St Martin Guernsey Weather in September

September in St Martin Guernsey averages 19°C (66°F) during the day and 16°C (61°F) at night. Quite a bit of rainfall is typical this month, with around 67 mm (2.6 in) on average. An umbrella is a good idea.

Rainfall in St Martin Guernsey in September

Expect around 13 days of rain based on historical data, with 67 mm (2.6 in) average. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in St Martin Guernsey in September

September in St Martin Guernsey brings pleasant temperatures, with highs of 19°C (66°F) and nights around 16°C (61°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights cool down to 16°C (61°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in St Martin Guernsey in September

The area experiences a moderate amount of sunshine, with approximately 182 hours of sunlight expected. This means a decent mix of sun and overcast.

If your ideal day consists of dry skies and pleasant temperatures, July, August and September typically offer the best circumstances for St Martin Guernsey.