Jefferson, Ontario Weather
Jefferson, 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 Jefferson in York.
Marine forecast and fishing conditions near Jefferson.
Flight conditions near Jefferson. Data source: locating…
Soil conditions, frost risk and crop weather for Jefferson.
About Jefferson, Ontario
Jefferson is a compact rural community in York, Ontario, Canada. It is classified as a village / hamlet. Jefferson is located at 43.9203°N, 79.4526°W. It observes Eastern Time (UTC−5 / −4). Postal code area: L4E.
Jefferson rests upon the quiet, rolling terrain of York, defined by a landscape that holds the weight of the sky in its open fields and stands of trees. It lies 10.0 km north-east of Vaughan, ON (from Vaughan, ON: bearing 41°T), and is situated 15.9 km west-north-west of Markham. The air here carries a crisp, terrestrial clarity, particularly as the sun begins to retreat behind The Pinnacles, casting long, bruised shadows across the earth. Just a short distance away, the surface of Philips Lake remains a dark, still mirror, absorbing the fading light while the land settles into the evening. The East Humber River tracks its path through the lower reaches of the geography, carving a subtle, persistent line that dictates the slow drainage of the fields and the movement of the local wildlife. The history of Jefferson is marked by a steady, pragmatic development, shifting from the early pressures of agriculture to the modern patterns of a residential corridor. Life in Jefferson follows the movement of traffic and the seasonal cycles of the Ontario climate, with the nearby Parc urbain national du Canada de la Rouge providing a vast, protected backdrop that anchors the region to its natural roots. Economic activity here is quiet and functional, tied to the professional and service sectors that support the growth of the surrounding metropolitan edge. Despite the encroaching pace of modern expansion, a sense of stillness persists, found in the way the wind moves through the vegetation and the consistent, grounded presence of the landscape.
Live animated radar for Jefferson 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 | Jefferson, York, Ontario |
| Coordinates | 43.9203°N, 79.45263°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | L4E |
| 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 Jefferson, Ontario Weather Page
This page provides live weather conditions and forecasts for Jefferson, 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 Jefferson includes coordinates 43.920300°N, 79.452630°W, situated in York. Postal FSA: L4E. 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.