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
With December's arrival, Roby sees a decrease in average high-temperatures, moving from a cool 53.8°F (12.1°C) in November to a frosty 43.5°F (6.4°C). Roby witnesses an average low-temperature of 29.5°F (-1.4°C) throughout the month of December.Humidity
In December, the average relative humidity is 76%.Rainfall
In Roby, during December, the rain falls for 7.5 days and regularly aggregates up to 2.01" (51mm) of precipitation. Throughout the year, in Roby, there are 148.9 rainfall days, and 32.4" (823mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Roby. In December, it is snowing for 3.9 days. Throughout December, 1.81" (46mm) of snow is accumulated. In Roby, during the entire year, snow falls for 20.1 days and aggregates up to 9.96" (253mm) of snow.Daylight
The month with the shortest days is December, 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, in Roby, Missouri, sunrise is at 7:23 am and sunset at 5:00 pm CST.
Sunshine
The average sunshine in December 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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
How cold is December in Roby?
What is the average humidity in December in Roby?
How many days does it rain in December in Roby?
How many days does it snow in December in Roby?
What is the month with the shortest days in Roby?
How many hours of daylight does Roby have in December?
What time are sunrise and sunset in December in Roby?
How long on average sun shines in December in Roby?
When is the lowest UV index in Roby?
What is the UV index reading in December in Roby?
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 4min
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 1min
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).
Roby, Missouri, USA
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