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 fresh 51.8°F (11°C) to an icy 42.3°F (5.7°C). The average temperature during December nights dips to a subzero cold 30.9°F (-0.6°C).Humidity
The average relative humidity in December is 79%.Rainfall
In Washington, during December, the rain falls for 10.4 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Washington, during the entire year, the rain falls for 153.1 days and collects up to 31.02" (788mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Washington, in December, snow falls for 5.5 days, with typically accumulated 1.42" (36mm) of snow. In Washington, during the entire year, snow falls for 24.8 days and aggregates up to 6.65" (169mm) of snow.Daylight
The month with the shortest days in Washington, Indiana, is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:48 am and sunset at 5:27 pm. On the last day of December, sunrise is at 8:06 am and sunset at 5:37 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 4.5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. It's recommended to limit sun exposure when its radiation is at its peak during midday. Stay sun-safe with clothing that is both closely woven and worn loosely. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is December cold in Washington?
What is the average humidity in December in Washington?
How much does it rain in Washington in December?
How many days does it snow in December in Washington?
What is the month with the shortest days in Washington?
What is the average length of the day in December in Washington?
What time are sunrise and sunset in December in Washington?
What is the month with the least sunshine in Washington?
How long on average sun shines in December in Washington?
What is the month with the lowest UV index in Washington?
What is the UV index reading in December in Washington?
Average temperature in December
Washington, IN
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37°F).
- Average low temperature in December: 30.9°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in December
Washington, IN
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Washington, IN
- Average wind speed in December: 8.4mph
The windiest month (with the highest average wind speed) is February (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in December
Washington, IN
- Average humidity in December: 79%
The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Washington, IN
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is April (3.98").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
Washington, IN
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in December
Washington, IN
- Average snowfall in December: 1.42"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Washington, IN
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Washington, IN
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in December
Washington, IN
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is May (10.5 days).
Average UV index in December
Washington, IN
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Washington, IN
- Average cloud cover in December: 52
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Washington, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Washington, Indiana, USA
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