September
Weather in St Peter Port for September 2025
Your guide to St Peter Port weather in September - trends and predictions
In general, the average temperature in St Peter Port at the beginning of September is 18.9 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 17.1 °C by the end of September.
The climate of St Peter Port in September is notably wet, with an average of 15 rainy days.
Is September a good time to visit St Peter Port? check out the best time to travel to St Peter Port page.
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15
Dry days
15
Rainy days
0
Snow days
18°/16°
Temperatures
31 km/h
Avg max wind
81 %
Avg humidity
St Peter Port in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  18° | 2  19° | 3  19° | 4 19° | 5 19° | 6 19° | 7 19° |
| 8 19° | 9 19° | 10 19° | 11 17° | 12  16° | 13  16° | 14 17° |
| 15 18° | 16 18° | 17 18° | 18 18° | 19 18° | 20 18° | 21 17° |
| 22  16° | 23 17° | 24 17° | 25 17° | 26 18° | 27 17° | 28 17° |
| 29 17° | 30 17° |
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Temperatures trend during September in St Peter Port
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 18° /16° | 9.2 mm | 4 | |
| 2 Sept. | Partly cloudy | 19° /16° | 0.6 mm | 5 | |
| 3 Sept. | Sunny | 19° /16° | 0.3 mm | 5 | |
| 4 Sept. | Sunny | 19° /16° | 0.4 mm | 5 | |
| 5 Sept. | Sunny | 19° /16° | 0.9 mm | 5 | |
| 6 Sept. | Patchy rain possible | 19° /17° | 0.9 mm | 5 | |
| 7 Sept. | Patchy rain possible | 19° /17° | 7.3 mm | 5 | |
| 8 Sept. | Partly cloudy | 19° /16° | 5.1 mm | 5 | |
| 9 Sept. | Patchy rain possible | 19° /16° | 0.7 mm | 5 | |
| 10 Sept. | Patchy rain possible | 19° /16° | 2.7 mm | 5 | |
| 11 Sept. | Partly cloudy | 17° /15° | 1 mm | 5 | |
| 12 Sept. | Cloudy | 16° /15° | 1.2 mm | 4 | |
| 13 Sept. | Overcast | 16° /14° | 0.1 mm | 4 | |
| 14 Sept. | Partly cloudy | 17° /14° | 0 mm | 5 | |
| 15 Sept. | Sunny | 18° /16° | 0 mm | 6 | |
| 16 Sept. | Patchy rain possible | 18° /16° | 0.8 mm | 4 | |
| 17 Sept. | Light rain shower | 18° /16° | 3.1 mm | 4 | |
| 18 Sept. | Light rain shower | 18° /16° | 0.9 mm | 4 | |
| 19 Sept. | Patchy rain possible | 18° /16° | 0.6 mm | 5 | |
| 20 Sept. | Light rain shower | 18° /16° | 15.1 mm | 4 | |
| 21 Sept. | Light rain shower | 17° /15° | 5.1 mm | 4 | |
| 22 Sept. | Patchy light drizzle | 16° /15° | 1.7 mm | 4 | |
| 23 Sept. | Patchy rain possible | 17° /14° | 5.7 mm | 4 | |
| 24 Sept. | Sunny | 17° /15° | 1.2 mm | 5 | |
| 25 Sept. | Overcast | 17° /15° | 2 mm | 4 | |
| 26 Sept. | Patchy rain possible | 18° /14° | 4.3 mm | 4 | |
| 27 Sept. | Patchy rain possible | 17° /14° | 4.2 mm | 4 | |
| 28 Sept. | Patchy rain possible | 17° /13° | 0.6 mm | 4 | |
| 29 Sept. | Cloudy | 17° /14° | 1.9 mm | 4 | |
| 30 Sept. | Partly cloudy | 17° /14° | 1.5 mm | 5 | |
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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.
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 18° and lows near 16°, 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 73.7 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 31 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to St Peter Port in September?
As you prepare for your trip to St Peter Port in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in St Peter Port, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in St Peter Port
Explore the daily rainfall trends and prepare for St Peter Ports September weather 💧
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