Climate guideThirty-year normals for L'Assomption
L'Assomption climate by month
Warm-summer humid continental · DfbBest May–Jun · Sep
Annual mean7°day and night
Seasonal swing31°warmest vs coolest
Precipitation1,017 mm136 wet days a year
45.82° N, 73.43° WElevation 13 mUTC−4 · Eastern Daylight Time
When to goL'Assomption · weather score
Best timeMay–Jun · Sep
October: high / low14° / 3°
iSummary
What the weather is like
L'Assomption 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 28° and nights 15°. January is the coolest month, with highs of -4° and lows of -15°. The difference between the warmest and the coolest month is about 31°, a large swing typical of continental interiors.
About 1,017 mm of precipitation falls in an average year. August is the wettest month (97 mm, 14 wet days) and February the driest (61 mm, 9 wet days). Cloud cover ranges from 32% in July to 49% in November.
Compared with Ottawa, the capital, L'Assomption is 0.7° warmer on a July afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 28° · July
- Coldest nights
- -15° · January
- Wettest month
- August
- Driest month
- February
- Clearest skies
- July · 32% cloud
- Longest day
- 15 h 42 min
- Shortest day
- 8 h 41 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° | -3° | 3° | 13° | 21° | 25° | 28° | 26° | 22° | 14° | 6° | -1° |
| Average low | -15° | -13° | -7° | 1° | 8° | 13° | 15° | 14° | 10° | 3° | -3° | -10° |
| Precipitation | 73 mm | 61 mm | 61 mm | 81 mm | 88 mm | 99 mm | 92 mm | 97 mm | 94 mm | 93 mm | 96 mm | 82 mm |
| Wet days (≥1 mm) | 10.2 | 8.7 | 11 | 10.7 | 10.3 | 14.2 | 13.5 | 14.3 | 9.2 | 12.2 | 10 | 11.5 |
| Cloud cover | 46% | 45% | 44% | 45% | 41% | 37% | 32% | 32% | 37% | 41% | 49% | 48% |
| Daylight | 9h 04 | 10h 23 | 11h 52 | 13h 32 | 14h 56 | 15h 42 | 15h 23 | 14h 10 | 12h 34 | 10h 59 | 9h 30 | 8h 41 |
| Month score | 27 | 31 | 26 | 40 | 71 | 63 | 57 | 60 | 75 | 45 | 27 | 23 |
ivMonth by month
L'Assomption in every month
January27
-4° / -15°
73 mm · 10.2 wet days
February31
-3° / -13°
61 mm · 8.7 wet days
March26
3° / -7°
61 mm · 11 wet days
April40
13° / 1°
81 mm · 10.7 wet days
May71
21° / 8°
88 mm · 10.3 wet days
June63
25° / 13°
99 mm · 14.2 wet days
July57
28° / 15°
92 mm · 13.5 wet days
August60
26° / 14°
97 mm · 14.3 wet days
September75
22° / 10°
94 mm · 9.2 wet days
October45
14° / 3°
93 mm · 12.2 wet days
November27
6° / -3°
96 mm · 10 wet days
December23
-1° / -10°
82 mm · 11.5 wet days