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 sea temperature 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 brings a marginal elevation to a cold 5.5°C (41.9°F) from November's 7.5°C (45.5°F) in Dumbarton's average high-temperatures. A consistent average low-temperature of 1.9°C (35.4°F), with a minor variance from the daytime highs, is noted in Dumbarton during the nights of December.Humidity
The months with the highest humidity are November and December, with an average relative humidity of 90%.Rainfall
December is the month with the most rainfall. Rain falls for 21.8 days and accumulates 88mm (3.46") of precipitation.Snowfall
January through April, November and December are months with snowfall. In December, in Dumbarton, it is snowing for 2.5 days. Throughout December, 21mm (0.83") of snow is accumulated. Throughout the year, in Dumbarton, there are 13 snowfall days, and 127mm (5") of snow is accumulated.Sea temperature
In December, the average sea temperature in Dumbarton is 10°C (50°F).Note: Beware of 10°C (50°F) waters at 13°C (55.4°F), they're uninviting, and a dip below 10°C (50°F) has risks of breath loss and cold shock, contingent on health.
Daylight
With an average of 7h and 6min of daylight, December has the shortest days of the year in Dumbarton.On the first day of the month, sunrise is at 8:25 am and sunset at 3:49 pm. On the last day of December, sunrise is at 8:48 am and sunset at 3:53 pm GMT.
Sunshine
In December, the average sunshine in Dumbarton is 3.6h.UV index
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Dumbarton. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 2 in December, converts into the following recommendations:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Dumbarton during December?
What are the most humid months in Dumbarton?
What is the average humidity in December in Dumbarton?
What is the rainiest month in Dumbarton?
How much does it rain in Dumbarton in December?
How many days does it snow in December in Dumbarton?
How cold is the water in December in Dumbarton?
What is the month with the shortest days in Dumbarton?
How many hours of daylight does Dumbarton have in December?
When is the sunrise / sunset in December in Dumbarton?
How many hours of sunshine does Dumbarton have in December?
What is the month with the lowest UV index in Dumbarton?
How high is the UV index in December in Dumbarton?
Average temperature in December
Dumbarton, United Kingdom
- Average high temperature in December: 5.5°C
The warmest month (with the highest average high temperature) is July (16.8°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in December: 1.9°C
The month with the highest average low temperature is July (10°C).
The coldest months (with the lowest average low temperature) are January and February (1.4°C).
Average pressure in December
Dumbarton, United Kingdom
- Average pressure in December: 1007.9mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.7mbar).
Average wind speed in December
Dumbarton, United Kingdom
- Average wind speed in December: 18.2km/h
The windiest month (with the highest average wind speed) is January (18.6km/h).
The calmest month (with the lowest average wind speed) is July (12km/h).
Average humidity in December
Dumbarton, United Kingdom
- Average humidity in December: 90%
The months with the highest relative humidity are November and December (90%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in December
Dumbarton, United Kingdom
- Average rainfall in December: 88mm
The wettest month (with the highest rainfall) is December (88mm).
The driest month (with the least rainfall) is April (37mm).
Average rainfall days in December
Dumbarton, United Kingdom
- Average rainfall days in December: 21.8 days
The months with the highest number of rainy days are July and August (23 days).
The month with the least rainy days is February (17.3 days).
Average snowfall in December
Dumbarton, United Kingdom
- Average snowfall in December: 21mm
The month with the highest snowfall is February (49mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Dumbarton, United Kingdom
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Dumbarton, United Kingdom
- Average sea temperature in December: 10°C
The best month for swimming (with the highest average sea temperature) is August (14.3°C).
The coldest month (with the lowest average sea temperature) is March (7.4°C).
Average daylight in December /
Average sunshine in December
Dumbarton, United Kingdom
- Average daylight in December: 7h and 1min
The month with the longest days is June (Average daylight: 17h and 30min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in December: 3h and 4min
The month with the most sunshine is June (Average sunshine: 7h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in December
Dumbarton, United Kingdom
- Average sunshine days in December: 6.3 days
The month with the most sunshine days is March (9.4 days).
The month with the least sunshine days is July (5.3 days).
Average UV index in December
Dumbarton, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in December
Dumbarton, United Kingdom
- Average cloud cover in December: 65
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in December
Dumbarton, United Kingdom
- Average visibility in December: 8km
The months with the highest visibility are February, March, April and May (9km).
The months with the lowest visibility are January, June, July, August, September, October, November and December (8km).
