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
Janney's December weather comes with a decrease in average high-temperatures, moving from a frosty 48.2°F (9°C) in November to an icy 37.6°F (3.1°C). Janney, during the month of December, experiences an average low-temperature of 27.1°F (-2.7°C).Humidity
In December, the average relative humidity in Janney, Indiana, is 82%.Rainfall
In December, in Janney, the rain falls for 8.9 days. Throughout December, 2.09" (53mm) of precipitation is accumulated. In Janney, Indiana, during the entire year, the rain falls for 157.2 days and collects up to 29.72" (755mm) of precipitation.Snowfall
Months with snowfall in Janney are January through May, October through December. In December, in Janney, it is snowing for 9.6 days. Throughout December, 2.95" (75mm) of snow is accumulated. Throughout the year, in Janney, there are 44 snowfall days, and 13.5" (343mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:46 am and sunset at 5:16 pm. On the last day of December, in Janney, sunrise is at 8:04 am and sunset at 5:26 pm EST.
Sunshine
In Janney, the average sunshine in December is 3.8h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 1 during December morphs into the following directions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
Is December cold in Janney?
What is the average humidity in December in Janney?
How many days does it rain in December in Janney?
How much does it snow in Janney in December?
What is the month with the shortest days in Janney?
How many hours of daylight does Janney have in December?
When are sunrise and sunset in December in Janney?
How many hours of sunshine does Janney have in December?
When is the lowest UV index in Janney?
What is the UV index reading in December in Janney?
Average temperature in December
Janney, IN
- Average high temperature in December: 37.6°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 27.1°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Janney, IN
- Average pressure in December: 30.11"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Janney, IN
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Janney, IN
- Average humidity in December: 82%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Janney, IN
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in December
Janney, IN
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (7 days).
Average snowfall in December
Janney, IN
- Average snowfall in December: 2.95"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Janney, IN
- Average snowfall days in December: 9.6 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Janney, IN
- 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: 3h and 5min
The months with the most sunshine are June and July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Janney, IN
- Average sunshine days in December: 13.5 days
The months with the most sunshine days are October and November (16.5 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in December
Janney, IN
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Janney, IN
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are June, July and August (Cloud cover 34).
Average visibility in December
Janney, IN
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Janney, Indiana, USA
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