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
PORT COLBORNE *
ONTARIO
Latitude: 42°53'00.000" N Longitude: 79°15'00.000" W Elevation: 175.30 m
Climate ID: 6136606 WMO ID: TC ID:

* This station meets WMO standards for temperature and precipitation.

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)-3.7 -2.9 0.8 7 13.2 18.7 21.9 21.3 17.4 11 5.5 -0.4 9.2 Legend AA
Standard Deviation2.8 2.2 1.5 1.3 1.7 1.3 1.2 1.2 1.2 1.2 1.3 2.6 0.9 Legend AA
Daily Maximum (°C)-0.4 0.6 4.8 11.5 17.9 23.1 25.9 25.4 21.3 14.8 8.7 2.7 13 Legend AA
Daily Minimum (°C)-6.9 -6.5 -3.2 2.4 8.5 14.4 17.8 17.2 13.4 7.3 2.2 -3.4 5.3 Legend AA
Extreme Maximum (°C)15 16 24 32.5 31.5 33.5 35 33 31 27.2 20 18   Legend
Date
(yyyy/dd)
2005/ 13 1981/ 22 1990/ 15 1990/ 28 2006/ 30 1995/ 20 2005/ 12 1988/ 02 2000/ 01 1971/ 03 1977/ 03 2001/ 05  
Extreme Minimum (°C)-26 -25 -24 -11.5 -3.5 2.2 6 5 -0.5 -6.1 -11.5 -26   Legend
Date
(yyyy/dd)
1981/ 04 1979/ 18 1980/ 01 1982/ 07 1978/ 01 1972/ 11 2001/ 02 1982/ 28 1993/ 30 1965/ 29 1987/ 21 1980/ 25  
Precipitation:
Rainfall (mm)32.5 26.9 46.6 71.9 89.1 78.9 82.2 82.5 98 89.7 95.2 53.2 846.8 Legend AA
Snowfall (cm)40.5 30.1 20.2 4.2 0.6 0 0 0 0 0.8 5.8 35.6 137.7 Legend AA
Precipitation (mm)73.1 57 66.8 76.1 89.7 78.9 82.2 82.5 98 90.4 100.9 88.8 984.6 Legend AA
Extreme Daily Rainfall (mm)46.5 29.5 34.8 39 41 108.7 74 102 96 72.6 78.2 38.6   Legend
Date
(yyyy/dd)
1998/ 07 1976/ 21 1991/ 27 1996/ 12 2004/ 22 1968/ 25 2004/ 30 2005/ 30 2004/ 08 1995/ 05 1985/ 04 1986/ 02  
Extreme Daily Snowfall (cm)40.6 33.5 27 16.8 10.2 0 0 0 0 13 39.1 30.5   Legend
Date
(yyyy/dd)
1966/ 22 1972/ 19 2004/ 16 1975/ 04 1989/ 06 1965/ 01 1964/ 01 1964/ 01 1964/ 01 2006/ 12 1969/ 19 2001/ 24  
Extreme Daily Precipitation (mm)46.5 33.5 34.8 39 41 108.7 74 102 96 72.6 78.2 38.6   Legend
Date
(yyyy/dd)
1998/ 07 1972/ 19 1991/ 27 1996/ 12 2004/ 22 1968/ 25 2004/ 30 2005/ 30 2004/ 08 1995/ 05 1985/ 04 1986/ 02  
Extreme Snow Depth (cm)35 12 32 17 0 0 0 0 0 20 7 15   Legend
Date
(yyyy/dd)
1996/ 03 2002/ 27 1998/ 23 2005/ 04 1983/ 01 1983/ 01 1983/ 01 1983/ 01 1983/ 01 2006/ 13 2005/ 26 1995/ 20  
Days with Maximum Temperature:
<= 0 °C15.7 13 6.6 0.27 0 0 0 0 0 0 0.92 9 45.5 Legend CC
> 0 °C15.3 15.2 24.4 29.7 31 30 31 31 30 31 29.1 22 319.7 Legend CC
> 10 °C0.72 0.79 5.8 16.6 29.1 30 31 31 30 25.5 11 1.9 213.3 Legend CC
> 20 °C0 0 0.28 2.2 10 22.5 30.4 29.7 18.2 3.2 0 0 116.6 Legend CC
> 30 °C0 0 0 0.04 0.04 0.81 1.1 0.88 0.12 0 0 0 3 Legend CC
> 35 °C0 0 0 0 0 0 0 0 0 0 0 0 0 Legend CC
Days with Minimum Temperature:
> 0 °C3.7 3.1 7.7 21 30.7 30 31 31 30 29.4 19 8 244.6 Legend CC
<= 2 °C29.8 27.6 27.7 14.8 1.7 0 0 0 0.09 5 16.2 26.7 149.7 Legend CC
<= 0 °C27.3 25.2 23.3 9 0.35 0 0 0 0 1.6 11 23 120.7 Legend CC
< -2 °C22.1 20.2 16.2 2.6 0 0 0 0 0 0.16 4.4 16.5 82.1 Legend CC
< -10 °C8.8 7.3 3 0.04 0 0 0 0 0 0 0.12 4 23.2 Legend CC
< -20 °C0.52 0.20 0 0 0 0 0 0 0 0 0 0 0.72 Legend CC
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 Legend CC
Days with Rainfall:
>= 0.2 mm6.2 5.3 8.7 13.2 13.3 11.2 10.6 10.3 11.8 13.4 13.9 9 127.1 Legend AA
>= 5 mm2.2 2.2 3.5 4.7 5.9 5 4.4 4.4 5.2 5.8 6.4 3.5 53.1 Legend AA
>= 10 mm1 0.92 1.4 2.5 3 3 2.9 2.9 3.2 3.2 3.2 1.7 28.7 Legend AA
>= 25 mm0.08 0.04 0.08 0.23 0.58 0.60 0.73 0.81 0.88 0.48 0.48 0.28 5.3 Legend AA
Days With Snowfall:
>= 0.2 cm9.6 6.6 4.5 1.4 0.08 0 0 0 0 0.12 1.9 7.1 31.3 Legend AA
>= 5 cm2.9 2.2 1.7 0.27 0.08 0 0 0 0 0.04 0.36 2.9 10.4 Legend AA
>= 10 cm1 0.84 0.58 0.08 0.04 0 0 0 0 0.04 0.12 1.2 3.9 Legend AA
>= 25 cm0.08 0.08 0.04 0 0 0 0 0 0 0 0 0.04 0.24 Legend AA
Days with Precipitation:
>= 0.2 mm15.2 11.1 12.5 13.8 13.3 11.2 10.6 10.3 11.8 13.4 15.1 14.9 153.2 Legend AA
>= 5 mm5.2 4.4 5.2 4.9 5.9 5 4.4 4.4 5.2 5.8 7 6.6 63.9 Legend AA
>= 10 mm2.1 1.8 2 2.5 3 3 2.9 2.9 3.2 3.2 3.4 2.9 32.9 Legend AA
>= 25 mm0.16 0.12 0.19 0.23 0.58 0.60 0.73 0.81 0.88 0.48 0.48 0.32 5.6 Legend AA
Days with Snow Depth:
>= 1 cm22 0 12 0.57 0 0 0 0 0 0.06 0.29 2 0 Legend
>= 5 cm17 0 6.5 0.14 0 0 0 0 0 0.06 0.29 1 0 Legend
>= 10 cm9 0 4 0.14 0 0 0 0 0 0.06 0 0 0 Legend
>= 20 cm2 0 2 0 0 0 0 0 0 0.06 0 0 0 Legend
Degree Days:
Above 24 °C0 0 0 0 0 2 8.9 8.1 1.3 0 0 0 20.3 Legend CC
Above 18 °C0 0 0 0.5 6.4 55.4 122.9 110.5 40.5 2.8 0 0 339 Legend CC
Above 15 °C0 0 0 2.4 26.2 121 213 198.4 93.7 13.9 0.2 0 668.7 Legend CC
Above 10 °C0 0 1.4 19.9 113.3 262.3 367.8 352.6 223.6 71.7 11.1 0.9 1424.7 Legend CC
Above 5 °C2.1 1.4 16.7 85.1 254.2 412.3 522.8 507.6 372.2 189.5 60.2 10.4 2434.3 Legend CC
Above 0 °C23.8 21.9 74.4 210.4 408.9 562.3 677.8 662.6 522.2 342.1 169.6 57.4 3733.2 Legend CC
Below 0 °C137 108.1 51.4 2.5 0 0 0 0 0 0 5.6 69.9 374.5 Legend CC
Below 5 °C270.3 228.6 148.7 27.2 0.3 0 0 0 0 2.5 46.2 177.9 901.6 Legend CC
Below 10 °C423.2 368.3 288.4 112 14.4 0.1 0 0 1.5 39.6 147.1 323.5 1718 Legend CC
Below 15 °C578.2 509.3 442 244.5 82.3 8.8 0.2 0.7 21.6 136.8 286.2 477.5 2788 Legend CC
Below 18 °C671.2 593.9 535 332.6 155.5 33.2 3.2 5.9 58.3 218.7 376.1 570.5 3553.9 Legend CC
1981 to 2010 Canadian Climate Normals station data (Frost-Free)
Frost-Free:Code
Average Date of Last Spring Frost April 25 LegendCC
Average Date of First Fall Frost October 26 LegendCC
Average Length of Frost-Free Period 182 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 09May 03Apr 29Apr 28Apr 24Apr 22Apr 14
Probability of first temperature in fall of 0 °C or lower on or after indicated dates 10% 25% 33% 50% 66% 75% 90%
DateOct 08Oct 16Oct 19Oct 24Oct 30Nov 04Nov 07
Probability of frost-free period equal to or less than indicated period (Days) 10% 25% 33% 50% 66% 75% 90%
Days159165172183188191196
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