easeweather.com
Châteauguay
AbbotsfordAjaxAuroraBanffBarrieBoisbriandBouchervilleBramptonBrandonBrantfordBrossardBurlingtonBurnabyCalgaryCambridgeCharlottetownChathamChilliwack
Châteauguay
CoquitlamCornwallDartmouthDeltaDorvalEdmontonFort McMurrayFrederictonGatineauGranbyGrande PrairieGreater SudburyGuelphHalifaxHamiltonKamloopsKanataKelownaKingstonKitchenerLangleyLavalLethbridgeLindsayLondonMarkhamMiltonMissionMississaugaMonctonMont-RoyalMontréalMoose JawNanaimoNepeanNew GlasgowNewmarketNiagara FallsNorfolk CountyNorth BattlefordNorth BayOakvilleOkanaganOrilliaOshawaOttawaPentictonPeterboroughPickeringPointe-ClairePrince AlbertPrince EdwardPrince GeorgeQuébecRed DeerReginaRichmond HillSaguenaySaint JohnSarniaSaskatoonSault Ste. MarieSherbrookeSt. CatharinesSt. John'sSurreySydneyThunder BayTimminsTorontoVancouverVaughanVictoriaWasaga BeachWaterlooWellandWest VancouverWhistlerWindsorWinnipegWoodstockYellowknife More Locations
Canada weather

Weather in Châteauguay for September 2026

Your guide to Châteauguay weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Châteauguay is slightly cooler than the historical average by 0.7 °C.

  • Expect cooler weather in the next days in Châteauguay with the forecast suggesting a temperature of 19.6 °C, lower than the historical average.

  • In general, the average temperature in Châteauguay at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °C by the end of September.

    • Rain 🌧️

  • The climate of Châteauguay in September is notably wet, with an average of 15 rainy days, and a total of 173.8 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/12°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Châteauguay Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
25°
2
Mist
24°
3
Sunny
25°
4
Mist
26°
5
Mist
25°
6
Cloudy
24°
7
Patchy light rain with thunder
23°
8
Light rain shower
21°
9
Overcast
21°
10
Light rain shower
22°
11
Sunny
21°
12
Overcast
24°
13
Overcast
25°
14
Sunny
19°
15
Overcast
18°
16
Fog
21°
17
Overcast
18°
18
Patchy rain possible
17°
19
Sunny
18°
20
Sunny
18°
21
Sunny
21°
22
Overcast
21°
23
Patchy rain possible
14°
24
Sunny
20°
25
Sunny
18°
26
Partly cloudy
20°
27
Mist
21°
28
Mist
22°
29
Mist
23°
30
Mist
21°

Temperatures trend during September in Châteauguay

See the weather trend as well as the moving average line

September weather in Châteauguay day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Mist
Mist
 25° /12° 2.1 mm 5
2 Sept. Mist
Mist
 24° /13° 17.7 mm 5
3 Sept. Sunny
Sunny
 25° /14° 22.8 mm 6
4 Sept. Mist
Mist
 26° /15° 7.4 mm 7
5 Sept. Mist
Mist
 25° /15° 8.4 mm 5
6 Sept. Cloudy
Cloudy
 24° /15° 7.2 mm 6
7 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 23° /13° 6.8 mm 5
8 Sept. Light rain shower
Light rain shower
 21° /11° 19.4 mm 4
9 Sept. Overcast
Overcast
 21° /10° 4.5 mm 4
10 Sept. Light rain shower
Light rain shower
 22° /11° 6.9 mm 6
11 Sept. Sunny
Sunny
 21° /12° 0 mm 5.2
12 Sept. Overcast
Overcast
 24° /12° 0 mm 5.4
13 Sept. Overcast
Overcast
 25° /17° 6.1 mm 3.8
14 Sept. Sunny
Sunny
 19° /12° 0 mm 4.9
15 Sept. Overcast
Overcast
 18° /10° 0.1 mm 4
16 Sept. Fog
Fog
 21° /17° 11.7 mm 5
17 Sept. Overcast
Overcast
 18° /14° 1.6 mm 5
18 Sept. Patchy rain possible
Patchy rain possible
 17° /12° 0 mm 5
19 Sept. Sunny
Sunny
 18° /10° 0 mm 5
20 Sept. Sunny
Sunny
 18° /10° 0 mm 5
21 Sept. Sunny
Sunny
 21° /13° 0 mm 6
22 Sept. Overcast
Overcast
 21° /12° 0 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 14° /10° 1.4 mm 3
24 Sept. Sunny
Sunny
 20° /10° 0 mm 5
25 Sept. Sunny
Sunny
 18° /12° 42.2 mm 4
26 Sept. Partly cloudy
Partly cloudy
 20° /11° 52.9 mm 5
27 Sept. Mist
Mist
 21° /8° 0 mm 5
28 Sept. Mist
Mist
 22° /11° 0 mm 5
29 Sept. Mist
Mist
 23° /9° 0 mm 6
30 Sept. Mist
Mist
 21° /10° 0 mm 5
Next
Important Notice
Our weather forecast for Châteauguay in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Châteauguay forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Châteauguay in September - FAQ

What are the expected maximum and minimum temperatures in Châteauguay during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Châteauguay during September?
Significant rainfall exceeding 173.8 mm is expected in Châteauguay during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Châteauguay during September?
The average wind speed in Châteauguay during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Châteauguay

Explore the daily rainfall trends and prepare for Châteauguays September weather 💧
Typically, Châteauguay has 15 rainy days in September with a total of 173.8 mm of rainfall.

UV exposure in Châteauguay during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

More Châteauguay weather pages
You are here
Location coordinates Where is Châteauguay?

Get accurate weather forecasts for Châteauguay, located at latitude 45.383 and longitude -73.749. Stay updated with localized weather information tailored for Châteauguay.

Found a mistake?
We appreciate your attention to details. Tell us here.