Alliston, Ontario Weather
Alliston, 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 Alliston in Simcoe.
Marine forecast and fishing conditions near Alliston.
Flight conditions near Alliston. Data source: locating…
Soil conditions, frost risk and crop weather for Alliston.
About Alliston, Ontario
Alliston is a urban community in Simcoe, Ontario, Canada. It is classified as a town. Alliston is located at 44.1536°N, 79.8642°W. It observes Eastern Time (UTC−5 / −4). Postal code area: L9R.
Alliston sits quietly upon the landscape, anchored by the steady, persistent presence of the Boyne River as it winds through the terrain near the rise of Sharps Hill. It lies 28.4 km south-south-west of Barrie, ON (from Barrie, ON: bearing 212°T), and is situated 11.0 km north-west of New Tecumseth. The air here holds a particular clarity, especially as the late afternoon light catches the slopes of Sharps Hill, casting long, soft shadows that trace the contours of the surrounding fields. The Boyne River defines the movement of the land, its current providing a subtle pulse that carries through the quiet streets and open spaces. Long established as a hub for the surrounding agricultural lands, Alliston maintains a character rooted in the productivity of its soil and the industrious nature of its people. Large-scale manufacturing operations now share space with the traditional rhythms of farming, creating an economy that balances regional heritage with modern industrial activity. Throughout the year, the atmosphere remains steady and grounded, shaped by the seasonal shifts that dictate the pace of life in this part of the country.
Live animated radar for Alliston 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 | Alliston, Simcoe, Ontario |
| Coordinates | 44.153611°N, 79.864167°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | L9R |
| 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 Alliston, Ontario Weather Page
This page provides live weather conditions and forecasts for Alliston, 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 Alliston includes coordinates 44.153611°N, 79.864167°W, situated in Simcoe. Postal FSA: L9R. 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.