The Gleaner
Weather Report

Châteauguay Valley Weather May 2024

May 2024 ended up being the fourth warmest since weather records started to be kept on the farm in Ormstown in 1966. The average temperature for the month settled at 16.3°C while the normal for the month is 14.3°C. The warmer than usual weather came from an unforecast mini-heat wave during the third week of May, and warmer than average nights throughout the month.

The warmest month of May was in 1998 at 16.8°C, and the coldest in 1967 at 9.2°C. The weather service in Burlington, VT, which has records dating back to 1895, recorded the second warmest May in the mountain state.

It may have been warm but it was also relatively dry. There was only 9 mm of rain in the last week of the month, bringing the total to 57 mm, which is only 55% of normal. The dry weather enabled a lot of planting to take place in the last two weeks of the month, and farmers are also well into completing their first cut of hay.

With corn planting now largely complete, the annual heat unit count (CHU) now stands at 289 CHU as of May 19th. For those who got corn in the ground during the week before, the count could run as high as 419 CHU given the very rapid germination of the corn seeds once in the ground. Despite the dry weather, there is still good moisture in the soil and the lack of snow in the late winter enabled the soil to warm up and stay warm much earlier than normal.

June is forecast to quite hot for the first few days, and then average after that for the remainder of the month. True to tradition, Desjardins Expo Ormstown will have to live with showers throughout the duration of the fair but the latter half of the month is looking good with lots of sunshine and temperatures in the mid- to high 20’s.

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