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 comes with a decrease in the average high-temperature, moving from a frosty 49.5°F (9.7°C) in November to a cold 39.9°F (4.4°C). Jonestown registers a consistent average low-temperature of 28.8°F (-1.8°C) during December.Humidity
In Jonestown, the average relative humidity in December is 80%.Rainfall
In Jonestown, during December, the rain falls for 11 days and regularly aggregates up to 2.68" (68mm) of precipitation. Throughout the year, there are 166.3 rainfall days, and 34.53" (877mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In December, in Jonestown, it is snowing for 5.9 days. Throughout December, 1.97" (50mm) of snow is accumulated. Throughout the year, there are 32.4 snowfall days, and 16.69" (424mm) of snow is accumulated.Daylight
The month with the shortest days in Jonestown is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:28 am and sunset at 4:49 pm EST.
Sunshine
The average sunshine in December in Jonestown is 4.4h.UV index
The months with the lowest UV index in Jonestown are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
How cold does it get in Jonestown in December?
What is the average humidity in December in Jonestown?
How much does it rain in Jonestown in December?
How many days does it snow in December in Jonestown?
What is the month with the shortest days in Jonestown?
How many hours of daylight does Jonestown have in December?
What time are sunrise and sunset in December in Jonestown?
How long on average sun shines in December in Jonestown?
When is the lowest UV index in Jonestown?
What is the UV index reading in December in Jonestown?
Average temperature in December
Jonestown, PA
- Average high temperature in December: 39.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.6°F).
- Average low temperature in December: 28.8°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in December
Jonestown, 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
Jonestown, PA
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Jonestown, PA
- Average humidity in December: 80%
The months with the highest relative humidity are February, May, June and October (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Jonestown, PA
- Average rainfall in December: 2.68"
The wettest months (with the highest rainfall) are May and July (3.58").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in December
Jonestown, PA
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in December
Jonestown, PA
- Average snowfall in December: 1.97"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Jonestown, PA
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Jonestown, 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 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in December
Jonestown, PA
- Average sunshine days in December: 14.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in December
Jonestown, PA
- Average UV index in December: 2
The month with the highest UV index is June (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
Jonestown, PA
- Average cloud cover in December: 53
The months with the most cloud cover are February and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in December
Jonestown, PA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, June, July and November (6mi).
The months with the lowest visibility are January, February, May, August, September, October and December (5mi).
Jonestown, Pennsylvania, USA
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