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Climate Statistics · City

Normal high in September in Westmount

1991–2020 · 1 data point Updated Oct 21, 2026
Climate · Westmount

Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020

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Latest value · 1991–2020 21.1 °C
Weather through the year long-term average 1991–2020 · Riviere Des Prairies weather station, 25 km away
-5° -15°
Jan
-3° -14°
Feb
3° -7°
Mar
11° 1°
Apr
20° 8°
May
25° 14°
Jun
27° 16°
Jul
26° 15°
Aug
21° 11°
Sep
13° 4°
Oct
6° -2°
Nov
-1° -9°
Dec
67
54
58
88
85
94
99
93
91
100
77
73
High and low, °C Precipitation, mm

Source: NOAA National Centers for Environmental Information — GHCN-Daily, 1991–2020

What it means

The typical daytime high in September.

How it is calculated

Average daily maximum in September at the nearest weather station with a long record: 1991–2020, or the latest ten years.