It's been unseasonably warm for most of the fall season across Sarnia-Lambton.
In fact, a few temperature records are at risk of being broken this week.
Environment Canada Warning Preparedness Meteorologist Geoff Coulson said they're keeping a close eye on the forecast.
"There's been a real big warm up again for the last few days of the month, not just for Sarnia but right across southwestern Ontario," said Coulson. "On Tuesday in Sarnia, we're forecasting a high of 24 C, and the current record for October 29 is 22.5 C set in 1999. So, that record could be at risk. Another very warm day is expected on October 30 with a forecast high of 23 C. The current record for that date is 22.8 C set back in 1950. On Halloween, we're forecasting a high of 23 C and the current record of 24.4 C, also set back in 1950. That record might be harder to break."
Coulson explained why autumn has been nice and warm so far.
"There's yet another big area of high pressure building to the south of the lower Great Lakes, acting like a big heat pump and causing winds to come in from the southwest," he said. "The warm wind direction brings up the air mass from the American deep south and southwest. We're expected to return to more seasonal conditions (of 10 C) to finish off the work week on Friday."
Coulson had a message for trick or treaters who plan to be out for Halloween on Thursday night.
"Late Thursday afternoon and into the evening it's still going to be very mild with temperatures in the high teens across the Lambton County area," said Coulson. "We could see some showers in the forecast as well. It will be warm, but could be on the wet side."
Coulson said temperatures could still warm back up next week.
"Not necessarily into the 20s, but we could see temperatures climbing back into the mid to high teens. Still warm for this time of year."