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Notices:

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Canadian Climate Normals 1971-2000

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.

NOTE!! 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.

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.

Normals from to  
January-June January-December+Year July-December
Temperature:Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
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 A
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 A
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 A
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 A
Extreme Maximum (°C)17 19.5 26 32 31 33 35.5 35 33.9 29.4 25 20    
Date (yyyy/dd)1995/14 2000/26 1998/31 1990/28 1987/30 1988/22 1988/08 1954/03 1953/02 1953/03 1961/03 1982/03  
Extreme Minimum (°C)-25.5 -24.4 -21 -11.7 -3.5 2.8 5 5 1.1 -3.9 -12.2 -26    
Date (yyyy/dd)1994/19 1976/02 1980/01 1954/03 1978/01 1972/11 1961/10 1982/29 1951/29 1952/21 1976/30 1980/25  
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 A
Snowfall (cm)36 28.7 18.3 5.3 0.4 0 0 0 0 0.2 7.2 29.1 125.1 A
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 A
Extreme Daily Rainfall (mm)34.2 32.4 34 33 52 83.2 53.3 63.5 72.3 72 59 43    
Date (yyyy/dd)1998/07 1990/22 1972/01 2000/07 1996/20 1984/17 1998/04 1952/09 1999/29 1995/05 1999/02 1977/13  
Extreme Daily Snowfall (cm)27.9 37 25 25 7 0 0 0 0 6 35.6 26.4    
Date (yyyy/dd)1977/10 1984/28 1998/21 1994/06 1989/06 1950/01 1950/01 1950/01 1950/01 1993/31 1953/26 1977/05  
Extreme Daily Precipitation (mm)41.2 37 40.2 33 52 83.2 53.3 63.5 72.3 72 98 43.2    
Date (yyyy/dd)1979/24 1984/28 1985/04 2000/07 1996/20 1984/17 1998/04 1952/09 1999/29 1995/05 1983/20 1973/13  
Extreme Snow Depth (cm)30 62 50 9 7 0 0 0 0 0 19 39    
Date (yyyy/dd)1996/04 1984/29 1984/01 1992/01 1989/07 1981/01 1981/01 1981/01 1981/01 1981/01 1989/18 1992/12  
Days with Maximum Temperature:
<= 0 °C19.2 16.3 8.7 0.67 0 0 0 0 0 0 3 12.3 60.1 A
> 0 °C11.8 12 22.3 29.3 31 30 31 31 30 31 27 18.7 305.2 A
> 10 °C0.70 1.1 5 16.4 28.7 30 31 31 29.7 22.8 8.6 1.8 206.7 A
> 20 °C0 0 0.41 3.2 11.6 22.3 29.1 27.6 15.4 3.9 0.07 0 113.7 A
> 30 °C0 0 0 0.04 0.14 0.56 2.1 1 0.07 0 0 0 4 A
> 35 °C0 0 0 0 0 0 0.04 0 0 0 0 0 0.04 A
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 C
<= 2 °C30.4 27.2 27.6 15.3 1.9 0 0 0 0.15 5 18.7 28.8 155 C
<= 0 °C28.9 25.7 24 9.3 0.52 0 0 0 0 1.6 14 25.8 129.8 C
< -2 °C25 21.1 17.5 3.8 0.04 0 0 0 0 0.29 7.1 18.6 93.4 C
< -10 °C11.2 9.4 3.4 0 0 0 0 0 0 0 0.21 5 29.2 C
< -20 °C0.78 0.48 0.04 0 0 0 0 0 0 0 0 0.04 1.3 C
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 C
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 A
>= 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 A
>= 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 A
>= 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 A
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 A
>= 5 cm2.9 2.1 1.5 0.37 0.07 0 0 0 0 0.03 0.47 2.4 9.7 A
>= 10 cm1.1 0.87 0.59 0.13 0 0 0 0 0 0 0.20 1.1 4 A
>= 25 cm0.11 0.10 0.03 0.03 0 0 0 0 0 0 0 0.03 0.30 A
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 A
>= 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 A
>= 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 A
>= 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 A
Degree Days:
Above 24 °C0 0 0 0 0.1 1.5 8.3 4.1 0.8 0 0 0 14.8 C
Above 18 °C0 0 0 0.6 13.7 53.9 111 89.5 31.4 1.9 0 0 301.9 C
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 C
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 C
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 C
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 C
Below 0 °C171.7 143.2 63.1 4.3 0 0 0 0 0 0.1 13.3 85.7 481.3 C
Below 5 °C311.2 266.6 167.4 32.7 0.6 0 0 0 0 5.5 73.5 208.7 1066.2 C
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 C
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 C
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 C


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Date Modified: 2013-02-04

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