Cornwall, Ontario Weather
Cornwall, Ontario — live current conditions, hourly and 7-day forecasts, ECCC alerts, aviation weather, radar and satellite imagery, marine and fishing conditions with a solunar forecast for Cornwall in Stormont.
Marine forecast and fishing conditions near Cornwall.
Flight conditions near Cornwall. Data source: locating…
About Cornwall, Ontario
Cornwall is a city in Stormont, Ontario, Canada. It has a population of 47,845. Cornwall is located at 45.0264°N, 74.7264°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K6J.
Cornwall occupies a low-lying stretch of land along the St. Lawrence River, where the horizon feels wide and the air carries the cool, persistent dampness of the current. It lies 50.8 km east-north-east of Iroquois, ON (from Iroquois, ON: bearing 67°T), and is situated 13.2 km east of Long Sault. The terrain holds a quiet steadiness, anchored by the presence of Lairds Hill, which rises slightly above the flat expanses that define the regional topography. At dusk, the light catches the surface of the St. Lawrence River in long, bruised ribbons of violet and grey, while the Rivière Saint-Régis flows through the nearby landscape, tracing a path eight kilometers away that seems to pull the silence of the countryside toward the water. The history of Cornwall reflects a long reliance on the movement of goods and the harnessing of the river’s immense energy. Industrial life here grew from the necessity of the waterway, shifting from early milling operations to more complex manufacturing that defined the regional economy for generations. Today, the workaday pulse of Cornwall remains visible in the heavy infrastructure that lines the banks, where the legacy of power generation and logistics continues to dictate the way the morning light hits the brickwork of older warehouses. These structures stand as heavy, solid markers of a labor-focused past, grounding the modern day in the stubborn persistence of an industrial heritage. Cultural life in Cornwall finds its voice in the endurance of its people and the quiet traditions of those who have long claimed this riverfront as home. The pace of life settles into the steady, predictable motion of the river, a constant companion that influences the local temperament and the way people gather in public spaces. Among those who have emerged from this setting, the musician Ryan Gosling spent his formative years here, absorbing the particular character of a riverside upbringing before moving toward a different stage. Cornwall maintains a sense of self that does not demand attention, preferring instead to exist within the simple, honest clarity of its location on the St. Lawrence River.
Live animated radar for Cornwall and surroundings — RainViewer.
NOAA GOES-19 GEOCOLOR — Canada / Northern U.S. sector. Auto-refreshes every 10 minutes on page reload. Frames the whole country from Newfoundland to the BC coast, plus adjacent Pacific and Atlantic storm approaches.
Source: NOAA/NESDIS GOES-19 · Public domain · Sector code can (Canada / Northern U.S.) · Auto-updates on page reload
| Location | Cornwall, Stormont, Ontario |
| Coordinates | 45.026389°N, 74.726389°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | K6J |
| Area Code | 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905 |
| Page generated | July 2026 |
| Weather data | Open-Meteo (open-source), Environment and Climate Change Canada |
About This Cornwall, Ontario Weather Page
This page provides live weather conditions and forecasts for Cornwall, Ontario, including current conditions, a 24-hour hourly forecast, 7-day outlook, ECCC extended text forecast, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modelled estimate shown when no station is in range), precipitation radar and NOAA GOES satellite imagery. Additional sections may include marine and fishing conditions with a solunar forecast for coastal localities, and soil temperature, crop weather and live Water Survey of Canada river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Cornwall includes coordinates 45.026389°N, 74.726389°W, situated in Stormont. Postal FSA: K6J. Telephone area code: 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 705, 742, 807, 905. Timezone: Eastern Time (UTC−5 / −4).
Weather data is sourced from Environment and Climate Change Canada (ECCC) and the open-source Open-Meteo API. Aviation data is sourced from aviationweather.gov, with a modelled estimate used where no nearby reporting station is available. River and stream data is sourced from Water Survey of Canada (WSC) via the ECCC GeoMet realtime hydrometric feed. Marine and solunar data are modelled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-19 and is public domain.