Tonight: Becoming mainly clear with patchy frost developing late. Lows ranging from the upper 30s inland to the lower 40s along the lake Ontario shore. Northwest winds 10 to 15 mph, becoming northeast 5 to 10 mph.

Day: Sunny. Highs in the mid 50s. Northeast winds 5 to 10 mph, becoming light.

Night: Mainly clear with widespread frost developing. Lows ranging from the lower 30s inland to the upper 30s along the lake Ontario shore. Light winds.

Day: Sunny, warmer with highs in the mid 60s. Light winds.

Night: Partly cloudy. Lows in the lower 40s. Light winds.

Day: Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.

Day: Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.

Day: Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.

Night: Mostly cloudy. Lows in the upper 40s.

Day: Partly cloudy. Highs in the mid 60s. Lows in the upper 40s.

Day: Partly cloudy. Highs in the mid 60s. Lows in the upper 40s.