TAO weather

 Latitude N 43° 39' 36"    Longitude W 79° 24' 00"    Elevation 0 m

Dawn: 10:56 Sunrise: 11:25 Moonrise: 23:53 Moon
Dusk: 23:13 Sunset:  22:44 Moonset: 14:45
Daylight: 12:16 Day length: 11:18 Moon Phase: Waning Gibbous

Welcome to University of Toronto Atmospheric Observatory.

The weather station in use is the Davis Vantage Pro2, and these pages are updated every 5 minute. The meteorological day used at this station ends at midnight UTC.

This weather station is part of the University of Toronto Atmospheric Observatory, or "TAO" for short. This observatory does remote sensing of the atmosphere using a Fourier Transform Infrared Spectrometer which can detect the absorption of sunlight by gases in the atmosphere species. This project is led by Professor Kimberly Strong, who also conducts similar research in Eureka, Nunavut at the Polar Environment Atmospheric Research Laboratory "PEARL".

The TAO weather station is located at the McLennan Physical Laboratory, 60 St George St Toronto, ON, CANADA, at 43.66° North Latitude and 79.4° West Longitude. The station resides on the rooftop of the building at 174 m above sea level (61 m above street level) and the pressure reading is NOT adjusted to sea level. Please note that the wind sensor is installed on the south east corner and will be influenced by obstructions on the roof (astronomical domes, radio antenna and building itself).

Forecast: Increasing clouds with little temperature change.

Conditions at UTC time 23:05 on 09 October 2025
Temperature and Humidity
Temperature 10.2 °C Dew Point 1.3 °C
Windchill 10.2 °C Humidity 54%
Heat Index 10.2 °C Apparent Temperature 6.9 °C
Solar Radiation 0 W/m² Evapotranspiration Today 2.74 mm
Rainfall
Rainfall Today 0.0 mm Rainfall Rate 0.0 mm/hr
Rainfall This Month 8.8 mm Rainfall This Year 401.8 mm
Rainfall Last Hour 0.0 mm Last rainfall 2025-10-07 23:13
Wind
Wind Speed (gust) 4.9 m/s Wind Speed (avg) 2.2 m/s
Wind Bearing 120° ESE Beaufort F2 Light breeze
Pressure
Barometer  1011.72 mb Falling slowly -0.30 mb/hr
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