Helensburgh in december: average Weather, Temperature and Climate
Weather in Helensburgh in december 2026
The weather in Helensburgh in december comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout december
very bad weather 69cm
Weather at 6am
40°F
Moderate rain at times
24% of time
21%
14%
14%
Weather at 12pm
43°F
Moderate rain at times
27% of time
21%
16%
14%
Weather at 6pm
41°F
Moderate rain at times
26% of time
19%
17%
14%
Weather at 3am
40°F
27%
16%
16%
15%
Evolution of daily average temperature and precipitation in Helensburgh in december
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Helensburgh in december.
The climate of Helensburgh in december is very bad
The weather in december in Helensburgh is wet (with 9.4in of precipitation over 14 days). The situation is deteriorating compared to the previous month since in november there is an average of 9.4in of rainfall over 12 days.
The climate is rather more than very fresh in that area this month. Do not forget to cover yourself! The thermometer averaged maximum of 45°F. The minimum is 40°F. Thus, the mean temperature average on this month of december in Helensburgh is 41°F. Note that these seasonal averages are in contrast with those observed in Helensburgh in december with a maximum record of 56°F in 2016 and a minimum record of 18°F in 2010. You can expect to have about 5 days with temperatures under 32°F, or 16% of the month.
On average, in Helensburgh, the days of december last 07:00. The sun rises at 08:44 and sets at 15:44.
Seasonal average climate and temperature of Helensburgh in december
Check below seasonal norms These datas are compiled from the weather statements earlier years of december.
| December | |||||
| Outside temperature | |||||
| Average temperature | 41°F | ||||
| Highest temperature | 45°F | ||||
| Lowest temperature | 40°F | ||||
| Highest record temperature | 56°F (2016) | ||||
| Lowest record temperature | 18°F (2010) | ||||
| Number of days at -32°F | 5 day(s) (16%) | ||||
| Sea temperature | |||||
| Average sea temperature | 50°F | ||||
| Lowest sea temperature | 47°F | ||||
| Highest sea temperature | 52°F | ||||
| Wind | |||||
| Wind speed | 22km/h | ||||
| Wind temperature | 34°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 9.4in | ||||
| Number of days with rainfall | 14 day(s) (44%) | ||||
| Record daily rainfall | 3.6in (2015) | ||||
| Snowfall | 69cm | ||||
| Other climate data | |||||
| Humidity | 92% | ||||
| Visibility | 7.87km | ||||
| Cloud cover | 69% | ||||
| UV index | 2 | ||||
| Daily sunshine hours | 5 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 08:44 | ||||
| Time of sunset | 15:44 | ||||
| Length of day | 07:00 | ||||
| Our opinion about the weather in december | |||||
| Our opinion at whereandwhen.net | very bad | ||||
How was the weather last december?
Here is the day by day recorded weather in Helensburgh in december 2025:
43°F to 45°F
41°F to 43°F
41°F to 45°F
41°F to 43°F
34°F to 40°F
40°F to 45°F
43°F to 47°F
45°F to 47°F
43°F to 54°F
47°F to 49°F
45°F to 50°F
38°F to 45°F
40°F to 47°F
50°F to 52°F
41°F to 47°F
38°F to 41°F
41°F to 49°F
41°F to 45°F
41°F to 45°F
41°F to 45°F
38°F to 41°F
45°F to 47°F
43°F to 47°F
40°F to 43°F
34°F to 40°F
34°F to 40°F
32°F to 38°F
32°F to 38°F
32°F to 36°F
32°F to 36°F
32°F to 43°F
Map: other cities in Scotland in december
Cities near Helensburgh:
| Greenock in december | very bad weather |
| Gourock in december | very bad weather |
| Dumbarton in december | very bad weather |
| Dunoon in december | very bad weather |
| Largs in december | very bad weather |
| Paisley in december | very bad weather |
| Rothesay in december | very bad weather |
| Loch Lomond & The Trossachs National Park in december | very bad weather |
| Glasgow in december | very bad weather |
| Newton Mearns in december | very bad weather |
| Ardrossan in december | very bad weather |
| Irvine in december | very bad weather |
Click over cities on the map for information about the weather in december.
Helensburgh
perfect weather
good
tolerable
bad
very bad
Weather data for Helensburgh in december:
Weather data for Helensburgh for december are derived from an average of the weather forecast since 2009 in Helensburgh. There is a margin of error and these forecasts are to be considered as general information only. The weather in Helensburgh can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Helensburgh.