The Frontier Gazette & Almanack
“Fair Warning for Every Town Under the Sky” · Est. 1881
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L'Assomption Weather in September

L'Assomption in September

The short of it: L'Assomption in September averages a high of 22 °C (71 °F) and a low of 10 °C (51 °F), with 79 mm (3.1 in) of rain and about 12 h 28 min of daylight. Rated 3 of 5 for a visit; the best months are June and September. Source: TerraClimate climate normals, 1991–2020.

Average high 22° · low 10° · rain 79 mm · daylight 12 h 28 min

✦✦✦ Fair for a visit · best months: June & September

September in L'Assomption brings afternoons near 22° and nights around 10°, with about 79 mm of rain over the month. The year turns hard here: highs drop 4° from August to about 22°, with nights near 10°. Wet spells are common — about 79 mm, the 9th wettest month.

The sun is up for about 12 h 28 min in mid-September, 99 minutes less than a month before.

For the traveller: pack light clothes and a jacket for the evening, and an oilskin besides. The Almanac rates September 3 of 5 for a visit; the finest months here are June and September.

Against its neighbours, L'Assomption runs cooler than most and drier than most in September. Repentigny, 9 km to the S, sees much the same highs.

September in L'Assomption, by the numbers

Warmth rank
4th warmest of 12
Rain rank
9th wettest of 12
Versus August
4° colder, 20 mm less rain
Versus October
8° warmer
Day–night spread
11°
Snow season
Nov–Apr
Daylight, mid-month
12 h 28 min
Average wind
10 km/h

Neighbouring Towns

September averages · distance by the crow’s flight
TownDistanceHighLowRain
RepentignyQuebec9 km S22°11°79 mm
MascoucheQuebec16 km WSW22°11°88 mm
JolietteQuebec21 km N21°10°86 mm
TerrebonneQuebec22 km SW22°11°86 mm
Rivière-des-Prairies–Pointe-aux-TremblesQuebec24 km SSW22°11°86 mm
BouchervilleQuebec26 km S22°11°84 mm
Sainte-JulieQuebec28 km SSE21°10°82 mm
Saint-LéonardQuebec29 km SSW22°11°88 mm

The Almanac · L'Assomption Month by Month

Climate normals 1991–2020 · pick a month
PrecipitationAverage highAverage low
Fair
The Almanac Speaks
September
✦✦✦✦✦

The year turns hard here: highs drop 4° from August to about 22°, with nights near 10°. Wet spells are common — about 79 mm, the 9th wettest month.

Climate of L'Assomption by month
MonthHighLowRainWindDaylightVisit
January-6°-16°70 mm14 km/h9 h 2 min✦
February-4°-15°57 mm14 km/h10 h 18 min✦
March1°-9°60 mm13 km/h11 h 46 min✦
April10°0°83 mm14 km/h13 h 28 min✦
May18°7°85 mm13 km/h14 h 55 min✦✦✦
June24°12°100 mm11 km/h15 h 42 min✦✦✦
July26°15°87 mm10 km/h15 h 23 min✦✦✦
August26°15°99 mm10 km/h14 h 7 min✦✦✦
September22°10°79 mm10 km/h12 h 28 min✦✦✦
October13°4°108 mm12 km/h10 h 50 min✦✦
November6°-1°87 mm13 km/h9 h 23 min✦
December-1°-9°84 mm14 km/h8 h 41 min✦

Questions Readers Ask about L'Assomption in September

Answered from the wire & the Almanac

What is the weather like in L'Assomption in September?

Days average 22 °C (71 °F) and nights 10 °C (51 °F), with about 79 mm (3.1 in) of rain over the month. The year turns hard here: highs drop 4° from August to about 22°, with nights near 10°. Wet spells are common — about 79 mm, the 9th wettest month.

Is September a good time to visit L'Assomption?

The Almanac gives September 3 of 5 (fair). The best months are June and September.

How long are the days in L'Assomption in September?

In mid-September the sun is up for about 12 h 28 min. The days are shortening — from 8 h 41 min in December to 15 h 42 min in June.

Does it snow in L'Assomption in September?

Hardly — September nights average 10 °C (51 °F), above freezing.

What should I pack for L'Assomption in September?

Light clothes and a jacket for the evening, plus a good raincoat — it is a wet month.

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The Editor’s Remark

“Weather is the only news that never grows stale. Each morning the sky writes its own front page, and we at Wanted Weather are but its telegraph operators.”— J. Whitmore, Editor
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