Canadian Climate Normals 1981-2010 Station Data

The minimum number of years used to calculate these Normals is indicated by a code for each element. A "+" beside an extreme date indicates that this date is the first occurrence of the extreme value. Values and dates in bold indicate all-time extremes for the location.

Data used in the calculation of these Normals may be subject to further quality assurance checks. This may result in minor changes to some values presented here.

Metadata including Station Name, Province, Latitude, Longitude, Elevation, Climate ID, WMO ID, TC ID
TORONTO BUTTONVILLE A
ONTARIO
Latitude: 43°51'44.000" N Longitude: 79°22'12.000" W Elevation: 198.10 m
Climate ID: 615HMAK WMO ID: 71639 TC ID: YKZ
1981 to 2010 Canadian Climate Normals station data
 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Temperature:
Daily Average (°C)-5.8 -5.6 -0.4 6.7 13 18.6 21.2 20.2 15.7 8.9 3.1 -2.9 7.7 Legend CC
Standard Deviation3.1 2.3 2 1.7 1.8 1.3 1.4 1.4 1.4 1.5 1.6 2.7 1.1 Legend CC
Daily Maximum (°C)-1.5 -0.9 4.5 12.1 19.1 24.6 27.1 26 21.5 14.1 7.2 0.9 12.9 Legend CC
Daily Minimum (°C)-10.1 -10.2 -5.3 1.2 6.8 12.6 15.2 14.3 9.9 3.6 -1.1 -6.8 2.5 Legend CC
Extreme Maximum (°C)14.9 14.9 26 31.7 34.6 36.6 37.2 37.8 34.4 31 22.1 18   Legend
Date
(yyyy/dd)
2005/ 13 2000/ 27 1998/ 30 1990/ 26 2006/ 29 1995/ 19 1988/ 07 2001/ 08 2002/ 09 2007/ 08 1999/ 09 2001/ 06  
Extreme Minimum (°C)-35.2 -25.7 -25.6 -10.6 -2.1 1.9 6.9 4.2 -2 -7.4 -15 -26   Legend
Date
(yyyy/dd)
1994/ 16 1987/ 15 2003/ 03 2003/ 06 1996/ 02 1986/ 03 1988/ 03 1986/ 29 1989/ 27 1988/ 31 1987/ 21 2004/ 20  
Precipitation:
Rainfall (mm)26 22.9 33.6 66.7 79.5 82.8 78.8 76.2 81.8 66.7 68.3 34.2 717.4 Legend CC
Snowfall (cm)38.9 29.9 19.3 7.5 0.1 0 0 0 0 0.6 12.1 34.2 142.6 Legend CC
Precipitation (mm)62.1 50.5 53.2 74.1 79.6 82.8 79 76.2 81.8 68 80 65.7 852.9 Legend CC
Average Snow Depth (cm)9 9 4 0 0 0 0 0 0 0 1 4 2 Legend CC
Median Snow Depth (cm)8 9 3 0 0 0 0 0 0 0 0 3 2 Legend CC
Snow Depth at Month-end (cm)12 6 1 0 0 0 0 0 0 0 0 5 2 Legend CC
Extreme Daily Rainfall (mm)40.4 36.3 38 45.1 64.6 41.6 42.8 71.2 80.3 43 43.7 30.6   Legend
Date
(yyyy/dd)
1995/ 15 1990/ 22 1991/ 27 2009/ 03 2000/ 12 2000/ 13 2009/ 23 1986/ 15 1986/ 10 1995/ 05 1993/ 27 2006/ 01  
Extreme Daily Snowfall (cm)37.4 23.8 22 19.2 1.8 0 0 0 0 6.4 18.5 33.5   Legend
Date
(yyyy/dd)
1999/ 03 2001/ 08 1999/ 06 2009/ 06 2005/ 02 1986/ 01 1986/ 01 1986/ 01 1986/ 01 1997/ 27 1987/ 25 2000/ 12  
Extreme Daily Precipitation (mm)40.4 36.3 38 45.1 64.6 41.6 42.8 71.2 80.3 43 43.7 42.6   Legend
Date
(yyyy/dd)
1995/ 15 1990/ 22 1991/ 27 2009/ 03 2000/ 12 2000/ 13 2009/ 23 1986/ 15 1986/ 10 1995/ 05 1993/ 27 1990/ 03  
Extreme Snow Depth (cm)57 45 44 16 0 0 0 0 0 1 70 43   Legend
Date
(yyyy/dd)
1999/ 16 2001/ 09 2008/ 09 1994/ 07 1986/ 23 1986/ 01 1986/ 01 1986/ 01 1986/ 01 2008/ 29 1986/ 23 1992/ 12  
Days with Maximum Temperature:
<= 0 °C17.8 15.3 7.3 0.58 0 0 0 0 0 0 2 12.8 55.9 Legend CC
> 0 °C13.2 13 23.7 29.4 31 30 31 31 30 31 28 18.2 309.4 Legend CC
> 10 °C0.78 0.54 6.3 18.7 29.9 30 31 31 29.9 24 8.2 1.2 211.4 Legend CC
> 20 °C0 0 0.70 3 12.3 24.6 30.3 29.5 18.7 4.1 0.16 0 123.3 Legend CC
> 30 °C0 0 0 0.13 0.79 4 7 4.3 0.84 0.04 0 0 17 Legend CC
> 35 °C0 0 0 0 0 0.20 0.60 0.32 0 0 0 0 1.1 Legend CC
Days with Minimum Temperature:
> 0 °C2.4 1 5.1 17.5 29.5 30 31 31 29.6 24 12.2 3.3 216.7 Legend CC
<= 2 °C30.3 28.2 28.5 18.2 4.5 0.04 0 0 1 11.9 22.9 30 175.5 Legend CC
<= 0 °C28.6 27.2 25.9 12.5 1.5 0 0 0 0.40 7 17.8 27.7 148.5 Legend CC
< -2 °C26 25.3 21.2 6.6 0.04 0 0 0 0 2.4 11.8 23 116.3 Legend CC
< -10 °C14.8 14.2 6.4 0.08 0 0 0 0 0 0 1.1 8.5 45 Legend CC
< -20 °C3.4 1.8 0.26 0 0 0 0 0 0 0 0 0.64 6.1 Legend CC
< - 30 °C0.09 0 0 0 0 0 0 0 0 0 0 0 0.09 Legend CC
Days with Rainfall:
>= 0.2 mm5.8 3.8 6.7 10.8 12 11.8 11.2 9.9 10.8 13 11.3 6.6 113.7 Legend CC
>= 5 mm1.8 1.5 2.3 4.8 4.9 5.3 5 4.4 4.7 4.4 3.8 2.5 45.4 Legend CC
>= 10 mm0.71 0.79 1.1 1.9 2.7 3.1 2.8 2.6 2.8 2 2.4 1.1 24 Legend CC
>= 25 mm0.08 0.17 0.09 0.29 0.63 0.48 0.68 0.52 0.64 0.24 0.32 0.12 4.3 Legend CC
Days With Snowfall:
>= 0.2 cm13.4 10.8 7 2.9 0.13 0 0 0 0 0.48 4.7 10.8 50.2 Legend CC
>= 5 cm2.5 2 0.96 0.42 0 0 0 0 0 0.04 0.68 1.8 8.3 Legend CC
>= 10 cm0.79 0.50 0.43 0.17 0 0 0 0 0 0 0.24 0.64 2.8 Legend CC
>= 25 cm0.04 0 0 0 0 0 0 0 0 0 0 0.12 0.16 Legend CC
Days with Precipitation:
>= 0.2 mm16.7 12.9 12 12.3 12 11.8 11.2 9.9 10.8 13.2 14.5 15.3 152.7 Legend CC
>= 5 mm4.3 3.3 3.4 5.3 4.9 5.3 5 4.4 4.7 4.5 4.6 4 53.5 Legend CC
>= 10 mm1.5 1.2 1.6 2.2 2.7 3.1 2.8 2.6 2.8 2.1 2.7 1.9 27.2 Legend CC
>= 25 mm0.13 0.17 0.09 0.33 0.63 0.48 0.68 0.52 0.64 0.24 0.40 0.28 4.6 Legend CC
Days with Snow Depth:
>= 1 cm21.3 22.7 11 1 0 0 0 0 0 0.04 2.8 15.8 74.6 Legend CC
>= 5 cm16.2 17.7 6.8 0.43 0 0 0 0 0 0 1.1 8.4 50.6 Legend CC
>= 10 cm11 11.3 3.9 0.17 0 0 0 0 0 0 0.58 4.7 31.6 Legend CC
>= 20 cm4.6 3.9 1.1 0 0 0 0 0 0 0 0.04 1.8 11.4 Legend CC
Wind:
Speed (km/h)14 13.9 13.8 13.9 12.3 11.4 10.7 10 10.6 11.6 12.9 13.4 12.4 Legend CC
Most Frequent DirectionSW W NW NW NW NW NW N N W W W NW Legend CC
Maximum Hourly Speed (km/h)65 65 67 56 57 50 65 56 52 56 80 54   Legend
Date
(yyyy/dd)
1989/ 08 1987/ 08 1991/ 28 1995/ 04 2010/ 08 1988/ 05 1999/ 24 1992/ 10 1989/ 23 1996/ 30 1991/ 30 1991/ 15  
Direction of Maximum Hourly SpeedW NW SW NW NW NW NW NW NW SW SW W SW Legend
Maximum Gust Speed (km/h)111 100 111 89 87 111 135 102 83 104 111 93   Legend
Date
(yyyy/dd)
1992/ 14 1997/ 27 2002/ 09 2001/ 12 1990/ 17 1986/ 16 1995/ 15 1987/ 16 2000/ 20 1999/ 13 1991/ 30 1991/ 14  
Direction of Maximum GustN SW S S SW W NW W NW NW SW W NW Legend
Days with Winds >= 52 km/h0.8 0.9 0.9 0.6 0.4 0.4 0.2 0.3 0.2 0.4 0.9 0.6 6.7 Legend CC
Days with Winds >= 63 km/h0.2 0.2 0.3 0.1 0 0.2 0.1 0.1 0 0.2 0.4 0.1 1.9 Legend CC
Degree Days:
Above 24 °C0 0 0 0 0.3 4.1 11.9 6.4 0.8 0 0 0 23.5 Legend CC
Above 18 °C0 0 0 1.3 13.2 56.2 104.4 82.5 21.8 1.1 0 0 280.5 Legend CC
Above 15 °C0 0 0.3 4.4 33.6 119.3 191.7 161.9 60.5 5.8 0 0 577.5 Legend CC
Above 10 °C0.1 0 2.7 22.8 112 259 346.2 315.6 175.3 38.6 3.5 0.2 1275.9 Legend CC
Above 5 °C2 0.6 17.6 86.9 248.3 408.8 501.2 470.6 320.9 130.8 30 3.4 2220.9 Legend CC
Above 0 °C17 11.2 68.3 209.2 402.7 558.8 656.2 625.6 470.9 275.5 111.9 27.9 3435.2 Legend CC
Below 0 °C196.6 168.4 76.6 4.6 0 0 0 0 0 0.2 19.4 118.6 584.2 Legend CC
Below 5 °C336.5 299 180.9 32.2 0.5 0 0 0 0 10.4 87.5 249 1196.2 Legend CC
Below 10 °C489.6 439.7 321 118.2 19.3 0.2 0 0 4.4 73.2 211 400.8 2077.5 Legend CC
Below 15 °C644.5 581 473.6 249.8 95.8 10.6 0.4 1.3 39.6 195.5 357.6 555.6 3205.3 Legend CC
Below 18 °C737.5 665.7 566.3 336.7 168.5 37.4 6.2 15 90.9 283.7 447.5 648.6 4004 Legend CC
Humidex:
Extreme Humidex16 14.4 29.2 35.7 41 44.6 50.9 47.4 43.6 37.8 24.9 20.6   Legend
Date
(yyyy/dd)
2005/ 13 2000/ 27 1998/ 30 1990/ 25 2006/ 29 1994/ 15 1995/ 14 2006/ 01 1991/ 16 2007/ 08 1990/ 03 1998/ 07  
Days with Humidex >= 300 0 0 0.4 3.5 10.1 17.1 14.5 5.4 0.6 0 0 51.6 Legend CC
Days with Humidex >= 350 0 0 0.1 0.7 4.3 7.6 5.8 1.2 0.1 0 0 19.8 Legend CC
Days with Humidex >= 400 0 0 0 0.1 0.7 2.2 1.3 0.1 0 0 0 4.4 Legend CC
Wind Chill:
Extreme Wind Chill-42.6 -37.4 -35.6 -18.6 -4.4 0 0 0 -4.2 -8.8 -23.9 -36.6   Legend
Date
(yyyy/dd)
1994/ 16 1995/ 05 2003/ 03 1995/ 05 2004/ 04 1986/ 01 1986/ 01 1986/ 01 1989/ 27 1988/ 31 1987/ 21 1989/ 22  
Days with Wind Chill < -209.3 7.9 2.4 0 0 0 0 0 0 0 0.1 4 23.7 Legend CC
Days with Wind Chill < -301.8 0.5 0.2 0 0 0 0 0 0 0 0 0.3 2.8 Legend CC
Days with Wind Chill < -400.1 0 0 0 0 0 0 0 0 0 0 0 0.1 Legend CC
Humidity:
Average Vapour Pressure (kPa)0.4 0.3 0.5 0.7 1 1.5 1.7 1.7 1.4 0.9 0.6 0.4 0.9 Legend CC
Average Relative Humidity - 0600LST (%)79.6 77.6 77.2 76.1 77.9 79.3 82.5 87.4 89.6 87.6 85.1 82.1 81.8 Legend CC
Average Relative Humidity - 1500LST (%)69.6 64 57.8 52.9 52.3 53.9 53.4 55.9 59.2 62.4 68.9 71.1 60.1 Legend CC
Pressure:
Average Station Pressure (kPa)99.2 99.3 99.3 99.1 99.1 99.1 99.1 99.3 99.3 99.3 99.3 99.3 99.2 Legend CC
Average Sea Level Pressure (kPa)101.7 101.7 101.7 101.5 101.5 101.4 101.4 101.6 101.7 101.7 101.7 101.7 101.6 Legend CC
Visibility (hours with):
< 1 km16.2 12 11.1 6.2 7.2 5.8 2.4 1.8 5.4 7.4 12.4 13.6 101.5 Legend DD
1 to 9 km150.6 116.7 96.7 80.6 61.7 71.3 72.3 77.4 79.4 80.4 103.8 126.9 1117.7 Legend DD
> 9 km577.2 550.2 636.2 633.2 675.1 642.9 669.4 664.9 635.3 656.2 603.7 603.5 7547.6 Legend DD
Cloud Amount (hours with):
0 to 2 tenths132.4 152.6 216 186.2 209.8 192.6 199.7 240.7 236.5 176.9 117.1 120.2 2180.6 Legend DD
3 to 7 tenths101.6 109.8 128.2 129.5 162.3 197.6 231.5 213.8 167 150.8 124.4 101.3 1817.7 Legend DD
8 to 10 tenths510 416.5 399.8 404.3 371.9 329.8 312.9 289.6 316.5 416.3 478.5 522.5 4768.5 Legend DD
1981 to 2010 Canadian Climate Normals station data (Frost-Free)
Frost-Free:Code
Average Date of Last Spring Frost May 05 LegendCC
Average Date of First Fall Frost October 10 LegendCC
Average Length of Frost-Free Period 157 Days LegendCC
Probability of last temperature in spring of 0 °C or lower on or after indicated dates 10% 25% 33% 50% 66% 75% 90%
DateMay 18May 11May 09May 05May 02Apr 29Apr 25
Probability of first temperature in fall of 0 °C or lower on or after indicated dates 10% 25% 33% 50% 66% 75% 90%
DateSep 25Oct 01Oct 03Oct 10Oct 15Oct 21Oct 27
Probability of frost-free period equal to or less than indicated period (Days) 10% 25% 33% 50% 66% 75% 90%
Days139146148157160166181
Legend
  • A = WMO "3 and 5 rule" (i.e. no more than 3 consecutive and no more than 5 total missing for either temperature or precipitation)
  • B = At least 25 years
  • C = At least 20 years
  • D = At least 15 years