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
The beginning of December marks a decrease in the average high-temperature, transitioning from a chilly 47.8°F (8.8°C) in November to an icy 36.5°F (2.5°C). Throughout the December nights, Melvin encounters a low-temperature of 27°F (-2.8°C).Humidity
In Melvin, the average relative humidity in December is 80%.Rainfall
February and December are months with the least rain in Melvin when the rain falls for 6.1 days and typically aggregates up to 0.75" (19mm) of rain.Snowfall
Months with snowfall are January through April, October through December. In December, it is snowing for 6.5 days. Throughout December, 0.83" (21mm) of snow is accumulated. In Melvin, during the entire year, snow falls for 29.4 days and aggregates up to 4.69" (119mm) of snow.Daylight
The month with the shortest days in Melvin is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:36 pm CST.
Sunshine
The average sunshine in December is 4.2h.UV index
With an average maximum UV index of 1, December is the month with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 1 in December suggests the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
What is the driest month?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Melvin have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December in Melvin?
Average temperature in December
Melvin, IL
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).
Average pressure in December
Melvin, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Melvin, IL
- Average wind speed in December: 10.4mph
The windiest month (with the highest average wind speed) is January (11mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Melvin, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Melvin, IL
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (1.93").
The driest months (with the least rainfall) are February and December (0.75").
Average rainfall days in December
Melvin, IL
- Average rainfall days in December: 6.1 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in December
Melvin, IL
- Average snowfall in December: 0.83"
The month with the highest snowfall is January (1.38").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Melvin, IL
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (9.3 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
Melvin, IL
- Average daylight in December: 9h and 2min
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: 4h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Melvin, IL
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in December
Melvin, IL
- 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
Melvin, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Melvin, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Melvin, Illinois, USA
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