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Weather in St Austell for September 2026

Your guide to St Austell weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in St Austell has been nearly identical to the historical average, with a temperature of 17.2 °C (showing only a slight deviation of 0.3 °C).

  • The forecast for the next days in St Austell predicts temperatures to be around 17 °C, close to the historical average.

  • In general, the average temperature in St Austell at the beginning of September is 17.7 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 16.7 °C by the end of September.

    • Rain 🌧️

  • St Austell in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 98.5 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
15°/9°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
84 %
Avg humidity

St Austell Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain shower
17°
2
Light rain shower
18°
3
Light rain shower
18°
4
Light rain shower
17°
5
Patchy rain possible
17°
6
Cloudy
20°
7
Light rain shower
17°
8
Patchy rain possible
16°
9
Light rain shower
15°
10
Light drizzle
16°
11
Light rain shower
16°
12
Light rain shower
17°
13
Light rain shower
16°
14
Light rain shower
18°
15
Light rain shower
16°
16
Light rain shower
15°
17
Patchy rain possible
16°
18
Patchy rain possible
18°
19
Mist
18°
20
Overcast
18°
21
Sunny
17°
22
Sunny
18°
23
Overcast
19°
24
Cloudy
17°
25
Sunny
16°
26
Overcast
17°
27
Overcast
17°
28
Patchy rain possible
17°
29
Patchy rain possible
16°
30
Sunny
17°

Temperatures trend during September in St Austell

See the weather trend as well as the moving average line

September weather in St Austell day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 17° /12° 4.5 mm 3
2 Sept. Light rain shower
Light rain shower
 18° /12° 3.6 mm 3
3 Sept. Light rain shower
Light rain shower
 18° /14° 8.6 mm 3
4 Sept. Light rain shower
Light rain shower
 17° /12° 3.5 mm 3
5 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0.3 mm 3
6 Sept. Cloudy
Cloudy
 20° /13° 0.1 mm 3
7 Sept. Light rain shower
Light rain shower
 17° /12° 4 mm 3
8 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 11.3 mm 3
9 Sept. Light rain shower
Light rain shower
 15° /11° 4.1 mm 3
10 Sept. Light drizzle
Light drizzle
 16° /11° 2.1 mm 3
11 Sept. Light rain shower
Light rain shower
 16° /12° 3.8 mm 3
12 Sept. Light rain shower
Light rain shower
 17° /12° 4.2 mm 2
13 Sept. Light rain shower
Light rain shower
 16° /13° 4 mm 2
14 Sept. Light rain shower
Light rain shower
 18° /12° 3.2 mm 3
15 Sept. Light rain shower
Light rain shower
 16° /13° 3.4 mm 2
16 Sept. Light rain shower
Light rain shower
 15° /12° 2.2 mm 2
17 Sept. Patchy rain possible
Patchy rain possible
 16° /13° 2.4 mm 3
18 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 0.6 mm 3
19 Sept. Mist
Mist
 18° /13° 0 mm 4
20 Sept. Overcast
Overcast
 18° /14° 0.4 mm 4.1
21 Sept. Sunny
Sunny
 17° /14° 0 mm 4.3
22 Sept. Sunny
Sunny
 18° /15° 0 mm 4.1
23 Sept. Overcast
Overcast
 19° /14° 0 mm 3.6
24 Sept. Cloudy
Cloudy
 17° /14° 0 mm 5
25 Sept. Sunny
Sunny
 16° /15° 0 mm 5
26 Sept. Overcast
Overcast
 17° /14° 0 mm 4
27 Sept. Overcast
Overcast
 17° /15° 0 mm 5
28 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0.4 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 16° /12° 3.2 mm 5
30 Sept. Sunny
Sunny
 17° /15° 0 mm 5
Next
Important Notice
Our weather forecast for St Austell 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 Austell forecast closer to your planned date for the most up-to-date weather information.
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St Austell in September - FAQ

What are the expected maximum and minimum temperatures in St Austell during September?
During September, expect a variety of temperatures with highs around 15° and lows near 9°, suitable for diverse activities and preferences.

How much rainfall should be expected in St Austell during September?
Moderate rainfall is anticipated in St Austell during September, with a total of 98.5 mm spread over approximately 17 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in St Austell during September?
The average wind speed in St Austell during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in St Austell

Explore the daily rainfall trends and prepare for St Austells September weather 💧
Typically, St Austell has 17 rainy days in September with a total of 98.5 mm of rainfall.

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Location coordinates Where is St Austell?

Get accurate weather forecasts for St Austell, located at latitude 50.343 and longitude -4.774. Stay updated with localized weather information tailored for St Austell.

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