The Gleaner
Weather Report

Châteauguay Valley Weather June 11-17, 2023

Usually, we look forward to sunshine rather than rain, but this past week was the reverse. Minimal precipitation since the middle of May was starting to make things dry and holding the crops back, but a good dose of showers and rain throughout the past week has set that straight for now.

We received 48 mm of precipitation in Ormstown in the last week, bringing the monthly total up to 63 mm, which now makes the rainfall above normal at this stage of the month. Surrounding weather stations didn’t receive quite as much rain. However, the situation is still much improved: June precipitation to date at the Environment Canada station in Saint-Anicet is 49.2 mm, with 43.8 mm in Sainte-Anne-de-Bellevue and 42.4 mm in Saint-Clotilde.

The average temperature is still on the cool side but inching up towards the monthly normal at a steady pace. The average temperature now sits at 17.3 degrees Celsius, while the previous week was 16.4 C, and the normal for the month is 18.6 C. The average is only as high as it is due to the first two days of the month when the daytime high hit 34 C and 32 C respectively, but the forecast for the coming week is for daytime highs ranging from 27-29 C, so the average will reach normal by the end of the month.

The corn heat unit (CHU) count is still behind schedule due to the cool weather. There are 339 CHU recorded so far in June, and normal would be approximately 371 CHU for this date on a prorated basis. The normal for the entire month is 655 CHU. Since the May 10th start date for the heat unit count, the total recorded is 679 CHU for the 2023 cropping season. 

Even though there were several smog warnings during the past two weeks due to the forest fires in the north, farmers have probably received an unintended benefit due to the combined smoke and rain. The precipitation will have attached to the particulate matter contained in the smoke as the rain descended, one of those particles being sulphur; having been associated in the past with acid rain, sulphur is also an essential micronutrient for farmers and gardeners, so the rain in the past week will have deposited a free top up into the soil.

Strawberries are now available in limited quantities, a bit later than usual due to the cool weather and the heavy frost in mid-May that battered many of the small fruits in southern Quebec. U-pick farms will be in operation by the Saint-Jean-Baptiste weekend.

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