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
As November transitions into December, Harrisonville sees a drop in the average high-temperature, transitioning from a cool 53.4°F (11.9°C) to a frosty 44.4°F (6.9°C). Throughout the month of December, Harrisonville witnesses an average temperature of 33.3°F (0.7°C).Humidity
In Harrisonville, the average relative humidity in December is 77%.Rainfall
In December, the rain falls for 7.7 days. Throughout December, 1.5" (38mm) of precipitation is accumulated. Throughout the year, there are 129 rainfall days, and 15.55" (395mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Harrisonville, in December, during 2 snowfall days, 0.28" (7mm) of snow is typically accumulated. In Harrisonville, during the entire year, snow falls for 12.3 days and aggregates up to 3.7" (94mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Harrisonville.On the first day of the month, sunrise is at 7:04 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:22 am and sunset at 4:48 pm EST.
Sunshine
In Harrisonville, 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 of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 2 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in 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?
What is the average length of the day in December in Harrisonville?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index in Harrisonville?
What is the UV index reading in December?
Average temperature in December
Harrisonville, NJ
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).
Average pressure in December
Harrisonville, NJ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Harrisonville, NJ
- Average wind speed in December: 8mph
The windiest months (with the highest average wind speed) are March and April (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in December
Harrisonville, NJ
- Average humidity in December: 77%
The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Harrisonville, NJ
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Harrisonville, NJ
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in December
Harrisonville, NJ
- Average snowfall in December: 0.28"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Harrisonville, NJ
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is January (3.6 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
Harrisonville, NJ
- 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Harrisonville, NJ
- Average sunshine days in December: 20.9 days
The months with the most sunshine days are November and December (20.9 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in December
Harrisonville, NJ
- 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
Harrisonville, NJ
- 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 30).
Average visibility in December
Harrisonville, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Harrisonville, New Jersey, USA
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