Guernsey in september: average Weather, Temperature and Climate
Weather in Guernsey in september 2025
The weather in Guernesey in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
63°F
Partly Cloudy
32% of time
28%
20%
14%
Weather at 12pm
63°F
Partly Cloudy
34% of time
33%
16%
13%
Weather at 6pm
63°F
Clear/Sunny
45% of time
26%
14%
13%
Weather at 3am
63°F
33%
28%
20%
16%
Evolution of daily average temperature and precipitation in Guernsey in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Guernsey in september.
The climate of Guernsey in september is good
the weather in Guernesey in september is relatively dry (with 3.1in of rainfall over 5 days). It should be noted an improvement from the previous month since in august it receives an average of 3.6in of rainfall over 6 days.
The climate is rather cool here the month of september, but it is liveable by dressing warm. The thermometer averaged maximum of 65°F. In the morning the temperature drops to 61°F. Thus, the mean temperature average on this month of september in Guernesey is 63°F. Note that seasonal normals are in contrast with those observed in Guernesey in the month of september with a maximum record of 72°F in 2011 and a minimum record of 49°F in 2020. You can hope to have about 12 days with temperatures over 65°F, or 40% of the month.
On average, in Guernesey, the days of september last 12:36. The sun rises at 05:47 and sunset is at 18:23.
With a good climate, this month is recommended to go in Guernesey.
Seasonal average climate and temperature of Guernsey in september
Check below seasonal norms These datas are generated from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 63°F | ||||
| Highest temperature | 65°F | ||||
| Lowest temperature | 61°F | ||||
| Highest record temperature | 72°F (2011) | ||||
| Lowest record temperature | 49°F (2020) | ||||
| Number of days at +65°F | 12 day(s) (40%) | ||||
| Sea temperature | |||||
| Average sea temperature | 64°F | ||||
| Lowest sea temperature | 62°F | ||||
| Highest sea temperature | 66°F | ||||
| Wind | |||||
| Wind speed | 29km/h | ||||
| Wind temperature | 61°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.1in | ||||
| Number of days with rainfall | 5 day(s) (16%) | ||||
| Record daily rainfall | 2.2in (2012) | ||||
| Other climate data | |||||
| Humidity | 83% | ||||
| Visibility | 9.58km | ||||
| Cloud cover | 39% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:47 | ||||
| Time of sunset | 18:23 | ||||
| Length of day | 12:36 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Guernsey in september 2024:
65°F to 67°F
63°F to 67°F
63°F to 65°F
61°F to 63°F
59°F to 65°F
61°F to 65°F
63°F to 65°F
61°F to 63°F
61°F to 63°F
61°F to 63°F
58°F to 61°F
58°F to 59°F
58°F to 59°F
56°F to 59°F
58°F to 63°F
61°F to 65°F
61°F to 65°F
65°F to 67°F
65°F to 67°F
63°F to 67°F
61°F to 63°F
61°F to 63°F
59°F to 61°F
61°F to 63°F
59°F to 63°F
61°F to 63°F
56°F to 59°F
56°F to 58°F
56°F to 61°F
59°F to 63°F
Map: other cities in England in september
Cities near Guernsey:
| Jersey in september | good weather |
| Salcombe in september | good weather |
| Isle of Portland in september | good weather |
| Weymouth in september | good weather |
| Paignton in september | good weather |
| Torquay in september | good weather |
| Dorset in september | good weather |
| Exmouth in september | good weather |
| Bournemouth in september | good weather |
| Plymouth in september | good weather |
| Exeter in september | good weather |
| Isle of Wight in september | good weather |
Click over cities on the map for information about the weather in september.
Guernsey
perfect weather
good
tolerable
bad
very bad
Weather data for Guernsey in september:
Weather data for Guernsey for september are derived from an average of the weather forecast since 2009 in Guernsey. There is a margin of error and these forecasts are to be considered as general information only. The weather in Guernsey can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Guernsey.