Weather in Regional Municipality of Niagara for September 2025
Until now, September 2025 in Regional Municipality of Niagara is slightly cooler than the historical average by -1.9 °C.
The forecast for the upcoming days in Regional Municipality of Niagara predicts a temperature of 26.4 °C, which is slightly above the historical average.
In general, the average temperature in Regional Municipality of Niagara at the beginning of September is 25.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.7 °C by the end of September.
Regional Municipality of Niagara experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 77.7 mm.
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Regional Municipality of Niagara Weather September
Temperatures trend during September in Regional Municipality of Niagara
September weather in Regional Municipality of Niagara day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 25° /10° | 0.2 mm | 6 | |
| 2 Sept. |  Mist | 23° /9° | 0 mm | 5 | |
| 3 Sept. |  Overcast | 28° /11° | 0 mm | 7 | |
| 4 Sept. |  Partly cloudy | 27° /13° | 9 mm | 7 | |
| 5 Sept. | Mist | 28° /13° | 0 mm | 7 | |
| 6 Sept. |  Thundery outbreaks possible | 26° /14° | 4 mm | 6 | |
| 7 Sept. |  Light rain shower | 20° /11° | 2.2 mm | 5 | |
| 8 Sept. | Fog | 21° /9° | 0 mm | 5 | |
| 9 Sept. | Overcast | 24° /9° | 0 mm | 5 | |
| 10 Sept. | Overcast | 24° /11° | 0 mm | 5 | |
| 11 Sept. | Patchy rain possible | 26° /13° | 0.1 mm | 6 | |
| 12 Sept. |  Moderate or heavy rain shower | 26° /12° | 3.9 mm | 6 | |
| 13 Sept. | Overcast | 25° /12° | 0 mm | 6 | |
| 14 Sept. | Mist | 25° /10° | 0 mm | 6 | |
| 15 Sept. | Overcast | 25° /11° | 0 mm | 6 | |
| 16 Sept. | Sunny | 28° /9° | 0 mm | 1.4 | |
| 17 Sept. | Sunny | 29° /10° | 0 mm | 1.4 | |
| 18 Sept. | Mist | 30° /9° | 0 mm | 1.3 | |
| 19 Sept. | Partly cloudy | 23° /11° | 0 mm | 1.4 | |
| 20 Sept. | Sunny | 22° /9° | 0 mm | 1.3 | |
| 21 Sept. | Patchy rain possible | 30° /13° | 0.9 mm | 0 | |
| 22 Sept. | Patchy rain possible | 28° /17° | 0.9 mm | 5 | |
| 23 Sept. | Sunny | 28° /17° | 0.1 mm | 6 | |
| 24 Sept. | Patchy rain possible | 26° /12° | 0.2 mm | 4 | |
| 25 Sept. | Sunny | 25° /10° | 0 mm | 5 | |
| 26 Sept. | Sunny | 27° /13° | 0 mm | 5 | |
| 27 Sept. | Sunny | 25° /14° | 0 mm | 5 | |
| 28 Sept. | Partly cloudy | 25° /14° | 0.1 mm | 5 | |
| 29 Sept. | Mist | 23° /14° | 0 mm | 4 | |
| 30 Sept. | Mist | 22° /14° | 0 mm | 5 | |
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Regional Municipality of Niagara in September - FAQ
September rainfall patterns in Regional Municipality of Niagara
UV exposure in Regional Municipality of Niagara during September
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