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
December is marked by a subtle drop in average high-temperatures, transitioning from a frosty 8.2°C (46.8°F) in November to a wintry 4°C (39.2°F). Throughout December, an average low-temperature of -1.7°C (28.9°F) is expected in Romont.Humidity
The average relative humidity in December is 84%.Rainfall
In December, the rain falls for 6.9 days. Throughout December, 23mm (0.91") of precipitation is accumulated. In Romont, during the entire year, the rain falls for 104.2 days and collects up to 215mm (8.46") of precipitation.Snowfall
Months with snowfall in Romont are January through May, October through December. In Romont, in December, snow falls for 3.2 days, with typically accumulated 14mm (0.55") of snow. In Romont, during the entire year, snow falls for 18.1 days and aggregates up to 90mm (3.54") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 07:56 and sunset at 16:46. On the last day of December, in Romont, Switzerland, sunrise is at 08:16 and sunset at 16:54 CET.
Sunshine
With an average of 5.1h of sunshine, December has the least sunshine of the year.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Romont. 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: The daily high UV index of 2 during December translates into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December in Romont?
What is the average humidity in December in Romont?
How much does it rain in Romont in December?
How many days does it snow in December in Romont?
What is the month with the shortest days in Romont?
How many hours of daylight does Romont have in December?
When are sunrise and sunset in December in Romont?
What is the month with the least sunshine in Romont?
How long on average sun shines in December in Romont?
What is the month with the lowest UV index in Romont?
How high is the UV index in December in Romont?
Average temperature in December
Romont, Switzerland
- Average high temperature in December: 4°C
The warmest months (with the highest average high temperature) are July and August (22.1°C).
The month with the lowest average high temperature is January (2.5°C).
- Average low temperature in December: -1.7°C
The month with the highest average low temperature is July (11.3°C).
The coldest month (with the lowest average low temperature) is January (-3.8°C).
Average pressure in December
Romont, Switzerland
- Average pressure in December: 1021.1mbar
The month with the highest atmospheric pressure is December (1021.1mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed in December
Romont, Switzerland
- Average wind speed in December: 10.7km/h
The windiest month (with the highest average wind speed) is February (11km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).
Average humidity in December
Romont, Switzerland
- Average humidity in December: 84%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and July (79%).
Average rainfall in December
Romont, Switzerland
- Average rainfall in December: 23mm
The wettest month (with the highest rainfall) is June (26mm).
The driest month (with the least rainfall) is September (8mm).
Average rainfall days in December
Romont, Switzerland
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (6.2 days).
Average snowfall in December
Romont, Switzerland
- Average snowfall in December: 14mm
The month with the highest snowfall is January (25mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in December
Romont, Switzerland
- Average snowfall days in December: 3.2 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Romont, Switzerland
- Average daylight in December: 8h and 4min
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 36min).
- Average sunshine in December: 5h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Romont, Switzerland
- Average sunshine days in December: 20.7 days
The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is May (15.8 days).
Average UV index in December
Romont, 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, March, November and December (UV index 2).
Average cloud cover in December
Romont, Switzerland
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Romont, Switzerland
- Average visibility in December: 9km
The months with the highest visibility are March, April, November and December (9km).
The months with the lowest visibility are January, February, May, June, July, August, September and October (8km).
