Weather in Nepean in September
In an average September, Nepean sees a daily high around 21°C and a low around 11°C, based on 1980–2026 of local climate records.
| Average high | 21°C |
|---|---|
| Typical high range | 16°C to 27°C |
| Average low | 11°C |
| Typical low range | 5°C to 17°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
35°C
2002-09-09
Lowest
7°C
1992-09-30
Low
Highest
23°C
1983-09-06
Lowest
-2°C
1980-09-29
Feels-like
Highest
51°C
2023-09-05
Lowest
-7°C
1980-09-29
Humidity
Highest
20.6 g/m³
2018-09-03
Lowest
3.8 g/m³
2000-09-28
Wind
Highest
39 km/h
2006-09-24
Lowest
4 km/h
2016-09-04
Gust
Highest
92 km/h
2018-09-21
Lowest
12 km/h
2004-09-30
Precip
Wettest
171 mm
1986
Driest
14 mm
2023
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