Environment Canada is forecasting a stretch of unseasonably warm weather for Chestermere this week, with daytime highs reaching up to 29°C on Monday and staying well above seasonal norms through Wednesday.
The normal high for late September in the area is about 17°C, making this week’s temperatures around 8 to 12 degrees warmer than usual. According to Environment Canada, the forecast calls for a high of 29°C on Monday, 28°C on Tuesday, and 25°C on Wednesday, under sunny to mainly sunny skies. No weather alerts are in effect for Chestermere or Rocky View County.
The extended warm spell is being driven by a very strong El Niño event, which has set up a stable ridge pattern over western Canada. This has delayed the usual autumn cool-down and brought consistently warm temperatures to the Calgary region, including Chestermere.
Residents can expect ideal conditions for outdoor activities through the first half of the week. However, the heat will feel more like summer than fall, and The Weather Network’s fall forecast for Alberta suggests the warmer and drier pattern may continue, with winter weather unlikely to arrive early.
A change begins on Thursday, when a mix of sun and cloud brings a high of 21°C, with a 30% chance of showers Thursday night. Friday will see similar conditions but a cooler high of around 16°C. Chestermere Lake remains at summer operating levels, though the Western Irrigation District is scheduled to begin its seasonal drawdown in mid-October.
