Weather in Markham for October 2025
Frost Warning - See hour by hour.
Until now, October 2025 in Markham is slightly cooler than the historical average by -0.6 °C.
Expect cooler weather in the next days in Markham with the forecast suggesting a temperature of 8.4 °C, lower than the historical average.
In general, the average temperature in Markham at the beginning of October is 21.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 11 °C by the end of October.
Markham experiences moderate rainfall in October, with an average of 9 rainy days and a total precipitation of 56 mm.
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Markham Weather October
Temperatures trend during October in Markham
October weather in Markham day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Oct. |  Partly cloudy | 22° /10° | 0 mm | 6 | |
| 2 Oct. |  Cloudy | 21° /11° | 4.4 mm | 5 | |
| 3 Oct. |  Mist | 25° /12° | 0 mm | 6 | |
| 4 Oct. | Mist | 23° /12° | 0 mm | 5 | |
| 5 Oct. | Mist | 22° /12° | 0.6 mm | 5 | |
| 6 Oct. |  Heavy rain | 22° /12° | 14.5 mm | 5 | |
| 7 Oct. |  Moderate or heavy rain with thunder | 15° /9° | 8 mm | 3 | |
| 8 Oct. |  Patchy rain possible | 13° /6° | 0.2 mm | 3 | |
| 9 Oct. | Patchy rain possible | 13° /4° | 0.1 mm | 3 | |
| 10 Oct. | Partly cloudy | 13° /4° | 0 mm | 4 | |
| 11 Oct. | Patchy rain possible | 16° /6° | 16.7 mm | 4 | |
| 12 Oct. |  Overcast | 16° /9° | 0 mm | 4 | |
| 13 Oct. | Overcast | 13° /6° | 0 mm | 3 | |
| 14 Oct. | Patchy rain possible | 14° /6° | 0.2 mm | 3 | |
| 15 Oct. | Overcast | 11° /4° | 0.1 mm | 3 | |
| 16 Oct. | Overcast | 14° /3° | 0.1 mm | 4 | |
| 17 Oct. | Overcast | 13° /3° | 2.2 mm | 3 | |
| 18 Oct. | Overcast | 17° /6° | 3.7 mm | 4 | |
| 19 Oct. |  Light rain | 18° /9° | 18.1 mm | 4 | |
| 20 Oct. | Light rain shower | 16° /8° | 12.8 mm | 4 | |
| 21 Oct. | Patchy rain possible | 16° /7° | 1.3 mm | 4 | |
| 22 Oct. |  Light sleet showers | 12° /7° | 5.6 mm | 3 | |
| 23 Oct. | Cloudy | 14° /5° | 1.6 mm | 3 | |
| 24 Oct. |  Thundery outbreaks possible | 12° /4° | 0.2 mm | 3 | |
| 25 Oct. | Light rain | 13° /7° | 0.9 mm | 3 | |
| 26 Oct. | Light rain | 12° /6° | 0.7 mm | 3 | |
| 27 Oct. | Patchy rain possible | 13° /6° | 0.5 mm | 4 | |
| 28 Oct. | Overcast | 12° /2° | 0.2 mm | 3 | |
| 29 Oct. |  Sunny | 13° /1° | 0 mm | 0.5 | |
| 30 Oct. |  Moderate rain | 9° /3° | 5.1 mm | 0.1 | |
| 31 Oct. | Patchy rain possible | 5° /3° | 5 mm | 0.1 | |
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Markham in October - FAQ
October rainfall patterns in Markham
UV exposure in Markham during October
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