Thornhill, Ontario Weather
Thornhill, 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, soil and crop conditions for Thornhill in York.
Marine forecast and fishing conditions near Thornhill.
Flight conditions near Thornhill. Data source: locating…
Soil conditions, frost risk and crop weather for Thornhill.
About Thornhill, Ontario
Thornhill is a compact rural community in York, Ontario, Canada. It is classified as a small locality. Thornhill is located at 43.8169°N, 79.4268°W. It observes Eastern Time (UTC−5 / −4). Postal code area: L4J.
Thornhill sits nestled within a landscape defined by the quiet elevation of Heise Hill, where the land holds the light of late afternoon with a particular, lingering clarity. It lies 9.4 km north-north-west of Toronto, ON (from Toronto, ON: bearing 333°T), and is situated 14.7 km west-south-west of Markham. The terrain here reflects a subtle transition between the rolling fields that once defined the region and the encroaching suburban growth that now marks the horizon. While the East Humber River flows some 12 km away, the air in Thornhill carries a persistent, crisp dryness that feels distinct from the damp shadows of the valley floors. Evenings bring a coolness that settles over the pavement, turning the suburban streets into quiet corridors where the distance to the distant Parc urbain national du Canada de la Rouge, located 20 km away, feels like a vast, silent promise of wilder spaces. The history of Thornhill mirrors the slow, steady expansion of the province, evolving from its early agricultural roots into a hub of modern commerce and residential life. Long before the current clusters of homes and businesses took shape, the ground beneath Thornhill supported a way of life deeply connected to the seasonal cycles of the earth. Today, the economy thrives on a blend of professional services and retail, maintaining a pace that values efficiency while still observing the modest, domestic traditions of its residents. Though Philips Lake lies 12 km away, the local character is shaped less by proximity to water and more by the steady, focused movement of people navigating their daily routines. Thornhill continues to preserve a sense of identity that balances its colonial past with the practical demands of a contemporary, working population.
Live animated radar for Thornhill 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 | Thornhill, York, Ontario |
| Coordinates | 43.81687°N, 79.4268°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | L4J |
| 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 Thornhill, Ontario Weather Page
This page provides live weather conditions and forecasts for Thornhill, 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 Thornhill includes coordinates 43.816870°N, 79.426800°W, situated in York. Postal FSA: L4J. 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.