Helensburgh weather
The Helensburgh weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Helensburgh, Argyll and Bute, Scotland in 2026/2027.
Helensburgh weather averages
Check the Helensburgh weather averages for each month of the year including maximum daytime and minimum night-time temperatures, monthly rainfall, number of days with rain and average daily hours of sunshine for Helensburgh, Argyll and Bute, Scotland.
Helensburgh weather by month
Check the weather for Helensburgh, Argyll and Bute, Scotland for a particular month by selecting from the list below. This gives the best indication of what to expect from the weather months in advance.
Helensburgh weather in January
The average maximum daytime temperature in Helensburgh in January is a cold 4°C (39°F), while the average minimum night-time temperature is a very cold -1°C (30°F). You can expect on average 1 hours of sunshine a day in Helensburgh during January.
- 4°C max day temperature
4 - 1 hour of sunshine per day
1 - 25 days with some rainfall
25 - -1°C min night temperature
-1 - 436 mm of monthly rainfall
436
On average 436 mm (17.2 inches) of rain normally falls in Helensburgh during January with rain falling on 25 days of the month.
Helensburgh weather in February
The average maximum daytime temperature in Helensburgh in February is a cold 4°C (39°F), while the average minimum night-time temperature is a very cold -1°C (30°F). You can expect on average 2 hours of sunshine a day in Helensburgh during February.
- 4°C max day temperature4
- 2 hours of sunshine per day
2 - 21 days with some rainfall
21 - -1°C min night temperature-1
- 296 mm of monthly rainfall296
On average 296 mm (11.7 inches) of rain normally falls in Helensburgh during February with rain falling on 21 days of the month.
Helensburgh weather in March
The average maximum daytime temperature in Helensburgh in March is a cold 6°C (43°F), while the average minimum night-time temperature is a cold -0°C (32°F). You can expect on average 3 hours of sunshine a day in Helensburgh during March.
- 6°C max day temperature6
- 3 hours of sunshine per day
3 - 23 days with some rainfall
23 - -0°C min night temperature
-0 - 323 mm of monthly rainfall323
On average 323 mm (12.7 inches) of rain normally falls in Helensburgh during March with rain falling on 23 days of the month.
Helensburgh weather in April
The average maximum daytime temperature in Helensburgh in April is a cool 9°C (48°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 5 hours of sunshine a day in Helensburgh during April.
- 9°C max day temperature
9 - 5 hours of sunshine per day
5 - 18 days with some rainfall
18 - 1°C min night temperature1
- 179 mm of monthly rainfall
179
On average 179 mm (7 inches) of rain normally falls in Helensburgh during April with rain falling on 18 days of the month.
Helensburgh weather in May
The average maximum daytime temperature in Helensburgh in May is a cool 12°C (54°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 5 hours of sunshine a day in Helensburgh during May.
- 12°C max day temperature
12 - 5 hours of sunshine per day5
- 18 days with some rainfall18
- 4°C min night temperature4
- 162 mm of monthly rainfall162
On average 162 mm (6.4 inches) of rain normally falls in Helensburgh during May with rain falling on 18 days of the month.
Helensburgh weather in June
The average maximum daytime temperature in Helensburgh in June is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 5 hours of sunshine a day in Helensburgh during June.
- 15°C max day temperature
15 - 5 hours of sunshine per day5
- 18 days with some rainfall18
- 6°C min night temperature6
- 161 mm of monthly rainfall161
On average 161 mm (6.3 inches) of rain normally falls in Helensburgh during June with rain falling on 18 days of the month.
Helensburgh weather in July
The average maximum daytime temperature in Helensburgh in July is a comfortable 17°C (63°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 5 hours of sunshine a day in Helensburgh during July.
- 17°C max day temperature17
- 5 hours of sunshine per day5
- 20 days with some rainfall20
- 9°C min night temperature9
- 189 mm of monthly rainfall
189
On average 189 mm (7.4 inches) of rain normally falls in Helensburgh during July with rain falling on 20 days of the month.
Helensburgh weather in August
The average maximum daytime temperature in Helensburgh in August is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 4 hours of sunshine a day in Helensburgh during August.
- 16°C max day temperature16
- 4 hours of sunshine per day
4 - 19 days with some rainfall19
- 9°C min night temperature9
- 230 mm of monthly rainfall
230
On average 230 mm (9.1 inches) of rain normally falls in Helensburgh during August with rain falling on 19 days of the month.
Helensburgh weather in September
The average maximum daytime temperature in Helensburgh in September is a cool 13°C (55°F), while the average minimum night-time temperature is a cold 6°C (43°F). You can expect on average 3 hours of sunshine a day in Helensburgh during September.
- 13°C max day temperature13
- 3 hours of sunshine per day3
- 22 days with some rainfall22
- 6°C min night temperature6
- 314 mm of monthly rainfall314
On average 314 mm (12.4 inches) of rain normally falls in Helensburgh during September with rain falling on 22 days of the month.
Helensburgh weather in October
The average maximum daytime temperature in Helensburgh in October is a cool 10°C (50°F), while the average minimum night-time temperature is a cold 4°C (39°F). You can expect on average 2 hours of sunshine a day in Helensburgh during October.
- 10°C max day temperature10
- 2 hours of sunshine per day2
- 24 days with some rainfall24
- 4°C min night temperature4
- 354 mm of monthly rainfall354
On average 354 mm (13.9 inches) of rain normally falls in Helensburgh during October with rain falling on 24 days of the month.
Helensburgh weather in November
The average maximum daytime temperature in Helensburgh in November is a cold 6°C (43°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 2 hours of sunshine a day in Helensburgh during November.
- 6°C max day temperature6
- 2 hours of sunshine per day2
- 23 days with some rainfall23
- 1°C min night temperature1
- 361 mm of monthly rainfall361
On average 361 mm (14.2 inches) of rain normally falls in Helensburgh during November with rain falling on 23 days of the month.
Helensburgh weather in December
The average maximum daytime temperature in Helensburgh in December is a cold 4°C (39°F), while the average minimum night-time temperature is a cold -0°C (32°F). You can expect on average 1 hours of sunshine a day in Helensburgh during December.
- 4°C max day temperature4
- 1 hour of sunshine per day1
- 25 days with some rainfall25
- -0°C min night temperature-0
- 409 mm of monthly rainfall409
On average 409 mm (16.1 inches) of rain normally falls in Helensburgh during December with rain falling on 25 days of the month.