Photo: Stéphane Batigne · CC BY 3.0 · Wikimedia Commons
WestmountReport this photo · linked, not stored
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Climate guideThirty-year normals for Westmount, Quebec
Westmount climate by month
Warm-summer humid continental · DfbBest May–Jun · Sep
Annual mean7°day and night
Seasonal swing30°warmest vs coolest
Precipitation1,167 mm163 wet days a year
45.48° N, 73.60° WElevation 52 mUTC−4 · Eastern Daylight Time
When to goWestmount · weather score
Best timeMay–Jun · Sep
October: high / low14° / 4°
iSummary
What the weather is like
Westmount has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 27° and nights 16°. January is the coolest month, with highs of -4° and lows of -13°. The difference between the warmest and the coolest month is about 30°, a large swing typical of continental interiors.
About 1,167 mm of precipitation falls in an average year. July is the wettest month (110 mm, 18 wet days) and February the driest (71 mm, 10 wet days). Cloud cover ranges from 32% in July to 50% in November.
Compared with Ottawa, the capital, Westmount is 0.2° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 27° · July
- Coldest nights
- -13° · January
- Wettest month
- July
- Driest month
- February
- Clearest skies
- July · 32% cloud
- Longest day
- 15 h 40 min
- Shortest day
- 8 h 44 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | -4° | -2° | 3° | 12° | 20° | 25° | 27° | 26° | 22° | 14° | 6° | -1° |
| Average low | -13° | -12° | -6° | 1° | 8° | 13° | 16° | 15° | 11° | 4° | -2° | -9° |
| Precipitation | 83 mm | 71 mm | 74 mm | 94 mm | 98 mm | 110 mm | 110 mm | 112 mm | 103 mm | 107 mm | 107 mm | 98 mm |
| Wet days (≥1 mm) | 11.5 | 10 | 12.5 | 12.3 | 11.5 | 16.8 | 18.2 | 17.8 | 12.7 | 14.2 | 12.2 | 13.7 |
| Cloud cover | 48% | 45% | 45% | 45% | 41% | 37% | 32% | 32% | 37% | 41% | 50% | 50% |
| Daylight | 9h 06 | 10h 24 | 11h 52 | 13h 31 | 14h 54 | 15h 40 | 15h 20 | 14h 08 | 12h 34 | 11h 00 | 9h 32 | 8h 44 |
| Month score | 23 | 28 | 22 | 33 | 68 | 64 | 58 | 62 | 67 | 40 | 21 | 17 |
ivMonth by month
Westmount in every month
January23
-4° / -13°
83 mm · 11.5 wet days
February28
-2° / -12°
71 mm · 10 wet days
March22
3° / -6°
74 mm · 12.5 wet days
April33
12° / 1°
94 mm · 12.3 wet days
May68
20° / 8°
98 mm · 11.5 wet days
June64
25° / 13°
110 mm · 16.8 wet days
July58
27° / 16°
110 mm · 18.2 wet days
August62
26° / 15°
112 mm · 17.8 wet days
September67
22° / 11°
103 mm · 12.7 wet days
October40
14° / 4°
107 mm · 14.2 wet days
November21
6° / -2°
107 mm · 12.2 wet days
December17
-1° / -9°
98 mm · 13.7 wet days