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.

Temperature
1981 to 2010 Canadian Climate Normals station data
Temperature
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Daily Average (°C) -3.7 -2.9 0.8 7.0 13.2 18.7 21.9 21.3 17.4 11.0 5.5 -0.4 9.2 A
Standard Deviation 2.8 2.2 1.5 1.3 1.7 1.3 1.2 1.2 1.2 1.2 1.3 2.6 0.9 A
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 13.0 A
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 A
Extreme Maximum (°C) 15.0 16.0 24.0 32.5 31.5 33.5 35.0 33.0 31.0 27.2 20.0 18.0
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) -26.0 -25.0 -24.0 -11.5 -3.5 2.2 6.0 5.0 -0.5 -6.1 -11.5 -26.0
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
1981 to 2010 Canadian Climate Normals station data
Precipitation
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Rainfall (mm) 32.5 26.9 46.6 71.9 89.1 78.9 82.2 82.5 98.0 89.7 95.2 53.2 846.8 A
Snowfall (cm) 41 30 20 4 1 0 0 0 0 1 6 36 138 A
Precipitation (mm) 73.1 57.0 66.8 76.1 89.7 78.9 82.2 82.5 98.0 90.4 100.9 88.8 984.6 A
Extreme Daily Rainfall (mm) 46.5 29.5 34.8 39.0 41.0 108.7 74.0 102.0 96.0 72.6 78.2 38.6
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) 41 34 27 17 10 0 0 0 0 13 39 31
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 39.0 41.0 108.7 74.0 102.0 96.0 72.6 78.2 38.6
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
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
1981 to 2010 Canadian Climate Normals station data
Days with Maximum Temperature
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
<= 0 °C 15.7 13.0 6.6 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.9 9.0 45.5 C
> 0 °C 15.3 15.2 24.4 29.7 31.0 30.0 31.0 31.0 30.0 31.0 29.1 22.0 319.7 C
> 10 °C 0.7 0.8 5.8 16.6 29.1 30.0 31.0 31.0 30.0 25.5 11.0 1.9 213.3 C
> 20 °C 0.0 0.0 0.3 2.2 10.0 22.5 30.4 29.7 18.2 3.2 0.0 0.0 116.6 C
> 30 °C 0.0 0.0 0.0 0.0 0.0 0.8 1.1 0.9 0.1 0.0 0.0 0.0 3.0 C
> 35 °C 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 C
Days with Minimum Temperature
1981 to 2010 Canadian Climate Normals station data
Days with Minimum Temperature
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
> 0 °C 3.7 3.1 7.7 21.0 30.7 30.0 31.0 31.0 30.0 29.4 19.0 8.0 244.6 C
<= 2 °C 29.8 27.6 27.7 14.8 1.7 0.0 0.0 0.0 0.1 5.0 16.2 26.7 149.7 C
<= 0 °C 27.3 25.2 23.3 9.0 0.4 0.0 0.0 0.0 0.0 1.6 11.0 23.0 120.7 C
< -2 °C 22.1 20.2 16.2 2.6 0.0 0.0 0.0 0.0 0.0 0.2 4.4 16.5 82.1 C
< -10 °C 8.8 7.3 3.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 4.0 23.2 C
< -20 °C 0.5 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 C
< - 30 °C 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 C
Days with Rainfall
1981 to 2010 Canadian Climate Normals station data
Days with Rainfall
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
>= 0.2 mm 6.2 5.3 8.7 13.2 13.3 11.2 10.6 10.3 11.8 13.4 13.9 9 127.1 A
>= 5 mm 2.2 2.2 3.5 4.7 5.9 5 4.4 4.4 5.2 5.8 6.4 3.5 53.1 A
>= 10 mm 1 0.92 1.4 2.5 3 3 2.9 2.9 3.2 3.2 3.2 1.7 28.7 A
>= 25 mm 0.08 0.04 0.08 0.23 0.58 0.60 0.73 0.81 0.88 0.48 0.48 0.28 5.3 A
Days With Snowfall
1981 to 2010 Canadian Climate Normals station data
Days With Snowfall
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
>= 0.2 cm 9.6 6.6 4.5 1.4 0.08 0 0 0 0 0.12 1.9 7.1 31.3 A
>= 5 cm 2.9 2.2 1.7 0.27 0.08 0 0 0 0 0.04 0.36 2.9 10.4 A
>= 10 cm 1 0.84 0.58 0.08 0.04 0 0 0 0 0.04 0.12 1.2 3.9 A
>= 25 cm 0.08 0.08 0.04 0 0 0 0 0 0 0 0 0.04 0.24 A
Days with Precipitation
1981 to 2010 Canadian Climate Normals station data
Days with Precipitation
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
>= 0.2 mm 15.2 11.1 12.5 13.8 13.3 11.2 10.6 10.3 11.8 13.4 15.1 14.9 153.2 A
>= 5 mm 5.2 4.4 5.2 4.9 5.9 5.0 4.4 4.4 5.2 5.8 7.0 6.6 63.9 A
>= 10 mm 2.1 1.8 2.0 2.5 3.0 3.0 2.9 2.9 3.2 3.2 3.4 2.9 32.9 A
>= 25 mm 0.2 0.1 0.2 0.2 0.6 0.6 0.7 0.8 0.9 0.5 0.5 0.3 5.6 A
Days with Snow Depth
1981 to 2010 Canadian Climate Normals station data
Days with Snow Depth
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
>= 1 cm 22 0 12 0.57 0 0 0 0 0 0.06 0.29 2 0
>= 5 cm 17 0 6.5 0.14 0 0 0 0 0 0.06 0.29 1 0
>= 10 cm 9 0 4 0.14 0 0 0 0 0 0.06 0 0 0
>= 20 cm 2 0 2 0 0 0 0 0 0 0.06 0 0 0
Degree Days
1981 to 2010 Canadian Climate Normals station data
Degree Days
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Above 24 °C 0 0 0 0 0 2 8.9 8.1 1.3 0 0 0 20.3 C
Above 18 °C 0 0 0 0.5 6.4 55.4 122.9 110.5 40.5 2.8 0 0 339 C
Above 15 °C 0 0 0 2.4 26.2 121 213 198.4 93.7 13.9 0.2 0 668.7 C
Above 10 °C 0 0 1.4 19.9 113.3 262.3 367.8 352.6 223.6 71.7 11.1 0.9 1424.7 C
Above 5 °C 2.1 1.4 16.7 85.1 254.2 412.3 522.8 507.6 372.2 189.5 60.2 10.4 2434.3 C
Above 0 °C 23.8 21.9 74.4 210.4 408.9 562.3 677.8 662.6 522.2 342.1 169.6 57.4 3733.2 C
Below 0 °C 137 108.1 51.4 2.5 0 0 0 0 0 0 5.6 69.9 374.5 C
Below 5 °C 270.3 228.6 148.7 27.2 0.3 0 0 0 0 2.5 46.2 177.9 901.6 C
Below 10 °C 423.2 368.3 288.4 112 14.4 0.1 0 0 1.5 39.6 147.1 323.5 1,718 C
Below 15 °C 578.2 509.3 442 244.5 82.3 8.8 0.2 0.7 21.6 136.8 286.2 477.5 2,788 C
Below 18 °C 671.2 593.9 535 332.6 155.5 33.2 3.2 5.9 58.3 218.7 376.1 570.5 3553.9 C
Frost-Free
1981 to 2010 Canadian Climate Normals station data (Frost-Free)
Frost-FreeCode
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