December weather forecastCastro, Switzerland
December
Weather in December
December, the first month of the winter in Castro, is still a freezing cold month, with an average temperature varying between -10.8°C (12.6°F) and -2.9°C (26.8°F).Temperature
The start of December signals a gentle decrease in the average high-temperature, transitioning from a cold 0.6°C (33.1°F) in November to a subzero cold -2.9°C (26.8°F). Castro's temperature in December lowers to a consistent average of -10.8°C (12.6°F) during the nights.Humidity
The average relative humidity in December in Castro is 88%.Rainfall
In Castro, in December, it is raining for 7 days, with typically 124mm (4.88") of accumulated precipitation. In Castro, during the entire year, the rain falls for 200.1 days and collects up to 1619mm (63.74") of precipitation.Snowfall
January through May, September through December are months with snowfall in Castro. December is the month with the most snowfall in Castro. Snow falls for 18.5 days and accumulates 734mm (28.9") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 07:47 and sunset at 16:39. On the last day of December, sunrise is at 08:07 and sunset at 16:47 CET.
Sunshine
In December, the average sunshine is 4.1h.UV index
The months with the lowest UV index in Castro are January through April, November and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 1 in December transforms into this advice:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Castro, Switzerland
- Average high temperature in December: -2.9°C
The warmest month (with the highest average high temperature) is July (16.2°C).
The month with the lowest average high temperature is January (-3.9°C).
- Average low temperature in December: -10.8°C
The month with the highest average low temperature is July (6.3°C).
The coldest month (with the lowest average low temperature) is February (-12.7°C).
Average pressure in December
Castro, Switzerland
- Average pressure in December: 1020.8mbar
The month with the highest atmospheric pressure is December (1020.8mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in December
Castro, Switzerland
- Average wind speed in December: 10km/h
The windiest month (with the highest average wind speed) is December (10km/h).
The calmest month (with the lowest average wind speed) is August (7.1km/h).
Average humidity in December
Castro, Switzerland
- Average humidity in December: 88%
The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is July (82%).
Average rainfall in December
Castro, Switzerland
- Average rainfall in December: 124mm
The wettest month (with the highest rainfall) is August (205mm).
The driest month (with the least rainfall) is February (71mm).
Average rainfall days in December
Castro, Switzerland
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is July (27.2 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in December
Castro, Switzerland
- Average snowfall in December: 734mm
The month with the highest snowfall is December (734mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in December
Castro, Switzerland
- Average snowfall days in December: 18.5 days
The month with the highest number of snowfall days is January (20.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Castro, Switzerland
- Average daylight in December: 8h and 42min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 6min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is November (Average sunshine: 3h and 42min).
Average sunshine days in December
Castro, Switzerland
- Average sunshine days in December: 10.8 days
The month with the most sunshine days is October (12.1 days).
The month with the least sunshine days is July (2.3 days).
Average UV index in December
Castro, Switzerland
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 4).
The months with the lowest UV index are January, February, March, April, November and December (UV index 1).
Average cloud cover in December
Castro, Switzerland
- Average cloud cover in December: 58
The months with the most cloud cover are March and April (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 50).
Average visibility in December
Castro, Switzerland
- Average visibility in December: 7km
The months with the highest visibility are June and July (8km).
The months with the lowest visibility are January, February, March and April (5km).
