Belleville weather
Best months for weather: Jun–Sep. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Belleville, Ontario, Canada.
Best Time to Visit
Peak season Jun–SepOff season Nov–Apr
Belleville weather by month
When is the best time to visit Belleville?
Based on weather alone, the best time to visit Belleville is Jun–Sep, according to NASA's 2001–2025 climate averages. Nov–Apr tends to be the least pleasant. Average highs run from -1°C (29°F) in January to 25°C (78°F) in July.
What is the rainiest month in Belleville?
October is the wettest month, with about 78 mm (3.1 in) of rain on average. March is the driest, with about 55 mm (2.2 in).
What is the hottest month in Belleville?
July is the warmest, with average highs of 25°C (78°F) and lows of 18°C (65°F). January is the coolest, with highs of -1°C (29°F) and lows of -8°C (18°F).
Does Belleville have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is October at about 78 mm (3.1 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months