Tonight: Partly cloudy early, then becoming mostly cloudy. Lows in the lower 40s. Light winds, becoming north 5 to 10 mph.

Day: Becoming mostly sunny. Highs ranging from the upper 40s on the tug hill to the mid 50s across the lower elevations. North winds 5 to 10 mph.

Night: Mainly clear with widespread frost developing. Lows ranging from the lower 30s across the tug hill to the upper 30s along the lake Ontario shore. North winds 5 to 10 mph, becoming light.

Day: Sunny. Highs ranging from the lower 50s inland to the mid 50s along the lake Ontario shore. North winds 5 to 10 mph.

Night: Mainly clear. Widespread frost. Patchy fog overnight. Lows ranging from around 30 across the tug hill to the mid 30s along the lake Ontario shore. Light winds.

Day: Mostly sunny. Patchy fog. Highs in the mid 50s.

Night: Mostly cloudy with a 50 percent chance of showers. Lows in the lower 40s. Highs in the mid 60s.

Day: Mostly cloudy with a 50 percent chance of showers. Lows in the lower 40s. Highs in the mid 60s.

Night: Mostly cloudy with a 50 percent chance of showers. Lows in the lower 50s.

Day: Showers likely. Highs in the upper 60s. Chance of rain 70 percent.

Night: Showers. Lows in the mid 40s. Highs in the upper 50s. Chance of rain 80 percent.

Day: Showers. Lows in the mid 40s. Highs in the upper 50s. Chance of rain 80 percent.

Night: Showers likely. Lows in the mid 40s. Chance of rain 60 percent.

Day: Partly sunny with a 40 percent chance of showers. Highs in the upper 50s.