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 shift from November to December corresponds with a decrease in the average high-temperature, down to an icy 35.1°F (1.7°C) from a chilly 45.9°F (7.7°C). Petersham, in December, observes a steady average low-temperature of 24.1°F (-4.4°C).Humidity
The average relative humidity in December in Petersham is 80%.Rainfall
In Petersham, during December, the rain falls for 10.2 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Petersham, during the entire year, the rain falls for 145 days and collects up to 28.03" (712mm) of precipitation.Snowfall
Months with snowfall in Petersham are January through May, October through December. In Petersham, in December, during 8.1 snowfall days, 4.8" (122mm) of snow is typically accumulated. Throughout the year, in Petersham, Massachusetts, there are 43.1 snowfall days, and 25.75" (654mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:16 pm. On the last day of December, in Petersham, Massachusetts, sunrise is at 7:18 am and sunset at 4:25 pm EST.
Sunshine
The average sunshine in December is 4.7h.UV index
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high UV index of 2 in December translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. It's recommended to limit sun exposure when its radiation is at its peak during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
How cold is it in Petersham in December?
What is the average humidity in December in Petersham?
How much does it rain in Petersham in December?
How many days does it snow in December in Petersham?
What is the month with the shortest days in Petersham?
What is the average length of the day in December in Petersham?
What time are sunrise and sunset in December in Petersham?
How long on average sun shines in December in Petersham?
What is the month with the lowest UV index in Petersham?
What is the UV index intensity in December in Petersham?
Average temperature in December
Petersham, MA
- Average high temperature in December: 35.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in December
Petersham, MA
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Petersham, MA
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January, February and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Petersham, MA
- Average humidity in December: 80%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Petersham, MA
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is October (2.8").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Petersham, MA
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Petersham, MA
- Average snowfall in December: 4.8"
The month with the highest snowfall is February (6.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Petersham, MA
- Average snowfall days in December: 8.1 days
The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Petersham, MA
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Petersham, MA
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (13 days).
Average UV index in December
Petersham, MA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in December
Petersham, MA
- Average cloud cover in December: 48
The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Petersham, MA
- Average visibility in December: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Petersham, Massachusetts, USA
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