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
December
Weather in December
Temperature
During the shift to December, Costermano records a mild decrease in average high-temperature, moving from a fresh 11°C (51.8°F) in November to a frosty 6.7°C (44.1°F). Throughout December, the temperature falls to an average low of 1.4°C (34.5°F).Humidity
In December, the average relative humidity in Costermano is 72%.Rainfall
In December, in Costermano, the rain falls for 8.2 days. Throughout December, 40mm (1.57") of precipitation is accumulated. Throughout the year, in Costermano, there are 178.5 rainfall days, and 861mm (33.9") of precipitation is accumulated.Snowfall
January through March and December are months with snowfall in Costermano. December is the first month it typically snows in Costermano. Throughout December, in the average 0.8 snowfall days, it receives 10mm (0.39") of snow. In Costermano, during the entire year, snow falls for 3.4 days and aggregates up to 39mm (1.54") of snow.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of December, sunrise is at 07:37 and sunset at 16:34. On the last day of the month, sunrise is at 07:57 and sunset at 16:43 CET.
Sunshine
In Costermano, the average sunshine in December is 6.3h.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 2 in December transforms into this advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. When the Sun is at its strongest around midday, find shade and limit exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Costermano in December?
What is the average humidity in December in Costermano?
How many days does it rain in December in Costermano?
When does it start snowing in Costermano?
What is the month with the shortest days in Costermano?
What is the average length of the day in December in Costermano?
When are sunrise and sunset in December in Costermano?
How many hours of sunshine does Costermano have in December?
When is the lowest UV index in Costermano?
What is the UV index reading in December in Costermano?
Average temperature in December
Costermano, Italy
- Average high temperature in December: 6.7°C
The warmest month (with the highest average high temperature) is August (26.4°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in December: 1.4°C
The month with the highest average low temperature is August (17.8°C).
The coldest month (with the lowest average low temperature) is January (0.7°C).
Average pressure in December
Costermano, Italy
- Average pressure in December: 1019.8mbar
The month with the highest atmospheric pressure is December (1019.8mbar).
The month with the lowest atmospheric pressure is May (1014.6mbar).
Average wind speed in December
Costermano, Italy
- Average wind speed in December: 6.4km/h
The windiest month (with the highest average wind speed) is April (7.8km/h).
The calmest month (with the lowest average wind speed) is October (6.3km/h).
Average humidity in December
Costermano, Italy
- Average humidity in December: 72%
The month with the highest relative humidity is November (79%).
The month with the lowest relative humidity is August (71%).
Average rainfall in December
Costermano, Italy
- Average rainfall in December: 40mm
The wettest month (with the highest rainfall) is June (115mm).
The driest month (with the least rainfall) is January (29mm).
Average rainfall days in December
Costermano, Italy
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (21.3 days).
The month with the least rainy days is December (8.2 days).
Average snowfall in December
Costermano, Italy
- Average snowfall in December: 10mm
The month with the highest snowfall is February (15mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Costermano, Italy
- Average snowfall days in December: 0.8 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, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Costermano, Italy
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 6h and 2min
The months with the most sunshine are June and July (Average sunshine: 11h and 12min).
The months with the least sunshine are February and November (Average sunshine: 5h and 48min).
Average sunshine days in December
Costermano, Italy
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is July (3.2 days).
Average UV index in December
Costermano, Italy
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in December
Costermano, Italy
- Average cloud cover in December: 30
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Costermano, Italy
- Average visibility in December: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
