The climate in Helensburgh during May can be summarized as cool and wet.
May is in the spring in Helensburgh and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 5°C (41°F) is normal.
|Daytime temperature||13.1°C 55.6°F|
|Nightly temperature||4.9°C 40.8°F|
|Average temperature||9°C 48.2°F|
|Daily sunshine||5.9 hrs|
|Avg rainfall||146 mm 5.7 ins|
|Rainy days||18 days|
|Sea temperature||9.6°C 49.3°F|
|Windspeed||16.2kph 10 mph|
On average May is the 3rd driest month of the year in Helensburgh with around 146mm 5.7 inches of rain making it a wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.9 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in May 2019.
|Hottest month:||July||16.7°C 62.1°F|
|Driest month:||April||129mm 5.1ins|
|Coldest month:||February||4.5°C 40.1°F|
|Wettest month:||January||296mm 11.7ins|