Canadian Climate Normals 1971-2000 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
RIDGEVILLE *
ONTARIO
Latitude: 43°02'30.000" N Longitude: 79°19'30.000" W Elevation: 236.20 m
Climate ID: 6137161 WMO ID: TC ID:

* This station meets WMO standards for temperature and precipitation.

1971 to 2000 Canadian Climate Normals station data
 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Temperature:
Daily Average (°C)-4.9 -4.1 0.6 6.9 13.6 18.5 21.4 20.6 16.5 10.3 4.3 -1.7 8.5 LegendAA
Standard Deviation2.7 2.7 2.1 1.5 1.8 1.4 1.1 1.1 1.1 1.7 1.6 2.6 1 LegendAA
Daily Maximum (°C)-1.8 -0.8 4.3 11.4 18.5 23.1 25.8 24.7 20.5 14 7.3 1.3 12.4 LegendAA
Daily Minimum (°C)-8.1 -7.4 -3.2 2.4 8.6 13.9 17.1 16.4 12.6 6.6 1.2 -4.6 4.6 LegendAA
Extreme Maximum (°C)17 19.5 26 32 31 33 35.5 35 33.9 29.4 25 20   Legend
Extreme Minimum (°C)-25.5 -24.4 -21 -11.7 -3.5 2.8 5 5 1.1 -3.9 -12.2 -26   Legend
Precipitation:
Rainfall (mm)31.5 30.6 52.4 71.2 79 89.9 73.3 84.4 96.7 78.9 72.7 57.2 817.7 LegendAA
Snowfall (cm)36 28.7 18.3 5.3 0.4 0 0 0 0 0.2 7.2 29.1 125.1 LegendAA
Precipitation (mm)67.5 58.2 70.7 76.4 79.4 89.9 73.3 84.4 96.7 79.1 82.9 86.3 944.6 LegendAA
Extreme Daily Rainfall (mm)34.2 32.4 34 33 52 83.2 53.3 63.5 72.3 72 59 43   Legend
Extreme Daily Snowfall (cm)27.9 37 25 25 7 0 0 0 0 6 35.6 26.4   Legend
Extreme Daily Precipitation (mm)41.2 37 40.2 33 52 83.2 53.3 63.5 72.3 72 98 43.2   Legend
Extreme Snow Depth (cm)30 62 50 9 7 0 0 0 0 0 19 39   Legend
Days with Maximum Temperature:
<= 0 °C19.2 16.3 8.7 0.67 0 0 0 0 0 0 3 12.3 60.1 LegendAA
> 0 °C11.8 12 22.3 29.3 31 30 31 31 30 31 27 18.7 305.2 LegendAA
> 10 °C0.70 1.1 5 16.4 28.7 30 31 31 29.7 22.8 8.6 1.8 206.7 LegendAA
> 20 °C0 0 0.41 3.2 11.6 22.3 29.1 27.6 15.4 3.9 0.07 0 113.7 LegendAA
> 30 °C0 0 0 0.04 0.14 0.56 2.1 1 0.07 0 0 0 4 LegendAA
> 35 °C0 0 0 0 0 0 0.04 0 0 0 0 0 0.04 LegendAA
Days with Minimum Temperature:
> 0 °C2.1 2.6 7 20.7 30.5 30 31 31 30 29.4 16 5.2 235.5 LegendCC
<= 2 °C30.4 27.2 27.6 15.3 1.9 0 0 0 0.15 5 18.7 28.8 155 LegendCC
<= 0 °C28.9 25.7 24 9.3 0.52 0 0 0 0 1.6 14 25.8 129.8 LegendCC
< -2 °C25 21.1 17.5 3.8 0.04 0 0 0 0 0.29 7.1 18.6 93.4 LegendCC
< -10 °C11.2 9.4 3.4 0 0 0 0 0 0 0 0.21 5 29.2 LegendCC
< -20 °C0.78 0.48 0.04 0 0 0 0 0 0 0 0 0.04 1.3 LegendCC
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 LegendCC
Days with Rainfall:
>= 0.2 mm4.7 3.8 6.9 9.7 10.5 10.2 8.4 8.8 9.6 9.8 9.3 6.7 98.5 LegendAA
>= 5 mm2.1 2.1 3.5 4.8 5.7 5.5 4.5 5 5.4 5.2 5.3 3.8 52.9 LegendAA
>= 10 mm1.1 1.2 1.8 2.5 2.9 3 2.7 3.2 3.3 2.7 2.4 2.1 29 LegendAA
>= 25 mm0.14 0.17 0.24 0.48 0.33 0.73 0.68 0.69 0.97 0.43 0.40 0.41 5.7 LegendAA
Days With Snowfall:
>= 0.2 cm6.3 5.3 2.9 1 0.07 0 0 0 0 0.03 1.7 5.6 22.9 LegendAA
>= 5 cm2.9 2.1 1.5 0.37 0.07 0 0 0 0 0.03 0.47 2.4 9.7 LegendAA
>= 10 cm1.1 0.87 0.59 0.13 0 0 0 0 0 0 0.20 1.1 4 LegendAA
>= 25 cm0.11 0.10 0.03 0.03 0 0 0 0 0 0 0 0.03 0.30 LegendAA
Days with Precipitation:
>= 0.2 mm10.5 8.7 9.1 10.5 10.5 10.2 8.4 8.8 9.6 9.8 10.8 11.4 118.4 LegendAA
>= 5 mm5 4.2 4.7 5.1 5.7 5.5 4.5 5 5.4 5.2 5.8 5.9 62.2 LegendAA
>= 10 mm2.3 2.1 2.6 2.7 2.9 3 2.7 3.2 3.3 2.8 2.7 3.2 33.4 LegendAA
>= 25 mm0.25 0.23 0.41 0.52 0.33 0.73 0.68 0.69 0.97 0.43 0.47 0.45 6.2 LegendAA
Degree Days:
Above 24 °C0 0 0 0 0.1 1.5 8.3 4.1 0.8 0 0 0 14.8 LegendCC
Above 18 °C0 0 0 0.6 13.7 53.9 111 89.5 31.4 1.9 0 0 301.9 LegendCC
Above 15 °C0 0 0.2 4.2 38.6 117.9 198.8 173.4 76.2 10.6 0.3 0.1 620.2 LegendCC
Above 10 °C0.2 0 4 25.5 127.2 257.4 353.5 327.1 199.1 61.5 9.9 0.7 1366 LegendCC
Above 5 °C1.9 2.8 20.1 90.2 266 407 508.5 482.1 346.9 170.2 47.1 6.8 2349.4 LegendCC
Above 0 °C17.4 20.8 70.8 211.8 420.3 557 663.5 637.1 496.9 319.8 136.8 38.8 3591 LegendCC
Below 0 °C171.7 143.2 63.1 4.3 0 0 0 0 0 0.1 13.3 85.7 481.3 LegendCC
Below 5 °C311.2 266.6 167.4 32.7 0.6 0 0 0 0 5.5 73.5 208.7 1066.2 LegendCC
Below 10 °C464.4 405.2 306.3 118 16.8 0.4 0 0 2.2 51.7 186.4 357.6 1909.2 LegendCC
Below 15 °C619.2 546.6 457.6 246.7 83.3 10.9 0.4 1.3 29.3 155.9 326.8 512 2989.8 LegendCC
Below 18 °C712.2 631.5 550.3 333.1 151.3 36.9 5.6 10.4 74.5 240.2 416.5 604.9 3767.4 LegendCC
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