with an average of 9h and 12min of daylight.On the first day of December in Harford, sunrise is at 7:11 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 4:42 pm EST.
Sunshine
The average sunshine in December is 3.2h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 1 in December translates into these instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
How cold is it in Harford in December?
What is the average humidity in December in Harford?
How many days does it rain in December in Harford?
How much does it snow in Harford in December?
What is the month with the shortest days in Harford?
What is the average length of the day in December in Harford?
What time are sunrise and sunset in December in Harford?
How long on average sun shines in December in Harford?
When is the lowest UV index in Harford?
How high is the UV index in December in Harford?
Average temperature in December
Harford, PA
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Harford, PA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Harford, PA
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are January and February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Harford, PA
- Average humidity in December: 85%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is July (78%).
Average rainfall in December
Harford, PA
- Average rainfall in December: 2.36"
The wettest month (with the highest rainfall) is August (3.27").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in December
Harford, PA
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in December
Harford, PA
- Average snowfall in December: 7.52"
The month with the highest snowfall is February (10.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Harford, PA
- Average snowfall days in December: 15.5 days
The months with the highest number of snowfall days are January and February (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Harford, PA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in December: 3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).
Average sunshine days in December
Harford, PA
- Average sunshine days in December: 9.4 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Harford, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Harford, PA
- Average cloud cover in December: 68
The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in December
Harford, PA
- Average visibility in December: 5mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Harford, Pennsylvania, USA
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