December weather forecastRoby, MO
December
Weather in December
The first month of the winter, December, is also a frosty month in Roby, Missouri, with an average temperature fluctuating between 43.5°F (6.4°C) and 29.5°F (-1.4°C).Temperature
The onset of December coincides with a reduction in the average high-temperature, falling from a cool 53.8°F (12.1°C) in November to a frosty 43.5°F (6.4°C). In December, the temperature drops to an average of 29.5°F (-1.4°C) at night.Humidity
In December, the average relative humidity is 76%.Rainfall
In Roby, Missouri, in December, during 7.5 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In Roby, during the entire year, the rain falls for 148.9 days and collects up to 32.4" (823mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. In Roby, in December, during 3.9 snowfall days, 1.81" (46mm) of snow is typically accumulated. Throughout the year, there are 20.1 snowfall days, and 9.96" (253mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:05 am and sunset at 4:50 pm. On the last day of December, sunrise is at 7:23 am and sunset at 5:00 pm CST.
Sunshine
The average sunshine in December in Roby, Missouri, is 5.2h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Roby, MO
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in December: 29.5°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in December
Roby, MO
- 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 (29.93"Hg).
Average wind speed in December
Roby, MO
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in December
Roby, MO
- Average humidity in December: 76%
The months with the highest relative humidity are March and May (77%).
The months with the lowest relative humidity are August, September and October (73%).
Average rainfall in December
Roby, MO
- Average rainfall in December: 2.01"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in December
Roby, MO
- Average rainfall days in December: 7.5 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (7 days).
Average snowfall in December
Roby, MO
- Average snowfall in December: 1.81"
The month with the highest snowfall is February (3.43").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Roby, MO
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Roby, MO
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Roby, MO
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in December
Roby, MO
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Roby, MO
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Roby, MO
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
