September · United Kingdom
Best time to visit St Ives in September Weather, crowds & prices
Weather in St Ives in September
Average temperature 16°C, 112 mm of rain, about 23 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
5.1/10
Ranked #6 of 12 months
- Avg temp
- 16°C
- Rainfall
- 112 mm
- Humidity
- 83%
- Days with 6h+ sun
- 23
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in St Ives scores 5.1/10 for beach and coastal travel - an above-average month (#6 of 12). Expect around 16°C, 112 mm of rain, and roughly 23 days with 6+ hours of sunshine this month.
St Ives stacks white cottages, fishing boats and Tate galleries around a Cornish harbour.
September in St Ives — workable with trade-offs
Temperatures hover around 16°C (61°F) — the kind of month where neither heat nor cold forces the schedule.
112 mm of rain makes this a wet month here, though with about 23 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 5.1/10 on the same scale — 6th of 12 months, versus 6/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in St Ives in September?
- In September, St Ives averages 16°C, 112 mm of rain, and about 23 days with 6+ hours of sunshine. Its climate-comfort score is 5.1/10.
- Is September a good time to visit St Ives?
- September earns a 5.1/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in St Ives in September?
- Expect about 112 mm of rain in September. Average humidity is 83% and there are about 23 days with 6+ hours of sunshine.
Curated in St Ives
Tickets & experiences
Things to do in St Ives
St Ives, United Kingdom. Live activities and tours from GetYourGuide, matched to this destination.