easeweather.com
Oshawa
AbbotsfordAjaxAuroraBanffBarrieBoisbriandBouchervilleBramptonBrandonBrantfordBrossardBurlingtonBurnabyCalgaryCambridgeCharlottetownChathamChilliwackCoquitlamCornwallDartmouthDeltaDorvalEdmontonFort McMurrayFrederictonGatineauGranbyGrande PrairieGreater SudburyGuelphHalifaxHamiltonKamloopsKanataKelownaKingstonKitchenerLangleyLavalLethbridgeLindsayLondonMarkhamMiltonMissionMississaugaMonctonMont-RoyalMontréalMoose JawNanaimoNepeanNew GlasgowNewmarketNiagara FallsNorfolk CountyNorth BattlefordNorth BayOakvilleOkanaganOrillia
Oshawa
OttawaPentictonPeterboroughPickeringPointe-ClairePrince AlbertPrince EdwardPrince GeorgeQuébecRed DeerReginaRichmond HillSaguenaySaint JohnSarniaSaskatoonSault Ste. MarieSherbrookeSt. CatharinesSt. John'sSurreySydneyThunder BayTimminsTorontoVancouverVaughanVictoriaWasaga BeachWaterlooWellandWest VancouverWhistlerWhitehorseWindsorWinnipegWoodstockYellowknife More Locations
Canada weather

Weather in Oshawa for September 2026

Your guide to Oshawa weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Oshawa has been nearly identical to the historical average, with a temperature of 22.9 °C (showing only a slight deviation of 0 °C).

  • Expect cooler weather in the next days in Oshawa with the forecast suggesting a temperature of 20.9 °C, lower than the historical average.

  • In general, the average temperature in Oshawa at the beginning of September is 23.4 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21.3 °C by the end of September.

    • Rain 🌧️

  • Oshawa experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 81.3 mm.

    • More

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

Average dry days
21
Dry days
Average rainy days
9
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/13°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Oshawa Weather September

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

Temperatures trend during September in Oshawa

See the weather trend as well as the moving average line

September weather in Oshawa day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 23° /14° 0.4 mm 5
2 Sept. Mist
Mist
 23° /15° 105.7 mm 4
3 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 25° /15° 0 mm 6
4 Sept. Sunny
Sunny
 25° /16° 9.5 mm 6
5 Sept. Sunny
Sunny
 25° /15° 0.3 mm 7
6 Sept. Overcast
Overcast
 23° /15° 0.7 mm 6
7 Sept. Light rain shower
Light rain shower
 20° /12° 4 mm 5
8 Sept. Overcast
Overcast
 21° /11° 0 mm 5
9 Sept. Overcast
Overcast
 21° /14° 4.5 mm 4
10 Sept. Overcast
Overcast
 22° /12° 0.1 mm 6
11 Sept. Sunny
Sunny
 22° /11° 0 mm 6
12 Sept. Overcast
Overcast
 23° /13° 0 mm 6
13 Sept. Fog
Fog
 25° /15° 0.5 mm 5.6
14 Sept. Sunny
Sunny
 20° /9° 0 mm 5.4
15 Sept. Light rain shower
Light rain shower
 24° /13° 13.3 mm 5
16 Sept. Light rain shower
Light rain shower
 22° /16° 6.8 mm 6
17 Sept. Overcast
Overcast
 16° /14° 0.1 mm 4
18 Sept. Sunny
Sunny
 18° /10° 0 mm 5
19 Sept. Sunny
Sunny
 20° /10° 0 mm 5
20 Sept. Sunny
Sunny
 21° /12° 0 mm 6
21 Sept. Sunny
Sunny
 21° /14° 0 mm 6
22 Sept. Overcast
Overcast
 19° /13° 0 mm 5
23 Sept. Overcast
Overcast
 19° /12° 0 mm 5
24 Sept. Sunny
Sunny
 23° /14° 0 mm 6
25 Sept. Overcast
Overcast
 24° /14° 18.1 mm 5
26 Sept. Partly cloudy
Partly cloudy
 22° /14° 0 mm 6
27 Sept. Overcast
Overcast
 18° /11° 0 mm 4
28 Sept. Overcast
Overcast
 21° /13° 0.1 mm 4
29 Sept. Fog
Fog
 20° /13° 0 mm 4
30 Sept. Overcast
Overcast
 21° /13° 0 mm 5
Next
Important Notice
Our weather forecast for Oshawa 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 Oshawa forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Oshawa in September - FAQ

What are the expected maximum and minimum temperatures in Oshawa during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Oshawa during September?
Moderate rainfall is anticipated in Oshawa during September, with a total of 81.3 mm spread over approximately 9 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Oshawa during September?
The average wind speed in Oshawa during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Oshawa

Explore the daily rainfall trends and prepare for Oshawas September weather 💧
Typically, Oshawa has 9 rainy days in September with a total of 81.3 mm of rainfall.

UV exposure in Oshawa during September

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

Quick links

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

Get accurate weather forecasts for Oshawa, located at latitude 43.9 and longitude -78.85. Stay updated with localized weather information tailored for Oshawa.

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