Weather in Markham in September
In an average September, Markham sees a daily high around 21°C and a low around 16°C, based on 1980–2026 of local climate records.
| Average high | 21°C |
|---|---|
| Typical high range | 17°C to 24°C |
| Average low | 16°C |
| Typical low range | 11°C to 20°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
29°C
1983-09-10
Lowest
10°C
1993-09-30
Low
Highest
24°C
1983-09-06
Lowest
4°C
1993-09-30
Feels-like
Highest
34°C
2018-09-05
Lowest
-1°C
1989-09-27
Humidity
Highest
20.1 g/m³
2018-09-05
Lowest
4.7 g/m³
1993-09-30
Wind
Highest
51 km/h
2003-09-19
Lowest
9 km/h
2017-09-11
Gust
Highest
88 km/h
2003-09-27
Lowest
14 km/h
2014-09-28
Precip
Wettest
201 mm
1996
Driest
18 mm
2023
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