Helensburgh Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Helensburgh.
Climate overview of Helensburgh
Helensburgh, Strathclyde, United Kingdom, sees big temperature differences between seasons, with July peaking at 19°C (66°F) and January dropping to 8°C (46°F).
The city receives considerable rain/snowfall, with around 1780 mm (70 in) annually. January is the wettest month. It has pleasant summers and cold winters. May is the sunniest month, averaging 6.3 hours of sunshine per day.
Helensburgh Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Helensburgh - and find the best time to visit.
Monthly Temperature in Helensburgh
Visitors to Helensburgh can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 8°C (46°F) in the coolest month, January.
Nights vary from 11°C (52°F) in July to around 2°C (36°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Helensburgh
Helensburgh is known for its substantial rain/snowfall, with annual precipitation reaching 1780 mm (70 in). Precipitation levels in Helensburgh remain relatively steady throughout the year. January has the most rain, with 184 mm (7.2 in) over 23 days. In the driest month April, this drops slightly to 113 mm (4.4 in), making the city's climate fairly predictable. For more details, please visit our Helensburgh Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Helensburgh
For those who appreciate different seasons, Helensburgh serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.3 hours of sunshine daily, and embrace the darker days in January, offering only 1.2 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Helensburgh by Month
The relative humidity is high throughout the year in Helensburgh.
The city experiences its highest humidity in January, reaching 87%. In May, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Helensburgh
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and August
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Helensburgh
What is the best time to visit Helensburgh?
July and August typically offer the most optimal weather in Helensburgh. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions. Helensburgh has pleasant summers and cold winters.
What temperatures can I expect in Helensburgh?
Daytime highs range from 8°C (46°F) in January to 19°C (66°F) in July. Nighttime lows range from 2°C (36°F) to 11°C (52°F). Temperatures vary considerably through the year.
How much rain does Helensburgh get?
Annual rainfall is around 1780 mm (70 in). January is the wettest month with 184 mm (7.2 in), while April is the driest with 113 mm (4.4 in).
How sunny is Helensburgh?
Helensburgh receives around 1,290 hours of sunshine per year. May is the sunniest month with 188 hours, while January is the cloudiest with just 37 hours.
Helensburgh 3-Day Forecast
Helensburgh on the map
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