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 coincides with a soft drop in the average high-temperature, subtly decreasing from November's fresh 52°F (11.1°C) to a frosty 43.2°F (6.2°C). Morrisville, during December nights, observes an average temperature of 32°F (0°C).Humidity
In Morrisville, the average relative humidity in December is 77%.Rainfall
In Morrisville, during December, the rain falls for 11.2 days and regularly aggregates up to 3.15" (80mm) of precipitation. In Morrisville, during the entire year, the rain falls for 156.8 days and collects up to 31.81" (808mm) of precipitation.Snowfall
Months with snowfall in Morrisville are January through May, October through December. In Morrisville, Pennsylvania, in December, snow falls for 3 days, with typically accumulated 1.3" (33mm) of snow. In Morrisville, during the entire year, snow falls for 16.6 days and aggregates up to 8.86" (225mm) of snow.Daylight
The month with the shortest days in Morrisville, Pennsylvania, is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:02 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:43 pm EST.
Sunshine
In December, the average sunshine in Morrisville is 5h.UV index
The months with the lowest UV index in Morrisville are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
Is it cold in Morrisville during December?
What is the average humidity in December in Morrisville?
How many days does it rain in December in Morrisville?
How much does it snow in Morrisville in December?
What is the month with the shortest days in Morrisville?
What is the average length of the day in December in Morrisville?
When are sunrise and sunset in December in Morrisville?
How long on average sun shines in December in Morrisville?
What is the month with the lowest UV index in Morrisville?
How high is the UV index in December in Morrisville?
Average temperature in December
Morrisville, PA
- Average high temperature in December: 43.2°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 (36.9°F).
- Average low temperature in December: 32°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Morrisville, PA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Morrisville, PA
- Average wind speed in December: 7.7mph
The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Morrisville, PA
- Average humidity in December: 77%
The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Morrisville, PA
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Morrisville, PA
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in December
Morrisville, PA
- Average snowfall in December: 1.3"
The month with the highest snowfall is March (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Morrisville, PA
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Morrisville, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Morrisville, PA
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in December
Morrisville, PA
- 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, March, November and December (UV index 2).
Average cloud cover in December
Morrisville, PA
- Average cloud cover in December: 47
The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Morrisville, PA
- 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).
Morrisville, Pennsylvania, USA
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