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Guernsey weather in September 2023
- 1818°C max day temperature
- 1313 days with some rainfall
- 1313°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 6363 mm of monthly rainfall
- 44 (Moderate) UV index
- 1717°C sea temperature
Recommended for Guernsey
The September weather guide for Guernsey, represented by St Peter Port, (St Peter Port) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Metric (°C / mm) | Imperial (°F / inches)
How hot is it in Guernsey in September?
Daytime temperatures usually reach 18°C in St Peter Port, Guernsey in September, falling to 13°C at night.
How sunny is it in Guernsey in September?
There are normally 6 hours of bright sunshine each day in St Peter Port, Guernsey in September - that's 45% of daylight hours.
How warm is the sea around Guernsey in September?
The average sea temperature around St Peter Port, Guernsey in September is 17°C.
Does it rain in Guernsey in September?
There are usually 13 days with some rain in St Peter Port, Guernsey in September and the average monthly rainfall is 63mm.
Guernsey September sunrise & sunset times
Browse the sunrise and sunset times for Guernsey in September 2023. Select a month to view Guernsey sunrise and sunset times for the next 12 months. The Guernsey sunrise and sunset times shown below are for St Peter Port.
|Date||Sunrise times||Sunset times|
|Friday, 1st September 2023||06:25||19:54|
|Friday, 15th September 2023||06:46||19:24|
|Saturday, 30th September 2023||07:08||18:52|
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