Castleton, Ontario Weather
Castleton, 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 Castleton in Northumberland.
Marine forecast and fishing conditions near Castleton.
Flight conditions near Castleton. Data source: locating…
Soil conditions, frost risk and crop weather for Castleton.
About Castleton, Ontario
Castleton is a compact rural community in Northumberland, Ontario, Canada. It is classified as a village / hamlet. Castleton is located at 44.0932°N, 77.9387°W. It observes Eastern Time (UTC−5 / −4). Postal code area: K9A.
Castleton sits perched within the Mays Hill, where the land rises in modest, firm swells above the surrounding countryside. It lies 23.2 km north-east of Cobourg, ON (from Cobourg, ON: bearing 51°T), and is situated 10.5 km north-north-west of Colborne. The air here carries a crisp, clean weight, particularly as the sun begins to retreat and a pale, honeyed light settles over the fields, clarifying the edges of every fence line and farmhouse. While the Trent River flows some 20 km away, the local horizon remains defined by the immediate rise of the hills, providing a sense of seclusion that keeps the world at a polite distance. Nearby, the quiet presence of Little Lake sits 10 km from the village, a cool, dark eye in the landscape that reflects the changing seasons long before they fully arrive in the village streets. Castleton grew from the steady, persistent labor of early settlers who found purpose in the fertile soil and the reliable reach of the local timber. The economy has long leaned upon the seasonal cycles of agriculture, a tradition that anchors the daily life of the residents to the turning of the crops and the demands of the harvest. A short drive away, the Goodrich-Loomis Conservation Area occupies 9 km of the surrounding terrain, serving as a quiet reminder of the wilder, wooded character that once blanketed the region. Life in Castleton persists with a deliberate, grounded quality, where the work of the day is measured by the steady progress of the sun across the hilltops and the familiar sounds of a village that knows its own boundaries well.
Live animated radar for Castleton 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 | Castleton, Northumberland, Ontario |
| Coordinates | 44.09323°N, 77.93866°W |
| Timezone | Eastern Time (UTC−5 / −4) |
| Postal FSA | K9A |
| 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 Castleton, Ontario Weather Page
This page provides live weather conditions and forecasts for Castleton, 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 Castleton includes coordinates 44.093230°N, 77.938660°W, situated in Northumberland. Postal FSA: K9A. 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.