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
Weather in December
Temperature
As December takes its course, Helensburgh's average high-temperature registers at an icy 5.5°C (41.9°F), closely aligning with the preceding month. In December, Helensburgh experiences a marginal drop in temperature, with averages of 2.3°C (36.1°F) at night.Humidity
The months with the highest humidity are January, August through December, with an average relative humidity of 89%.Rainfall
December is the month with the most rainfall in Helensburgh. Rain falls for 22.5 days and accumulates 116mm (4.57") of precipitation.Snowfall
January through April, November and December are months with snowfall in Helensburgh. In Helensburgh, in December, during 1.8 snowfall days, 12mm (0.47") of snow is typically accumulated. Throughout the year, in Helensburgh, United Kingdom, there are 10.8 snowfall days, and 115mm (4.53") of snow is accumulated.Sea temperature
In December, the average sea temperature is 9.7°C (49.5°F).Note: In 9.7°C (49.5°F), even brief exposure to 13°C (55.4°F) feels biting, and anything less than 10°C (50°F) risks cold shock and impaired breathing, considering one's health.
Daylight
The month with the shortest days in Helensburgh is December, with an average of 7h and 6min of daylight.On the first day of the month, sunrise is at 8:26 am and sunset at 3:49 pm. On the last day of December, sunrise is at 8:50 am and sunset at 3:54 pm GMT.
Sunshine
In December, the average sunshine is 3.1h.UV index
In Helensburgh, United Kingdom, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
Is December cold in Helensburgh?
What are the most humid months in Helensburgh?
What is the average humidity in December in Helensburgh?
What is the wettest month in Helensburgh?
How many days does it rain in December in Helensburgh?
How many days does it snow in December in Helensburgh?
What is the water temperature in December in Helensburgh?
What is the month with the shortest days in Helensburgh?
How many hours of daylight does Helensburgh have in December?
What time are sunrise and sunset in December in Helensburgh?
How many hours of sunshine does Helensburgh have in December?
What is the UV index intensity in December in Helensburgh?
Average temperature in December
Helensburgh, United Kingdom
- Average high temperature in December: 5.5°C
The warmest month (with the highest average high temperature) is July (16.3°C).
The month with the lowest average high temperature is January (5°C).
- Average low temperature in December: 2.3°C
The month with the highest average low temperature is July (9.8°C).
The coldest month (with the lowest average low temperature) is February (1.4°C).
Average pressure in December
Helensburgh, United Kingdom
- Average pressure in December: 1007.7mbar
The month with the highest atmospheric pressure is May (1015.2mbar).
The month with the lowest atmospheric pressure is November (1006.6mbar).
Average wind speed in December
Helensburgh, United Kingdom
- Average wind speed in December: 18.8km/h
The windiest month (with the highest average wind speed) is January (19.3km/h).
The calmest months (with the lowest average wind speed) are June and July (11.9km/h).
Average humidity in December
Helensburgh, United Kingdom
- Average humidity in December: 89%
The months with the highest relative humidity are January, August, September, October, November and December (89%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in December
Helensburgh, United Kingdom
- Average rainfall in December: 116mm
The wettest month (with the highest rainfall) is December (116mm).
The driest month (with the least rainfall) is April (48mm).
Average rainfall days in December
Helensburgh, United Kingdom
- Average rainfall days in December: 22.5 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is February (17.8 days).
Average snowfall in December
Helensburgh, United Kingdom
- Average snowfall in December: 12mm
The month with the highest snowfall is February (53mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in December
Helensburgh, United Kingdom
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is February (3.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in December
Helensburgh, United Kingdom
- Average sea temperature in December: 9.7°C
The best month for swimming (with the highest average sea temperature) is August (13.8°C).
The coldest month (with the lowest average sea temperature) is March (7.2°C).
Average daylight in December /
Average sunshine in December
Helensburgh, 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 1min
The month with the most sunshine is June (Average sunshine: 6h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 0min).
Average sunshine days in December
Helensburgh, United Kingdom
- Average sunshine days in December: 6.9 days
The month with the most sunshine days is April (8.8 days).
The months with the least sunshine days are July and August (5.4 days).
Average UV index in December
Helensburgh, United Kingdom
- Average UV index in December: 2
The months with the highest UV index are May and June (UV index 4).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Helensburgh, United Kingdom
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is April (Cloud cover 59).
Average visibility in December
Helensburgh, United Kingdom
- Average visibility in December: 8km
The months with the highest visibility are January, February, March, April, May and November (9km).
The months with the lowest visibility are June, July, August, September, October and December (8km).
Helensburgh, United Kingdom
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