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
The onset of December results in a small decrease in the average high-temperature, moderately receding from a chilly 8.6°C (47.5°F) in November to an icy 4.4°C (39.9°F). During the month of December, the nighttime temperature falls to an average of -1.6°C (29.1°F).Humidity
In Letten, the average relative humidity in December is 87%.Rainfall
In Letten, in December, during 11.5 rainfall days, 51mm (2.01") of precipitation is typically accumulated. In Letten, during the entire year, the rain falls for 134.8 days and collects up to 471mm (18.54") of precipitation.Snowfall
January through May, October through December are months with snowfall. The month with the most snowfall in Letten is December, when snow falls for 6.6 days and typically aggregates up to 85mm (3.35") of snow.Daylight
The month with the shortest days in Letten is December, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 07:52 and sunset at 16:37. On the last day of December, in Letten, sunrise is at 08:13 and sunset at 16:44 CET.
Sunshine
January, February and December, with an average of 4.8h of sunshine, are months with the least sunshine in Letten.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. 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: A daily maximum UV index of 2 in December translates into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in Letten in December?
What is the average humidity in December in Letten?
How many days does it rain in December in Letten?
What is the snowiest month in Letten?
How much does it snow in Letten in December?
What is the month with the shortest days in Letten?
What is the average length of the day in December in Letten?
What time are sunrise and sunset in December in Letten?
What are the months with the least sunshine in Letten?
How long on average sun shines in December in Letten?
What is the month with the lowest UV index in Letten?
What is the UV index reading in December in Letten?
Average temperature in December
Letten, Switzerland
- Average high temperature in December: 4.4°C
The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (3.2°C).
- Average low temperature in December: -1.6°C
The months with the highest average low temperature are July and August (12.2°C).
The coldest month (with the lowest average low temperature) is January (-3.2°C).
Average pressure in December
Letten, 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 (1015.7mbar).
Average wind speed in December
Letten, Switzerland
- Average wind speed in December: 7.6km/h
The windiest month (with the highest average wind speed) is March (8.7km/h).
The calmest month (with the lowest average wind speed) is August (6km/h).
Average humidity in December
Letten, Switzerland
- Average humidity in December: 87%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is July (75%).
Average rainfall in December
Letten, Switzerland
- Average rainfall in December: 51mm
The wettest month (with the highest rainfall) is July (61mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in December
Letten, Switzerland
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (8 days).
Average snowfall in December
Letten, Switzerland
- Average snowfall in December: 85mm
The month with the highest snowfall is December (85mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Letten, Switzerland
- Average snowfall days in December: 6.6 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Letten, Switzerland
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The months with the least sunshine are January, February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Letten, Switzerland
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (13.6 days).
Average UV index in December
Letten, Switzerland
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Letten, Switzerland
- Average cloud cover in December: 51
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in December
Letten, Switzerland
- Average visibility in December: 8km
The months with the highest visibility are April, July and August (9km).
The month with the lowest visibility is January (7km).
