December weather forecastPortland, IN
December
Weather in December
The first month of the winter, December, is also a wintry month in Portland, Indiana, with temperature in the range of an average low of 27.1°F (-2.7°C) and an average high of 37.6°F (3.1°C).Temperature
In Portland, entering December brings a temperature decrement, reducing from November's frosty 48.4°F (9.1°C) to a wintry 37.6°F (3.1°C). Portland, during the month of December, experiences an average low-temperature of 27.1°F (-2.7°C).Humidity
January, February and December, with an average relative humidity of 83%, are the most humid months.Rainfall
In December, the rain falls for 5.8 days. Throughout December, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 108.6 rainfall days, and 8.74" (222mm) of precipitation is accumulated.Snowfall
Months with snowfall in Portland are January through April, October through December. In Portland, Indiana, in December, during 6.5 snowfall days, 0.71" (18mm) of snow is typically accumulated. In Portland, during the entire year, snow falls for 32.7 days and aggregates up to 3.15" (80mm) of snow.Daylight
The month with the shortest days in Portland is December, with an average of 9h and 18min of daylight.On the first day of December in Portland, Indiana, sunrise is at 7:44 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 8:02 am and sunset at 5:23 pm EST.
Sunshine
In Portland, the average sunshine in December is 3.8h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index in Portland. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 1 in December transforms into the following instructions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Portland, 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 (20.1°F).
Average pressure in December
Portland, 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
Portland, IN
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Portland, IN
- Average humidity in December: 83%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Portland, IN
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in December
Portland, IN
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (13.9 days).
The months with the least rainy days are January and February (4.8 days).
Average snowfall in December
Portland, IN
- Average snowfall in December: 0.71"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Portland, IN
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Portland, IN
- Average daylight in December: 9h and 18min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Portland, IN
- Average sunshine days in December: 18.7 days
The months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in December
Portland, IN
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Portland, 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 July and August (Cloud cover 33).
Average visibility in December
Portland, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
