Weather in Weymouth for September 2025
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Until now, September 2025 in Weymouth is slightly cooler than the historical average by -1.2 °C.
Expect cooler weather in the next days in Weymouth with the forecast suggesting a temperature of 16.7 °C, lower than the historical average.
In general, the average temperature in Weymouth at the beginning of September is 19.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.1 °C by the end of September.
Weymouth in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 90.8 mm.
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Weymouth Weather September
Temperatures trend during September in Weymouth
September weather in Weymouth day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain shower | 19° /15° | 4.5 mm | 5 | |
| 2 Sept. | Light rain shower | 19° /14° | 3.1 mm | 4 | |
| 3 Sept. | Light rain shower | 19° /15° | 3.3 mm | 4 | |
| 4 Sept. |  Sunny | 19° /14° | 5.3 mm | 5 | |
| 5 Sept. | Sunny | 19° /14° | 3.7 mm | 5 | |
| 6 Sept. |  Overcast | 20° /15° | 6.9 mm | 5 | |
| 7 Sept. | Sunny | 20° /16° | 1.1 mm | 5 | |
| 8 Sept. |  Partly cloudy | 18° /15° | 5.9 mm | 5 | |
| 9 Sept. | Partly cloudy | 19° /15° | 1.8 mm | 5 | |
| 10 Sept. | Light rain shower | 18° /14° | 2.2 mm | 4 | |
| 11 Sept. | Partly cloudy | 17° /13° | 1.3 mm | 4 | |
| 12 Sept. | Overcast | 16° /12° | 2.1 mm | 4 | |
| 13 Sept. | Overcast | 15° /11° | 2.4 mm | 4 | |
| 14 Sept. | Sunny | 17° /13° | 1.2 mm | 4 | |
| 15 Sept. | Patchy rain possible | 16° /15° | 1.4 mm | 1 | |
| 16 Sept. | Patchy rain possible | 17° /14° | 0.5 mm | 0.9 | |
| 17 Sept. | Patchy rain possible | 17° /15° | 4.7 mm | 0.5 | |
| 18 Sept. | Patchy rain possible | 18° /17° | 0.3 mm | 0.9 | |
| 19 Sept. | Partly cloudy | 18° /17° | 0 mm | 1 | |
| 20 Sept. | Patchy rain possible | 18° /16° | 0.4 mm | 4 | |
| 21 Sept. | Patchy rain possible | 17° /15° | 1.6 mm | 4 | |
| 22 Sept. | Patchy rain possible | 17° /15° | 0.4 mm | 4 | |
| 23 Sept. | Patchy rain possible | 16° /15° | 1.1 mm | 4 | |
| 24 Sept. | Patchy rain possible | 16° /15° | 2.9 mm | 4 | |
| 25 Sept. | Patchy rain possible | 16° /15° | 2.5 mm | 4 | |
| 26 Sept. | Sunny | 16° /13° | 0 mm | 4 | |
| 27 Sept. | Patchy rain possible | 17° /16° | 1.4 mm | 4 | |
| 28 Sept. | Patchy rain possible | 15° /14° | 0.5 mm | 3 | |
| 29 Sept. | Overcast | 17° /13° | 5.9 mm | 4 | |
| 30 Sept. |  Cloudy | 16° /13° | 4.8 mm | 4 | |
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Weymouth in September - FAQ
Weymouth water temperatures in September
The average water temperature of the Atlantic Ocean near Weymouth in September is 17.4 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Weymouth in September?
- The average water temperature in Weymouth in September is 17.4 °C.
- Can you swim in Weymouth in September?
- Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.
September rainfall patterns in Weymouth
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