Weather in St Helens in September
In an average September, St Helens sees a daily high around 17°C and a low around 11°C, based on 1980–2026 of local climate records.
| Average high | 17°C |
|---|---|
| Typical high range | 14°C to 20°C |
| Average low | 11°C |
| Typical low range | 8°C to 14°C |
| Average daily precipitation | 3 mm |
September records
The most extreme September on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
28°C
2021-09-08
Lowest
11°C
1998-09-12
Low
Highest
18°C
2016-09-06
Lowest
2°C
2025-09-22
Feels-like
Highest
30°C
2021-09-07
Lowest
-2°C
2025-09-22
Humidity
Highest
15.6 g/m³
2023-09-09
Lowest
5.9 g/m³
2005-09-24
Wind
Highest
50 km/h
1983-09-03
Lowest
6 km/h
2001-09-21
Gust
Highest
97 km/h
1988-09-23
Lowest
11 km/h
2002-09-20
Precip
Wettest
185 mm
1984
Driest
16 mm
1986
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