Despite a very warm start to September, the average temperature has started to cool off. The average temperature is now at 17.7 degrees Celsius two and half weeks into the month, down from 18.1 C a week ago. The normal for the month is 16.2 C and we should easily reach the lower figure in short order with cooler temperatures forecast for the rest of the month.
The ground temperature thermometer has already registered readings close to zero, but no sign of frost yet. While a lot of leaves are beginning to turn yellow as they dry out, especially on the corn and soybeans, few trees have yet to turn from green to the golden colours of fall.
Heat units have continued to march on with 343 CHU so far in September. Prorated at 316 CHU compared to the monthly normal of 559 CHU, this is well ahead of the normal pace. Since May 12 when the CHU count started, the area has already received 3000 CHU which means that 2022 will almost certainly be an above–average year.
The area missed the huge deluge of rain that soaked downtown Montreal (about 80 millimetresin two hours) last week and only received a downpour ranging from 20-40 mm of rain,depending on the location. The Ormstown area received 41 mm last week (the monthly total is now 44 mm) while the Environment Canada weather station at Saint-Anicet reported 30 mm,with only 18 mm in Ste-Anne-de-Bellevue. The forecast for the coming week is shower activity throughout, with the possibility of another 40 mm of precipitation.