Grimsby, Ontario, is in for a sunny start to the week before thunderstorms and strong winds move in on Tuesday. According to Environment Canada, no weather alerts are in effect, but residents should be ready for changing conditions.
Monday brings sunshine with a high of 25°C and a humidex of 28. The UV index will reach 9, which is considered very high. Anyone spending time outside should wear sunscreen, a hat, and stay hydrated, especially between 11 a.m. and 3 p.m.
Things shift overnight into Tuesday. Environment Canada calls for a 100% chance of showers with a risk of thunderstorms. Winds will be from the southwest at 20 km/h, gusting to 70 km/h before increasing to 40 km/h gusting to 60 km/h in the morning. The high will again be 25°C, but the humidex could hit 33, making it feel much stickier. Remember: when thunder roars, go indoors. Wait 30 minutes after the last clap before going back outside.
Wednesday offers a break with a mix of sun and cloud and a 30% chance of showers. The temperature will be cooler at 20°C. Thursday and Friday look pleasant with sunny skies and highs of 23°C and 25°C. The weekend shows a return to a mix of sun and cloud with highs around 26°C.
For reference, July is typically Grimsby’s warmest month, with average highs around 26°C. The town sits between Lake Ontario and Lake Erie, which helps moderate the weather. A humidex below 30 is generally comfortable, while 40 to 45 can cause great discomfort. Tuesday’s humidex of 33 will feel quite muggy but not dangerous.
Residents can stay updated with the latest forecasts and any alerts through Environment Canada’s website.
