December weather forecastMattson, MS
December
Weather in December
December, the first month of the winter in Mattson, is also a fresh month, with an average temperature varying between 53.4°F (11.9°C) and 41°F (5°C).Temperature
December heralds a minor drop in average high-temperature, sliding from November's comfortable 61.7°F (16.5°C) to a cool 53.4°F (11.9°C). Mattson's average low-temperature in the month of December is recorded at a wintry 41°F (5°C).Humidity
February, March and December, with an average relative humidity of 78%, are the most humid months in Mattson.Rainfall
In Mattson, in December, during 12.3 rainfall days, 4.25" (108mm) of precipitation is typically accumulated. In Mattson, during the entire year, the rain falls for 161.1 days and collects up to 42.24" (1073mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Mattson. In Mattson, Mississippi, in December, snow falls for 0.3 days, with typically accumulated 0.04" (1mm) of snow. Throughout the year, in Mattson, Mississippi, there are 3.3 snowfall days, and 1.38" (35mm) of snow is accumulated.Daylight
With an average of 9h and 54min of daylight, December has the shortest days of the year.On the first day of December in Mattson, sunrise is at 6:50 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:03 pm CST.
Sunshine
In Mattson, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index in Mattson, Mississippi, are January, February and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 3 in December converts into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mattson, MS
- Average high temperature in December: 53.4°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (50.2°F).
- Average low temperature in December: 41°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in December
Mattson, MS
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Mattson, MS
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Mattson, MS
- Average humidity in December: 78%
The months with the highest relative humidity are February, March and December (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in December
Mattson, MS
- Average rainfall in December: 4.25"
The wettest month (with the highest rainfall) is April (4.72").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Mattson, MS
- Average rainfall days in December: 12.3 days
The months with the highest number of rainy days are July and August (17.6 days).
The month with the least rainy days is October (9.3 days).
Average snowfall in December
Mattson, MS
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Mattson, MS
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Mattson, MS
- Average daylight in December: 9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in December
Mattson, MS
- Average sunshine days in December: 16.4 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is August (11.1 days).
Average UV index in December
Mattson, MS
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in December
Mattson, MS
- Average cloud cover in December: 46
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in December
Mattson, MS
- 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).
