Weather in St Peter Port for September 2025
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.
St Peter Port in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 79 mm.
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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St Peter Port in September average weather
| 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
September weather day by day
| 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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St Peter Port in September - FAQ
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
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Where is St Peter Port?Get accurate weather forecasts for St Peter Port, located at latitude 49.46 and longitude -2.535. Stay updated with localized weather information tailored for St Peter Port.