Climate guideThirty-year normals for Dorval
Dorval climate by month
Hot-summer humid continental · DfaBest May–Jun · Sep
Annual mean8°day and night
Seasonal swing30°warmest vs coolest
Precipitation1,039 mm144 wet days a year
45.45° N, 73.75° WElevation 27 mUTC−4 · Eastern Daylight Time
When to goDorval · weather score
Best timeMay–Jun · Sep
October: high / low14° / 5°
iSummary
What the weather is like
Dorval has a hot-summer humid continental climate (Köppen Dfa): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 27° and nights 17°. 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 1,039 mm of precipitation falls in an average year. August is the wettest month (98 mm, 15 wet days) and September the driest (91 mm, 8 wet days). Cloud cover ranges from 32% in July to 50% in November.
Compared with Ottawa, the capital, Dorval is 0.3° 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
- August
- Driest month
- September
- Clearest skies
- July · 32% cloud
- Longest day
- 15 h 39 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° | 7° | 0° |
| Average low | -13° | -12° | -6° | 1° | 9° | 14° | 17° | 16° | 12° | 5° | -1° | -8° |
| Precipitation | 74 mm | 64 mm | 65 mm | 85 mm | 88 mm | 99 mm | 96 mm | 98 mm | 91 mm | 96 mm | 96 mm | 87 mm |
| Wet days (≥1 mm) | 12 | 10.2 | 11.7 | 12 | 10.3 | 13.7 | 14 | 15.3 | 8.2 | 10.8 | 12 | 14 |
| Cloud cover | 48% | 45% | 45% | 44% | 41% | 37% | 32% | 32% | 37% | 42% | 50% | 50% |
| Daylight | 9h 06 | 10h 24 | 11h 52 | 13h 31 | 14h 53 | 15h 39 | 15h 20 | 14h 08 | 12h 34 | 11h 00 | 9h 32 | 8h 44 |
| Month score | 22 | 28 | 24 | 33 | 71 | 65 | 57 | 62 | 78 | 48 | 21 | 17 |
ivMonth by month
Dorval in every month
January22
-4° / -13°
74 mm · 12 wet days
February28
-2° / -12°
64 mm · 10.2 wet days
March24
3° / -6°
65 mm · 11.7 wet days
April33
12° / 1°
85 mm · 12 wet days
May71
20° / 9°
88 mm · 10.3 wet days
June65
25° / 14°
99 mm · 13.7 wet days
July57
27° / 17°
96 mm · 14 wet days
August62
26° / 16°
98 mm · 15.3 wet days
September78
22° / 12°
91 mm · 8.2 wet days
October48
14° / 5°
96 mm · 10.8 wet days
November21
7° / -1°
96 mm · 12 wet days
December17
0° / -8°
87 mm · 14 wet days