Dorset (Weymouth)
September
Weather in Dorset for September 2026
Your guide to Dorset weather in September - trends and predictions
In general, the average temperature in Dorset 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.
Dorset in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 90.8 mm.
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Temperatures
Rain 🌧️
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11
Dry days
19
Rainy days
0
Snow days
17°/14°
Temperatures
29 km/h
Avg max wind
79 %
Avg humidity
Dorset Weather September
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Temperatures trend during September in Dorset
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September weather in Dorset day by day
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| 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. | Sunny | 17° /14° | 0.5 mm | 5 | |
| 16 Sept. | Patchy rain possible | 18° /14° | 0.4 mm | 4 | |
| 17 Sept. | Light rain shower | 18° /13° | 3.2 mm | 4 | |
| 18 Sept. | Light rain shower | 19° /14° | 1.5 mm | 5 | |
| 19 Sept. | Light rain shower | 19° /14° | 1 mm | 5 | |
| 20 Sept. | Light rain shower | 18° /13° | 3.9 mm | 4 | |
| 21 Sept. | Light rain shower | 15° /12° | 8.1 mm | 4 | |
| 22 Sept. | Light rain shower | 16° /11° | 2.1 mm | 4 | |
| 23 Sept. | Patchy rain possible | 16° /11° | 0.2 mm | 4 | |
| 24 Sept. | Overcast | 17° /12° | 0.8 mm | 4 | |
| 25 Sept. | Overcast | 16° /12° | 2 mm | 4 | |
| 26 Sept. | Patchy rain possible | 16° /12° | 8.6 mm | 4 | |
| 27 Sept. |  Patchy light drizzle | 16° /12° | 3.2 mm | 4 | |
| 28 Sept. | Patchy rain possible | 16° /12° | 0.5 mm | 4 | |
| 29 Sept. | Overcast | 16° /12° | 3.9 mm | 4 | |
| 30 Sept. |  Cloudy | 16° /12° | 3.2 mm | 4 | |
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Important Notice
Our weather forecast for Dorset 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 Dorset forecast closer to your planned date for the most up-to-date weather information.
Change Month
Dorset in September - FAQ
What are the expected maximum and minimum temperatures in Dorset during September?
Enjoy moderate daytime temperatures of up to 17° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Dorset during September?
Moderate rainfall is anticipated in Dorset during September, with a total of 90.8 mm spread over approximately 19 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Dorset during September?
The average wind speed in Dorset during September is 29 km/h, suggesting breezy to windy conditions, depending on your activities.
Dorset water temperatures in September
The average water temperature of the Atlantic Ocean near Dorset in September is 17 °C. At the beginning of September temperatures are around 17.4 °C; by the end of the month they get a bit cooler and reach 16.6 °C.
- What is the water temperature in Dorset in September?
- The average water temperature in Dorset in September is 17 °C.
- Can you swim in Dorset 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 Dorset
Explore the daily rainfall trends and prepare for Dorsets September weather 💧
Typically, Dorset has 19 rainy days in September with a total of 90.8 mm of rainfall.
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