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Weather in Ajax for September 2026

Your guide to Ajax weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Ajax has been nearly identical to the historical average, with a temperature of 23.6 °C (showing only a slight deviation of 0.4 °C).

  • Expect cooler weather in the next days in Ajax with the forecast suggesting a temperature of 20.1 °C, lower than the historical average.

  • In general, the average temperature in Ajax at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21.1 °C by the end of September.

    • Rain 🌧️

  • Ajax experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 71.8 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°/14°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
74 %
Avg humidity

Ajax Weather September

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

Temperatures trend during September in Ajax

See the weather trend as well as the moving average line

September weather in Ajax day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 24° /15° 0.3 mm 5
2 Sept. Mist
Mist
 23° /15° 88.9 mm 5
3 Sept. Partly cloudy
Partly cloudy
 26° /15° 0 mm 6
4 Sept. Sunny
Sunny
 25° /16° 6.7 mm 6
5 Sept. Sunny
Sunny
 25° /15° 0 mm 7
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
 23° /15° 1.1 mm 5
7 Sept. Light rain shower
Light rain shower
 20° /13° 4.7 mm 4
8 Sept. Overcast
Overcast
 21° /11° 0 mm 4
9 Sept. Overcast
Overcast
 21° /13° 3.3 mm 4
10 Sept. Overcast
Overcast
 22° /13° 0.1 mm 5
11 Sept. Sunny
Sunny
 23° /11° 0 mm 6
12 Sept. Overcast
Overcast
 21° /18° 0 mm 6
13 Sept. Sunny
Sunny
 25° /18° 0.9 mm 5.6
14 Sept. Sunny
Sunny
 18° /13° 0 mm 5.5
15 Sept. Overcast
Overcast
 20° /16° 1.4 mm 5
16 Sept. Overcast
Overcast
 22° /18° 4.9 mm 6
17 Sept. Overcast
Overcast
 18° /16° 0.1 mm 4
18 Sept. Sunny
Sunny
 18° /13° 0 mm 5
19 Sept. Sunny
Sunny
 19° /14° 0 mm 5
20 Sept. Sunny
Sunny
 20° /15° 0 mm 5
21 Sept. Sunny
Sunny
 19° /16° 0.1 mm 5
22 Sept. Overcast
Overcast
 18° /16° 0.4 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
 18° /15° 0.7 mm 5
24 Sept. Sunny
Sunny
 23° /16° 0 mm 6
25 Sept. Overcast
Overcast
 23° /15° 15.3 mm 5
26 Sept. Partly cloudy
Partly cloudy
 22° /15° 0 mm 5
27 Sept. Overcast
Overcast
 19° /12° 0 mm 4
28 Sept. Overcast
Overcast
 20° /13° 0 mm 4
29 Sept. Mist
Mist
 20° /13° 0 mm 4
30 Sept. Overcast
Overcast
 21° /13° 0 mm 5
Next
Important Notice
Our weather forecast for Ajax 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 Ajax forecast closer to your planned date for the most up-to-date weather information.
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Ajax in September - FAQ

What are the expected maximum and minimum temperatures in Ajax during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Ajax during September?
Moderate rainfall is anticipated in Ajax during September, with a total of 71.8 mm spread over approximately 9 days. Considering plans for rainy days is advisable.

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

September rainfall patterns in Ajax

Explore the daily rainfall trends and prepare for Ajaxs September weather 💧
Typically, Ajax has 9 rainy days in September with a total of 71.8 mm of rainfall.

UV exposure in Ajax during September

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

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Location coordinates Where is Ajax?

Get accurate weather forecasts for Ajax, located at latitude 43.85 and longitude -79.033. Stay updated with localized weather information tailored for Ajax.

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