Skip to content | Skip to institutional links

Common menu bar links

Notices:

Several airport weather reporting stations have switched over to new NAV Canada sensors and reporting tools. Please click here and expand the message for the list of new NAV Canada stations with the latest data:

The Notice Inventory contains a record of all past and current Notices.

Statistics listed below are provided as a guide to determine the validity of normals and extremes calculations. For example, a station with 30 years of record between 1971 and 2000 with no missing years would be a more reliable normal than a station with 15 years of record and 2 missing years. Less than 100% possible observations indicates that out of the total number of observations used, some records were missing.

Calculation Information for 1971 to 2000 Canadian Normals Data

Station Name:	TORONTO LESTER B. PEARSON INT'L A
Province:	ONT	Latitude (dd mm):	43 40 N
Country:	CAN	Longitude (ddd mm):	79 38 W
Time Zone:	ETZ	Latitude (decimal degrees):	43.68
Climate Id:	6158733	Longitude (decimal degrees):	-79.63
WMO Id:	71624	Elevation (m):	173.4
TC Id:	YYZ	Station Status:	Active

Precipitation:
Temperature:	Begin Year	End Year	Total No. of Years	Missing Years	Total Count of Observ.	% of Possible Observ.
Daily Average (°C)	1971	2000	30	0	10958	100.0
Standard Deviation	1971	2000	30	0	10958	100.0
Daily Maximum (°C)	1971	2000	30	0	10958	100.0
Daily Minimum (°C)	1971	2000	30	0	10958	100.0
Extreme Maximum (°C)	1937	2002			23367	100.0
Extreme Minimum (°C)	1937	2002			23361	99.9
Rainfall (mm)	1971	2000	30	0	10958	100.0
Snowfall (cm)	1971	2000	30	0	10958	100.0
Precipitation (mm)	1971	2000	30	0	10958	100.0
Average Snow Depth (cm)	1971	2000	30	0	10958	100.0
Median Snow Depth (cm)	1971	2000	30	0	10958	100.0
Snow Depth at Month-end (cm)	1971	2000	30	0	360	100.0
Extreme Daily Rainfall (mm)	1937	2002			23374	100.0
Extreme Daily Snowfall (cm)	1937	2002			23374	100.0
Extreme Daily Precipitation (mm)	1937	2002			23374	100.0
Extreme Snow Depth (cm)	1955	2002			17226	100.0
Days with Maximum Temperature:
<= 0 °C	1971	2000	30	0	10958	100.0
> 0 °C	1971	2000	30	0	10958	100.0
> 10 °C	1971	2000	30	0	10958	100.0
> 20 °C	1971	2000	30	0	10958	100.0
> 30 °C	1971	2000	30	0	10958	100.0
> 35 °C	1971	2000	30	0	10958	100.0
Days with Minimum Temperature:
> 0 °C	1971	2000	30	0	10958	100.0
<= 2 °C	1971	2000	30	0	10958	100.0
<= 0 °C	1971	2000	30	0	10958	100.0
< -2 °C	1971	2000	30	0	10958	100.0
< -10 °C	1971	2000	30	0	10958	100.0
< -20 °C	1971	2000	30	0	10958	100.0
< - 30 °C	1971	2000	30	0	10958	100.0
Days with Rainfall:
>= 0.2 mm	1971	2000	30	0	10958	100.0
>= 5 mm	1971	2000	30	0	10958	100.0
>= 10 mm	1971	2000	30	0	10958	100.0
>= 25 mm	1971	2000	30	0	10958	100.0
Days With Snowfall:
>= 0.2 cm	1971	2000	30	0	10958	100.0
>= 5 cm	1971	2000	30	0	10958	100.0
>= 10 cm	1971	2000	30	0	10958	100.0
>= 25 cm	1971	2000	30	0	10958	100.0
Days with Precipitation:
>= 0.2 mm	1971	2000	30	0	10958	100.0
>= 5 mm	1971	2000	30	0	10958	100.0
>= 10 mm	1971	2000	30	0	10958	100.0
>= 25 mm	1971	2000	30	0	10958	100.0
Days with Snow Depth:
>= 1 cm	1971	2000	30	0	10958	100.0
>= 5 cm	1971	2000	30	0	10958	100.0
>= 10 cm	1971	2000	30	0	10958	100.0
>= 20 cm	1971	2000	30	0	10958	100.0
Wind:
Speed (km/h)	1971	2000	30	0	262843	99.9
Most Frequent Direction	1971	2000	30	0	262840	99.9
Maximum Hourly Speed (km/h)	1953	2002			437782	99.9
Direction of Maximum Hourly Speed
Maximum Gust Speed (km/h)	1955	2001			16994	99.2
Direction of Maximum Gust
Days with Winds >= 52 km/h	1971	2000	30	2	10470	95.6
Days with Winds >= 63 km/h	1971	2000	30	2	10470	95.6
Degree Days:
Above 24 °C	1971	2000	30	0	10958	100.0
Above 18 °C	1971	2000	30	0	10958	100.0
Above 15 °C	1971	2000	30	0	10958	100.0
Above 10 °C	1971	2000	30	0	10958	100.0
Above 5 °C	1971	2000	30	0	10958	100.0
Above 0 °C	1971	2000	30	0	10958	100.0
Below 0 °C	1971	2000	30	0	10958	100.0
Below 5 °C	1971	2000	30	0	10958	100.0
Below 10 °C	1971	2000	30	0	10958	100.0
Below 15 °C	1971	2000	30	0	10958	100.0
Below 18 °C	1971	2000	30	0	10958	100.0
Humidex:
Extreme Humidex	1953	2002			437757	99.9
Days with Humidex >= 30	1971	2000	30	0	262842	99.9
Days with Humidex >= 35	1971	2000	30	0	262842	99.9
Days with Humidex >= 40	1971	2000	30	0	262842	99.9
Wind Chill:
Extreme Wind Chill	1953	2002			437782	99.9
Days with Wind Chill < -20	1971	2000	30	0	262843	99.9
Days with Wind Chill < -30	1971	2000	30	0	262843	99.9
Days with Wind Chill < -40	1971	2000	30	0	262843	99.9
Humidity:
Average Vapour Pressure (kPa)	1971	2000	30	0	262842	99.9
Average Relative Humidity - 0600LST (%)	1971	2000	30	0	10947	99.9
Average Relative Humidity - 1500LST (%)	1971	2000	30	0	10953	100.0
Pressure:
Average Station Pressure (kPa)	1971	2000	30	0	262840	99.9
Average Sea Level Pressure (kPa)	1971	2000	30	0	262840	99.9
Visibility (hours with):
< 1 km	1971	2000	28	4	230280	87.5
1 to 9 km	1971	2000	28	4	230280	87.5
> 9 km	1971	2000	28	4	230280	87.5
Cloud Amount (hours with):
0 to 2 tenths	1971	2000	28	4	229536	87.2
3 to 7 tenths	1971	2000	28	4	229536	87.2
8 to 10 tenths	1971	2000	28	4	229536	87.2

We'd like to hear from you! Please click "Contact Us" to share your comments and suggestions.

Common menu bar links

Institutional links

Proactive Disclosure