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
Start of December brings a shift in the average high-temperature, falling from November's cool 50.2°F (10.1°C) to a wintry 41.2°F (5.1°C). Steelton anticipates an average minimum temperature of 29.8°F (-1.2°C) in the month of December.Humidity
The average relative humidity in December in Steelton, Pennsylvania, is 79%.Rainfall
In Steelton, during December, the rain falls for 10.5 days and regularly aggregates up to 1.38" (35mm) of precipitation. Throughout the year, in Steelton, there are 146 rainfall days, and 19.53" (496mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Steelton. In Steelton, in December, during 4.5 snowfall days, 1.06" (27mm) of snow is typically accumulated. Throughout the year, in Steelton, there are 23.2 snowfall days, and 8.39" (213mm) of snow is accumulated.Daylight
December has the shortest days of the year in Steelton, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:11 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:51 pm EST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index in Steelton are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
How cold does it get in Steelton in December?
What is the average humidity in December in Steelton?
How much does it rain in Steelton in December?
How much does it snow in Steelton in December?
What is the month with the shortest days in Steelton?
What is the average length of the day in December in Steelton?
When are sunrise and sunset in December in Steelton?
How long on average sun shines in December in Steelton?
When is the lowest UV index in Steelton?
What is the UV index intensity in December in Steelton?
Average temperature in December
Steelton, PA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).
Average pressure in December
Steelton, PA
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Steelton, PA
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Steelton, PA
- Average humidity in December: 79%
The months with the highest relative humidity are February and May (80%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Steelton, PA
- Average rainfall in December: 1.38"
The wettest months (with the highest rainfall) are May and August (2.09").
The driest months (with the least rainfall) are January and September (1.3").
Average rainfall days in December
Steelton, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
Steelton, PA
- Average snowfall in December: 1.06"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Steelton, PA
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Steelton, 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: 4h and 4min
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 30min).
Average sunshine days in December
Steelton, PA
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12 days).
Average UV index in December
Steelton, PA
- Average UV index in December: 2
The months with the highest UV index are May, June and July (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
Steelton, PA
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Steelton, PA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Steelton, Pennsylvania, USA
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