Today will see a warm high of 25 °C in Sault Ste. Marie, with humidity pushing the perceived temperature to about 30 on the humidex. Skies will trend from sunshine toward more cloud through the morning while winds from the southwest at about 20 km/h ease later in the evening. Expect a comfortable overnight low near 15 °C.
Short-term outlook
After Thursday’s cloudier finish, a sunnier day is expected on Friday, when the mercury climbs slightly to 27 °C and the humidex again reaches roughly 30. The UV index will be elevated, peaking around 8 (very high), so sun protection is advisable for extended outdoor activity.
Weekend and next week
The pattern shifts into more unsettled conditions through the weekend. Saturday is forecast to be cooler, around 25 °C, with a 60 per cent probability of showers. Overnight Saturday into Sunday and into next week will bring periodic cloud and scattered rain chances, with daytime highs generally in the low to mid-20s and overnight lows dipping into the low to mid-teens.
| Day | High | Forecast | Chance of showers |
|---|---|---|---|
| Today (Thursday) | 25 °C | Becoming cloudier; humidex ~30 | — |
| Friday | 27 °C | Sunny; UV index ~8 | — |
| Saturday | 25 °C | Cloudy | 60% |
| Sunday | 24 °C | Mix of sun and cloud | 30% |
What to watch for
- Humidex values near 30 on Thursday and Friday — expect it to feel noticeably warmer than the thermometer indicates.
- Elevated UV on Friday (index about 8) — sunscreen and shade recommended for prolonged outdoor exposure.
- Increasing rain potential Saturday into next week, with the highest shower probability on Saturday.
Even as temperatures remain generally pleasant through the coming days, the combination of humidity and stronger sun on Friday adds heat stress potential for vulnerable people and outdoor workers. The community should be ready for a wetter spell beginning Saturday, which could briefly alter plans that depend on dry weather.
