St Austell Weather in September
September in St Austell brings pleasant temperatures around 19°C (66°F) during the day, dropping to 12°C (54°F) at night, with the driest conditions of the year.
Rainfall in St Austell in September
The risk of rain is at its lowest this month, making it a reliable choice for outdoor plans. Based on our climate data of the past 30 years, about 15 days of rain are anticipated, with 69 mm (2.7 in) on average. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in St Austell in September
In September, St Austell sees pleasant temperatures, with highs of 19°C (66°F). Nights drop to around 12°C (54°F). The summer season takes place during September. Conditions are often most pleasant around the middle of the day. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in St Austell in September
The month brings about 165 hours of sunlight, offering a comfortable mix of sun and overcast.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for St Austell.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United Kingdom, check out our St Austell's climate page.
St Austell Temperature in September
Min Temperature
12°C (54°F)
Max Temperature
19°C (66°F)
Chance of Rain
50%
Precipitation
69 mm (2.7 in)
Rainy days
15 days
Sunshine
165 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in St Austell typically stay consistent throughout September, with daily highs averaging around 19°C (66°F). Nights are cool, with lows around 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for St Austell in September
Browse day-by-day weather records for St Austell spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
St Austell historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in St Austell.
- On September 7, 2021, temperatures climbed to 27°C (81°F), marking the warmest September day on record.
- St Austell experienced its chilliest September day on September 15, 1986, reaching only 11°C (52°F).
- St Austell registered its coldest September night on September 27, 2007, with temperatures dropping to 5°C (41°F).
- The wettest September day on record brought 39 mm (1.5 in) of precipitation to St Austell (September 3, 2017).
Best Places in the United Kingdom in September
Find out more about the weather in the United Kingdom and which places have the best travel conditions in this month. See all of the United Kingdom in September →
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What to Wear in St Austell in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in St Austell in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United Kingdom, check out our St Austell's climate page.
See the full St Austell climate overview or explore weather in the United Kingdom.
