Complete 2015 Long-Range Weather Forecast for the Southern Ontario Region, November 2014 to October 2015 includes week-by-week details.
Free 2-Month Weather Forecast
AUGUST 2015: temperature 20.5°C (1°C above avg.); precipitation 85mm (20mm above avg. east, 20mm below west); Aug 1-9: Sunny, then t-storms, hot; Aug 10-20: Showers, cool; Aug 21-26: Sunny, cool; Aug 27-31: T-storms, warm.
SEPTEMBER 2015: temperature 15°C (0.5°C above avg.); precipitation 70mm (20mm below avg.); Sep 1-6: T-storms, then sunny, cool; Sep 7-13: Scattered showers, cool; Sep 14-25: T-storms, then sunny, cool; Sep 26-30: Showers, warm.
Annual Weather Summary: November 2014 to October 2015
Winter temperatures and precipitation will be below normal, with the coldest periods in mid-December, early and mid-January, and early to mid-February. Snowfall will be below normal in Southwest Ontario and above normal elsewhere, with the snowiest periods in December and mid- to late March.
April and May temperatures will be near normal, with precipitation below normal east, above west.
Summer will be warmer than normal, with the hottest temperatures in mid- to late July and early August. Rainfall will be above normal in the east and below in the west.
September and October will be warmer than normal, with precipitation below normal in the east and above in the west.