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
The beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 47.1°F (8.4°C) in November to an icy 37.2°F (2.9°C). In the month of December, Petrolia's average low-temperature falls to a freezing cold 25.9°F (-3.4°C).Humidity
The average relative humidity in December in Petrolia is 86%.Rainfall
In Petrolia, Pennsylvania, during December, the rain falls for 8.2 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Petrolia, during the entire year, the rain falls for 140.7 days and collects up to 15.43" (392mm) of precipitation.Snowfall
Months with snowfall in Petrolia are January through May, November and December. In Petrolia, in December, during 9.5 snowfall days, 1.06" (27mm) of snow is typically accumulated. Throughout the year, in Petrolia, Pennsylvania, there are 48.2 snowfall days, and 6.85" (174mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:25 am and sunset at 4:51 pm. On the last day of December, sunrise is at 7:43 am and sunset at 5:00 pm EST.
Sunshine
In December, the average sunshine in Petrolia is 2.7h.UV index
The months with the lowest UV index in Petrolia are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: A typical high UV index of 1 in December suggests the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
How cold is December in Petrolia?
What is the average humidity in December in Petrolia?
How much does it rain in Petrolia in December?
How much does it snow in Petrolia in December?
What is the month with the shortest days in Petrolia?
How many hours of daylight does Petrolia have in December?
What time are sunrise and sunset in December in Petrolia?
How long on average sun shines in December in Petrolia?
When is the lowest UV index in Petrolia?
How high is the UV index in December in Petrolia?
Average temperature in December
Petrolia, PA
- Average high temperature in December: 37.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Petrolia, PA
- 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
Petrolia, PA
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in December
Petrolia, PA
- Average humidity in December: 86%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are April, June, July and August (78%).
Average rainfall in December
Petrolia, PA
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is November (0.87").
Average rainfall days in December
Petrolia, PA
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Petrolia, PA
- Average snowfall in December: 1.06"
The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Petrolia, PA
- Average snowfall days in December: 9.5 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Petrolia, PA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in December
Petrolia, PA
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is December (17.1 days).
The month with the least sunshine days is July (12.2 days).
Average UV index in December
Petrolia, 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
Petrolia, PA
- Average cloud cover in December: 72
The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in December
Petrolia, PA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
Petrolia, Pennsylvania, USA
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