Olds residents should cover their plants tonight as Environment Canada forecasts a risk of frost, with temperatures expected to dip to plus 2C after a mild Monday afternoon. The overnight low comes just over a week past the average last spring frost date for the area, putting gardens and early crops at risk.
Monday reached a comfortable 18.4C at 3:00 p.m. MDT, but the sharp drop tonight is a reminder that frost can strike well into June in central Alberta. The average last frost for Olds is May 30, with a growing season of only about 101 days. Late frosts are not unheard of in the province; similar cold snaps have been recorded roughly once a decade, including in Edmonton in 2011 and 2024.
The rest of the week will bring a mix of conditions. Tuesday’s high is forecast at 23C before a risk of thunderstorms moves in during the evening. Environment Canada’s seven-day forecast shows highs bouncing between 13C and 23C through Sunday, with sun and clouds trading off. Residents with outdoor plans should keep an eye on the sky mid-week, especially since Olds sits within Alberta’s Hail Alley—a zone stretching from south of Calgary to north of Red Deer where severe thunderstorms and hail are common.
Gardens are the main concern tonight. Tender plants like tomatoes, peppers, and corn can be damaged or killed by frost, while hardier vegetables such as kale, cabbage, and root crops usually survive a light chill. But frost risk varies widely across small distances. One yard might stay above freezing while a neighbour’s garden gets hit, depending on slopes, tree cover, and other microclimates. Covering plants with sheets or moving pots indoors can make the difference.
After tonight’s cold snap, the forecast points to a gradual warm-up, with Sunday’s high predicted to be a more seasonable 23C. Still, the unsettled pattern means residents should stay tuned to updates from Environment Canada throughout the week.
