Plymouth
September
Weather in Plymouth for September 2025
Your guide to Plymouth weather in September - trends and predictions
In general, the average temperature in Plymouth at the beginning of September is 19.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.4 °C by the end of September.
Expect significant rainfall in Plymouth during September, with an average of 20 rainy days.
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10
Dry days
20
Rainy days
0
Snow days
18°/14°
Temperatures
26 km/h
Avg max wind
82 %
Avg humidity
Plymouth in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2  18° | 3  19° | 4 19° | 5 19° | 6 19° | 7  21° |
| 8 19° | 9 20° | 10 18° | 11 17° | 12  16° | 13 15° | 14 16° |
| 15 18° | 16 19° | 17 17° | 18 19° | 19 19° | 20 18° | 21 16° |
| 22 15° | 23 16° | 24 17° | 25 16° | 26 15° | 27 15° | 28 14° |
| 29 15° | 30 16° |
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Temperatures trend during September in Plymouth
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. | Partly cloudy | 19° /13° | 0.6 mm | 5 | |
| 2 Sept. | Patchy rain possible | 18° /12° | 1 mm | 4 | |
| 3 Sept. | Sunny | 19° /13° | 0.1 mm | 5 | |
| 4 Sept. | Sunny | 19° /14° | 0.2 mm | 5 | |
| 5 Sept. | Sunny | 19° /13° | 7.6 mm | 5 | |
| 6 Sept. | Patchy rain possible | 19° /15° | 14.2 mm | 5 | |
| 7 Sept. | Moderate or heavy rain shower | 21° /15° | 11 mm | 5 | |
| 8 Sept. | Patchy rain possible | 19° /16° | 23 mm | 5 | |
| 9 Sept. | Partly cloudy | 20° /15° | 0.1 mm | 5 | |
| 10 Sept. | Light rain shower | 18° /13° | 3.6 mm | 5 | |
| 11 Sept. | Patchy rain possible | 17° /12° | 0.7 mm | 4 | |
| 12 Sept. | Overcast | 16° /10° | 0.4 mm | 4 | |
| 13 Sept. | Overcast | 15° /9° | 0 mm | 4 | |
| 14 Sept. | Partly cloudy | 16° /11° | 0 mm | 5 | |
| 15 Sept. | Overcast | 18° /12° | 0 mm | 5 | |
| 16 Sept. | Patchy rain possible | 19° /14° | 0.6 mm | 5 | |
| 17 Sept. | Light rain shower | 17° /13° | 4.1 mm | 5 | |
| 18 Sept. | Light rain shower | 19° /12° | 1.2 mm | 5 | |
| 19 Sept. | Light rain shower | 19° /14° | 1.7 mm | 5 | |
| 20 Sept. | Light rain shower | 18° /13° | 7.5 mm | 4 | |
| 21 Sept. | Light rain shower | 16° /12° | 7.9 mm | 4 | |
| 22 Sept. | Light rain shower | 15° /12° | 3.7 mm | 4 | |
| 23 Sept. | Patchy rain possible | 16° /11° | 3.4 mm | 4 | |
| 24 Sept. | Patchy rain possible | 17° /13° | 1.8 mm | 4 | |
| 25 Sept. | Patchy rain possible | 16° /13° | 3.7 mm | 4 | |
| 26 Sept. | Light rain shower | 15° /12° | 5 mm | 4 | |
| 27 Sept. | Light rain shower | 15° /11° | 3.1 mm | 4 | |
| 28 Sept. | Light rain shower | 14° /10° | 1.4 mm | 4 | |
| 29 Sept. | Patchy rain possible | 15° /11° | 12.1 mm | 4 | |
| 30 Sept. | Overcast | 16° /11° | 1.1 mm | 4 | |
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Important Notice
Our weather forecast for Plymouth 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 Plymouth forecast closer to your planned date for the most up-to-date weather information.
Plymouth in September - FAQ
What are the expected maximum and minimum temperatures in Plymouth during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Plymouth during September?
Moderate rainfall is anticipated in Plymouth during September, with a total of 75.1 mm spread over approximately 20 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Plymouth during September?
The average wind speed in Plymouth during September is 26 km/h, suggesting breezy to windy conditions, depending on your activities.
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