September
Weather in St Peter Port for September 2026
Your guide to St Peter Port weather in September - trends and predictions
Until now, September 2026 in St Peter Port has been nearly identical to the historical average, with a temperature of 17.6 °C (showing only a slight deviation of 0.3 °C).
The forecast for the next days in St Peter Port predicts temperatures to be around 17 °C, close to the historical average.
In general, the average temperature in St Peter Port at the beginning of September is 18.4 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 17 °C by the end of September.
The climate of St Peter Port in September is notably wet, with an average of 15 rainy days, and a total of 78.7 mm of precipitation.
Temperatures
Rain 🌧️
15
Dry days
15
Rainy days
0
Snow days
17°/15°
Temperatures
35 km/h
Avg max wind
78 %
Avg humidity
St Peter Port Weather September
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Temperatures trend during September in St Peter Port
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September weather in St Peter Port day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 17° /16° | 5.8 mm | 3 | |
| 2 Sept. |  Partly cloudy | 18° /15° | 3 mm | 4 | |
| 3 Sept. |  Sunny | 19° /16° | 1.3 mm | 4 | |
| 4 Sept. | Patchy rain possible | 18° /16° | 1.2 mm | 4 | |
| 5 Sept. | Sunny | 18° /16° | 0.4 mm | 5 | |
| 6 Sept. | Patchy rain possible | 20° /16° | 0.4 mm | 4 | |
| 7 Sept. | Light rain shower | 19° /16° | 4.1 mm | 4 | |
| 8 Sept. | Partly cloudy | 18° /15° | 9.9 mm | 4 | |
| 9 Sept. | Patchy rain possible | 18° /15° | 1.6 mm | 4 | |
| 10 Sept. | Light rain shower | 18° /15° | 1.9 mm | 4 | |
| 11 Sept. | Partly cloudy | 17° /15° | 1.8 mm | 4 | |
| 12 Sept. |  Cloudy | 17° /15° | 2.2 mm | 4 | |
| 13 Sept. |  Overcast | 16° /15° | 1 mm | 3 | |
| 14 Sept. | Partly cloudy | 18° /15° | 0.4 mm | 5 | |
| 15 Sept. | Sunny | 18° /15° | 0.3 mm | 5 | |
| 16 Sept. | Patchy rain possible | 18° /16° | 0.7 mm | 4 | |
| 17 Sept. | Patchy rain possible | 17° /16° | 1.5 mm | 5 | |
| 18 Sept. | Patchy rain possible | 17° /16° | 0.3 mm | 4 | |
| 19 Sept. | Overcast | 17° /17° | 0.2 mm | 5 | |
| 20 Sept. | Overcast | 18° /17° | 0.2 mm | 5 | |
| 21 Sept. | Sunny | 18° /17° | 0 mm | 5 | |
| 22 Sept. | Sunny | 19° /18° | 0 mm | 5 | |
| 23 Sept. | Sunny | 19° /17° | 0 mm | 5 | |
| 24 Sept. | Overcast | 19° /18° | 0 mm | 4 | |
| 25 Sept. | Sunny | 18° /16° | 0 mm | 5 | |
| 26 Sept. | Sunny | 17° /15° | 0 mm | 5 | |
| 27 Sept. | Overcast | 16° /13° | 0 mm | 4 | |
| 28 Sept. | Overcast | 16° /15° | 0 mm | 4 | |
| 29 Sept. | Sunny | 16° /15° | 0 mm | 5 | |
| 30 Sept. | Patchy rain possible | 17° /15° | 3.3 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for St Peter Port in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St Peter Port forecast closer to your planned date for the most up-to-date weather information.
Change Month
St Peter Port in September - FAQ
What are the expected maximum and minimum temperatures in St Peter Port during September?
During September, expect a variety of temperatures with highs around 17° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in St Peter Port during September?
Moderate rainfall is anticipated in St Peter Port during September, with a total of 78.7 mm spread over approximately 15 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in St Peter Port during September?
The average wind speed in St Peter Port during September is 35 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in St Peter Port
Explore the daily rainfall trends and prepare for St Peter Ports September weather 💧
Typically, St Peter Port has 15 rainy days in September with a total of 78.7 mm of rainfall.
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