Grilly Weather in September

September in Grilly averages 20°C (68°F) during the day and 10°C (50°F) at night. Quite a bit of rainfall is typical this month, with around 129 mm (5.1 in) on average. An umbrella is a good idea.

Rainfall in Grilly in September

Typically, you can expect about 12 days of rain this month, with 129 mm (5.1 in) on average. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Grilly in September

Expect highs of 20°C (68°F) in Grilly in September, with nights dropping to around 10°C (50°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Grilly in September

You can expect a moderate amount of sunlight, with approximately 183 hours. This means a pleasant mix of sun and overcast.

Average water temperature in September

The water sits at 20°C (68°F), which is a nice temperature for swimming. Not too cold, not too warm, most visitors are happy to spend time in the water.

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