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
Stepping into December, Rochester Mills observes a temperature decline, with the average high falling from November's chilly 46.2°F (7.9°C) to an icy 36.7°F (2.6°C). Rochester Mills experiences an average low-temperature of 25.7°F (-3.5°C) in the month of December.Humidity
The average relative humidity in December is 86%.Rainfall
In Rochester Mills, during December, the rain falls for 10.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 151.9 rainfall days, and 22.13" (562mm) of precipitation is accumulated.Snowfall
Months with snowfall in Rochester Mills are January through May, October through December. In December, in Rochester Mills, Pennsylvania, it is snowing for 14.6 days. Throughout December, 4.21" (107mm) of snow is accumulated. In Rochester Mills, during the entire year, snow falls for 71 days and aggregates up to 22.32" (567mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:21 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 4:58 pm EST.
Sunshine
In December, the average sunshine in Rochester Mills is 2.6h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Rochester Mills. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 1 during December translates into the following guidance:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
How cold is it in Rochester Mills in December?
What is the average humidity in December in Rochester Mills?
How many days does it rain in December in Rochester Mills?
How many days does it snow in December in Rochester Mills?
What is the month with the shortest days in Rochester Mills?
How many hours of daylight does Rochester Mills have in December?
What time are sunrise and sunset in December in Rochester Mills?
How many hours of sunshine does Rochester Mills have in December?
When is the lowest UV index in Rochester Mills?
What is the UV index reading in December in Rochester Mills?
Average temperature in December
Rochester Mills, PA
- Average high temperature in December: 36.7°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in December
Rochester Mills, 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 (29.95"Hg).
Average wind speed in December
Rochester Mills, PA
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in December
Rochester Mills, PA
- Average humidity in December: 86%
The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).
Average rainfall in December
Rochester Mills, PA
- Average rainfall in December: 1.73"
The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is November (1.26").
Average rainfall days in December
Rochester Mills, PA
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Rochester Mills, PA
- Average snowfall in December: 4.21"
The month with the highest snowfall is January (5.63").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Rochester Mills, PA
- Average snowfall days in December: 14.6 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Rochester Mills, 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 months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in December
Rochester Mills, PA
- Average sunshine days in December: 9.2 days
The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is February (7.8 days).
Average UV index in December
Rochester Mills, PA
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Rochester Mills, 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 39).
Average visibility in December
Rochester Mills, 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).
Rochester Mills, Pennsylvania, USA
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