Monday starts off bright and unseasonably warm before a series of rain-bearing systems move into the region beginning Tuesday. Environment Canada is calling for mainly sunny skies throughout the day with winds gusting up to 50 km/h. Despite the brisk breeze, temperatures will climb to a high of 18 C. Clouds will begin to build in through the evening, with fog patches developing overnight. Winds will ease after sunset, becoming light as temperatures drop to a low of 8 C. Then Tuesday will see a notable shift toward unsettled weather, with the day expected to be mainly cloudy with a 40 per cent chance of rain or drizzle, particularly later in the morning. Any overnight fog patches should lift shortly after sunrise. The normal high for this time of year is 5 C and the low is around -3 C. Here’s a look at the rest of the forecast Monday: Mainly sunny. Wind southwest 30 km/h gusting to 50. High 18. Monday Night: Increasing cloudiness. Fog patches developing overnight. Wind southwest 30 km/h gusting to 50 becoming light this evening. Low 8 Tuesday: Mainly cloudy with 40 per cent chance of rain or drizzle. Risk of a thunderstorm in the afternoon. Fog patches dissipating in the morning. Wind becoming south 20 km/h late in the morning. High 16. Wednesday: Showers. High 11. Thursday: A mix of sun and cloud. High plus 2. Friday: Cloudy with 60 per cent chance of snow or rain. High plus 3.