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
As December begins, there is a decrease in the average high-temperature, falling from a chilly 47.3°F (8.5°C) in November to a wintry 37.6°F (3.1°C). During December, Stillwater experiences a consistent low-temperature average of 27°F (-2.8°C).Humidity
In December, the average relative humidity is 82%.Rainfall
In Stillwater, during December, the rain falls for 12.4 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 166.3 rainfall days, and 31.06" (789mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Stillwater, during December, snow falls for 9.4 days and regularly aggregates up to 3.94" (100mm) of snow. In Stillwater, during the entire year, snow falls for 47.6 days and aggregates up to 22.91" (582mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year in Stillwater.On the first day of the month, sunrise is at 7:12 am and sunset at 4:37 pm. On the last day of December, in Stillwater, sunrise is at 7:30 am and sunset at 4:46 pm EST.
Sunshine
In December, the average sunshine in Stillwater is 4.1h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 1 in December suggests the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
How cold is December in Stillwater?
What is the average humidity in December in Stillwater?
How much does it rain in Stillwater in December?
How much does it snow in Stillwater in December?
What is the month with the shortest days in Stillwater?
How many hours of daylight does Stillwater have in December?
What time are sunrise and sunset in December in Stillwater?
How long on average sun shines in December in Stillwater?
What is the month with the lowest UV index in Stillwater?
How high is the UV index in December in Stillwater?
Average temperature in December
Stillwater, PA
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.8°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in December
Stillwater, PA
- Average pressure in December: 30.09"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
Stillwater, PA
- Average wind speed in December: 7.5mph
The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Stillwater, PA
- Average humidity in December: 82%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Stillwater, PA
- Average rainfall in December: 2.52"
The wettest months (with the highest rainfall) are April and May (2.99").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in December
Stillwater, PA
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Stillwater, PA
- Average snowfall in December: 3.94"
The month with the highest snowfall is January (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Stillwater, PA
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Stillwater, 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: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in December
Stillwater, PA
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is February (9.8 days).
Average UV index in December
Stillwater, 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
Stillwater, PA
- Average cloud cover in December: 58
The months with the most cloud cover are February and December (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in December
Stillwater, PA
- 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).
Stillwater, Pennsylvania, USA
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