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.

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For a detailed overview over the year and the best time to visit the United Kingdom, check out our St Martin Guernsey's climate page.

St Martin Guernsey Temperature in September

Min Temperature 16°C (61°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 43%  

Precipitation 67 mm (2.6 in)  

Rainy days 13 days  

Sunshine 182 hours *  

Percentage Sunshine 47% *  

* Data from: Guernsey, the United Kingdom (3 KM, 2 Miles).

What to Wear in St Martin Guernsey in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in St Martin Guernsey in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

10/10

Walking

10/10

Barbeque

7/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our St Martin Guernsey's climate page.

More climate data for St Martin Guernsey

Temperature Rainfall Sunshine

See the full St Martin Guernsey climate overview or explore weather in the United Kingdom.