Daytime highs, nighttime lows and the warmest cities in Guernsey, the United Kingdom this September.
Guernsey, the United Kingdom, a region in the United Kingdom, typically experiences pleasant weather in September, with maximum daytime temperatures around 19°C (66°F) and nighttime temperatures around 16°C (61°F) in St Peter Port.
Explore the map below to discover average September temperatures at the top destinations in Guernsey. For a deeper dive, simply click on any destination dot.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Guernsey.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Daytime temperatures in St Peter Port typically peak at 19°C (66°F) in September, putting it in the pleasant range.
After dark, St Peter Port cools to about 16°C (61°F) on an average September night.
St Peter Port enjoys a balanced 182 hours of sunlight. This makes it neither too overcast nor too sunny.
We have much more information about the climate in Guernsey.
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