Sources & methodology

“Updated at” is publication time. Each source keeps its own valid time and collection time. Toronto is the only public forecast location label.

Open-Meteo

Coordinate-based model estimate and best-match forecast. Resolution varies; not a station observation.

Status: available. Last successful check: 2026-11-09T14:00:07.001Z.

ECCC Canadian AQHI

Regional observation: Toronto (FEUZB). Official AQHI rounded to the nearest integer; no US AQI substitution.

Status: available. Last successful check: 2026-11-09T14:00:07.001Z.

ECCC Toronto alerts

Official City of Toronto alert feed. Atom feed does not supply CAP severity/urgency; unknown metadata is retained, with provider order preserved.

Status: available. Last successful check: 2026-11-09T14:00:07.001Z.

Historical context

TORONTO / 6158350. Available record: 1840–2025 (available station record; not city-wide all-time records). Calendar-date averages use 1971–2000, and are labelled Average rather than official normals. Baseline high 30/30; low 30/30. Missing and flagged values excluded. Tied years are retained. February 29 uses only actual leap-day observations; no neighbouring-day substitution.

ECCC historical station archive

Reading the hourly chart

The solid line shows recent model estimates, not thermometer observations. The dashed line shows forecasts after NOW. Icons show the provider’s expected condition each hour, including day/night state when supplied. Rain timings are approximate hourly forecasts, not exact start or stop times.

Clothing

The main outfit uses the daytime minimum plus 80% of the range, with a +2°C warmth preference. Apparent temperatures influence removable layers once. After 8 PM, clothing refers to tomorrow.

Risk and freshness

UV: 0–2 Low; 3–5 Moderate; 6–7 High; 8–10 Very high; 11+ Extreme. AQHI: 1–3 Low; 4–6 Moderate; 7–10 High; above 10 Very high. Smoke is never inferred from AQHI.

Current estimates are stale after 60 minutes; forecast collection after two hours; AQHI after three hours and unavailable after six; alert checks after 30 minutes. A failed alert check does not mean no alerts.

Attribution and licence

Forecast data: Open-Meteo, CC BY 4.0. Noncommercial free API. Canadian observations and alerts: ECCC Open Data. Share Tech Mono: Carrois Type Design, SIL Open Font License, bundled with the font.

Snapshot 6e0e4d86-241c-4641-90a3-8a32958f1038 · Schema 1 · Rules 1.0.0