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, a minor reduction in average high-temperature is observed, shifting from a fresh 10.7°C (51.3°F) in November to a chilly 6.6°C (43.9°F). Castellanza records an average low of 1.3°C (34.3°F) throughout the nights in December.Humidity
The average relative humidity in December is 74%.Rainfall
In Castellanza, during December, the rain falls for 8.9 days and regularly aggregates up to 55mm (2.17") of precipitation. In Castellanza, during the entire year, the rain falls for 178.4 days and collects up to 1147mm (45.16") of precipitation.Snowfall
January through March, November and December are months with snowfall. In Castellanza, during December, snow falls for 2.5 days and regularly aggregates up to 37mm (1.46") of snow. Throughout the year, in Castellanza, there are 9.2 snowfall days, and 147mm (5.79") of snow is accumulated.Daylight
With an average of 8h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 07:44 and sunset at 16:42. On the last day of the month, sunrise is at 08:04 and sunset at 16:50 CET.
Sunshine
In Castellanza, the average sunshine in December is 6.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Castellanza. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Castellanza during December?
What is the average humidity in December in Castellanza?
How many days does it rain in December in Castellanza?
How many days does it snow in December in Castellanza?
What is the month with the shortest days in Castellanza?
What is the average length of the day in December in Castellanza?
When is the sunrise / sunset in December in Castellanza?
How long on average sun shines in December in Castellanza?
What is the month with the lowest UV index in Castellanza?
What is the UV index reading in December in Castellanza?
Average temperature in December
Castellanza, Italy
- Average high temperature in December: 6.6°C
The warmest month (with the highest average high temperature) is July (27.9°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in December: 1.3°C
The month with the highest average low temperature is August (17.7°C).
The coldest month (with the lowest average low temperature) is January (0.6°C).
Average pressure in December
Castellanza, Italy
- Average pressure in December: 1020.2mbar
The month with the highest atmospheric pressure is December (1020.2mbar).
The month with the lowest atmospheric pressure is April (1014.7mbar).
Average wind speed in December
Castellanza, Italy
- Average wind speed in December: 5.4km/h
The windiest month (with the highest average wind speed) is March (6.8km/h).
The calmest month (with the lowest average wind speed) is December (5.4km/h).
Average humidity in December
Castellanza, Italy
- Average humidity in December: 74%
The month with the highest relative humidity is November (79%).
The months with the lowest relative humidity are April, July and August (70%).
Average rainfall in December
Castellanza, Italy
- Average rainfall in December: 55mm
The wettest month (with the highest rainfall) is November (172mm).
The driest month (with the least rainfall) is January (33mm).
Average rainfall days in December
Castellanza, Italy
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in December
Castellanza, Italy
- Average snowfall in December: 37mm
The month with the highest snowfall is February (48mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Castellanza, Italy
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Castellanza, 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 1min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is November (Average sunshine: 5h and 6min).
Average sunshine days in December
Castellanza, Italy
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is December (19.5 days).
The month with the least sunshine days is June (5.9 days).
Average UV index in December
Castellanza, 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, February, November and December (UV index 2).
Average cloud cover in December
Castellanza, Italy
- Average cloud cover in December: 31
The month with the most cloud cover is November (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility in December
Castellanza, Italy
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
