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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.

ST JOHN'S A *
NEWFOUNDLAND
Latitude: 47°37'20.000" N Longitude: 52°44'34.000" W Elevation: 140.50 m
Climate ID: 8403506 WMO ID: 71801 TC ID: YYT
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)-4.8 -5.4 -2.5 1.6 6.2 10.9 15.4 15.5 11.8 6.9 2.6 -2.2 4.7 A
Standard Deviation1.7 2.3 1.8 1.3 1.7 1.5 1.6 1.4 1.1 1 1.2 1.6 0.8 A
Daily Maximum (°C)-0.9 -1.5 1.2 5.2 10.7 15.9 20.3 19.9 15.9 10.5 5.9 1.2 8.7 A
Daily Minimum (°C)-8.6 -9.3 -6.2 -2 1.5 5.9 10.5 11.1 7.7 3.3 -0.7 -5.5 0.6 A
Extreme Maximum (°C)15.2 16 18.3 24.1 25.6 29.4 31.5 31 29.5 24.6 19.4 16.1    
Date (yyyy/dd)1979/09 1996/24 1962/31 1986/24 1972/30 1944/29 1983/06 1996/07 2001/10 1987/04 1950/06 1957/12  
Extreme Minimum (°C)-23.3 -23.8 -23.8 -14.8 -6.7 -3.3 -1.1 0.5 -1.1 -5.6 -13.4 -19.7    
Date (yyyy/dd)1957/29 1990/18 1986/10 1978/04 1964/05 1970/01 1976/05 1983/24 1950/23 1946/31 1993/25 1984/27  
Precipitation:
Rainfall (mm)73.7 60.5 76.7 93.7 93.9 100.5 89.4 108.1 130.9 158.9 116.3 88.4 1191 A
Snowfall (cm)79.9 66.5 52.3 25.7 6.1 1.3 0 0 0 2.9 26.3 61.3 322.3 A
Precipitation (mm)150 125.2 130.8 121.8 100.9 101.9 89.4 108.1 130.9 161.9 144 148.8 1513.7 A
Average Snow Depth (cm)14 26 17 4 0 0 0 0 0 0 1 8 6 A
Median Snow Depth (cm)11 25 14 2 0 0 0 0 0 0 0 7 5 A
Snow Depth at Month-end (cm)21 25 9 1 0 0 0 0 0 0 2 12 6 A
Extreme Daily Rainfall (mm)84.6 67.1 67.5 91.7 81.3 75.2 121.2 80.5 99.4 100.8 75.9 85.1    
Date (yyyy/dd)1942/30 1973/22 1994/11 1951/11 1998/17 1945/24 1946/27 1975/23 2001/19 1942/04 1981/26 1953/26  
Extreme Daily Snowfall (cm)38.4 54.9 45.7 68.4 25.4 13.5 0 0 0.3 19.8 25.3 49.3    
Date (yyyy/dd)1966/09 1959/15 1974/11 1999/05 1956/05 1959/10 1942/01 1942/01 1965/30 1965/29 1980/19 1954/29  
Extreme Daily Precipitation (mm)84.6 68.3 72 91.7 83.1 75.2 121.2 80.5 99.4 100.8 76.5 85.1    
Date (yyyy/dd)1942/30 1973/22 2000/18 1951/11 1998/17 1945/24 1946/27 1975/23 2001/19 1942/04 1964/05 1953/26  
Extreme Snow Depth (cm)144 180 133 105 30 3 0 0 0 9 36 64    
Date (yyyy/dd)2001/31 2001/09 1987/14 2001/13 2001/02 1968/10 1955/01 1955/01 1955/01 1991/29 1972/25 1955/27  
Days with Maximum Temperature:
<= 0 °C19 18.2 12.9 3.3 0.07 0 0 0 0 0 2.7 12.7 68.8 A
> 0 °C12 10.1 18.1 26.7 30.9 30 31 31 30 31 27.3 18.3 296.4 A
> 10 °C1.1 0.80 1.5 4.7 16.1 24.7 30.3 30.8 27.7 14.9 6.1 1.5 160.2 A
> 20 °C0 0 0 0.13 1.7 7.9 17.8 15.5 4.4 0.57 0 0 48 A
> 30 °C0 0 0 0 0 0 0.13 0.03 0 0 0 0 0.16 A
> 35 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
Days with Minimum Temperature:
> 0 °C1 1 1.8 6.1 20.2 28.7 30.9 31 29.7 25.3 12.3 3.3 191.3 A
<= 2 °C30.7 27.9 30.5 27.8 19.9 4.8 0.23 0.13 1.5 11.5 23.8 29.9 208.5 A
<= 0 °C30 27.3 29.2 23.9 10.8 1.3 0.07 0 0.27 5.7 17.7 27.7 174 A
< -2 °C27.7 25.3 24.3 14.2 3.2 0.07 0 0 0 1.8 9.9 23.3 129.8 A
< -10 °C12.4 13 7.3 0.47 0 0 0 0 0 0 0.17 5.7 39.1 A
< -20 °C0.10 0.73 0.13 0 0 0 0 0 0 0 0 0 0.96 A
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
Days with Rainfall:
>= 0.2 mm9.7 8.1 11.5 13.4 15.3 14.9 13.3 14.2 16 18.5 15.5 11.8 162.4 A
>= 5 mm4.5 3.2 4.5 5.2 5.8 5.7 5.3 5.7 7.1 7.8 6.7 5.1 66.7 A
>= 10 mm2.8 2.2 2.7 2.8 3.1 3.3 3 3.5 4.4 5.2 3.8 3.1 39.9 A
>= 25 mm0.60 0.53 0.53 0.77 0.60 0.67 0.77 1 1.2 1.7 1.1 0.90 10.4 A
Days With Snowfall:
>= 0.2 cm17.9 15.2 13.4 8.1 2.5 0.30 0 0 0 2.1 8.4 16.3 84.2 A
>= 5 cm5.1 4.7 3.2 1.3 0.47 0.10 0 0 0 0.13 1.5 4.1 20.6 A
>= 10 cm2.3 1.7 1.4 0.57 0.10 0.07 0 0 0 0.07 0.70 1.8 8.7 A
>= 25 cm0.20 0.27 0.23 0.10 0 0 0 0 0 0 0.03 0.10 0.93 A
Days with Precipitation:
>= 0.2 mm21.9 19 20.1 18.1 16.4 14.9 13.3 14.2 16 19.3 20.1 22.4 215.6 A
>= 5 mm9.2 7.5 7.7 6.8 6.3 5.7 5.3 5.7 7.1 7.9 8.2 8.9 86.5 A
>= 10 mm5.4 4.1 4.5 3.7 3.5 3.4 3 3.5 4.4 5.3 4.6 5.2 50.6 A
>= 25 mm1 1 0.93 0.97 0.63 0.67 0.77 1 1.2 1.7 1.2 1.1 12.3 A
Days with Snow Depth:
>= 1 cm26.9 22.9 23.3 11.2 1.1 0 0 0 0 0.27 5.3 18.9 109.7 A
>= 5 cm20.1 19.7 18.5 5.3 0.33 0 0 0 0 0.07 2.2 13 79.1 A
>= 10 cm15.1 16.8 13.7 3.4 0.10 0 0 0 0 0 0.83 9.4 59.5 A
>= 20 cm8.5 10.6 8.4 1.6 0.03 0 0 0 0 0 0.17 5.1 34.3 A
Wind:
Speed (km/h)27.6 26.5 26.1 22.5 21.1 21.2 20.7 19.8 20.7 22.7 24.5 26.6 23.3 A
Most Frequent DirectionW W SW SW SW SW SW SW SW SW W W SW A
Maximum Hourly Speed (km/h)120 137 121 93 101 74 67 84 97 103 105 97    
Date (yyyy/dd)1977/20 1959/16 1956/15 1960/10 1975/02 1976/13 1979/06 1953/06 1955/21 1955/24 1955/27 1954/10  
Maximum Gust Speed (km/h)167 193 193 159 146 108 107 113 153 153 161 153    
Date (yyyy/dd)1977/20 1964/09 1956/15 1960/10 1975/01 1959/11 1977/23 1955/22 1955/21 1955/15 1955/27 1963/20  
Direction of Maximum GustSW SW NW SW N NE SE SW S NW SW S NW  
Days with Winds >= 52 km/h10.3 7.4 7.5 3.7 1.9 1.6 1.1 0.8 2.4 4.3 6.2 9.6 56.7 A
Days with Winds >= 63 km/h5.2 3.2 3.6 1.1 0.4 0.2 0.1 0.1 0.7 1.2 1.9 4.2 22.1 A
Degree Days:
Above 24 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
Above 18 °C0 0 0 0 0 2.2 14 14.4 1.4 0.1 0 0 32.1 A
Above 15 °C0 0 0 0.1 0.8 13.2 53.4 52.4 9.4 0.8 0 0 130.2 A
Above 10 °C0 0.2 0.1 1.5 14.4 68.3 172.2 173.2 72.4 14.1 2.3 0 518.6 A
Above 5 °C1.4 1.1 2.2 10.6 70 180.6 323 326.1 204.3 78.9 21 2.8 1221.8 A
Above 0 °C13.3 12.3 23.5 67.5 191.5 326.7 478 481.1 354 214.7 94.6 26 2283.1 A
Below 0 °C161.2 164.9 101.8 19.7 1 0 0 0 0 0.3 16.2 92.5 557.7 A
Below 5 °C304.3 295.1 235.6 112.9 34.5 4 0 0 0.2 19.5 92.5 224.2 1322.8 A
Below 10 °C457.9 435.5 388.4 253.8 133.9 41.6 4.2 2.1 18.3 109.7 223.8 376.5 2445.8 A
Below 15 °C612.9 576.6 543.4 402.4 275.3 136.5 40.4 36.3 105.4 251.4 371.6 531.5 3883.7 A
Below 18 °C705.9 661.4 636.4 492.2 367.5 215.5 94.1 91.3 187.3 343.7 461.6 624.5 4881.5 A
Humidex:
Extreme Humidex17.2 17.3 17.2 26.1 29.5 34.8 38.5 37.7 35.8 29.8 23.7 18.6    
Date (yyyy/dd)2000/05 1996/24 1968/24 1986/23 1988/26 1957/30 1983/06 1984/18 2001/10 1961/05 1967/04 1957/12  
Days with Humidex >= 300 0 0 0 0 0.7 3.4 3.2 0.4 0 0 0 7.7 A
Days with Humidex >= 350 0 0 0 0 0 0.2 0.3 0 0 0 0 0.5 A
Days with Humidex >= 400 0 0 0 0 0 0 0 0 0 0 0 0 A
Wind Chill:
Extreme Wind Chill-35.7 -40.3 -40.3 -21.4 -14.2 -7.7 -3.4 -2 -4.4 -11.8 -24.6 -34.3    
Date (yyyy/dd)1957/29 1990/03 1986/10 1994/03 1993/11 1959/11 1976/06 1976/27 1989/28 1954/26 1993/25 1984/27  
Days with Wind Chill < -209 9.4 4.3 0.1 0 0 0 0 0 0 0.1 3.6 26.5 A
Days with Wind Chill < -300.5 1.3 0.2 0 0 0 0 0 0 0 0 0.3 2.3 A
Days with Wind Chill < -400 0 0 0 0 0 0 0 0 0 0 0 0.1 A
Humidity:
Average Vapour Pressure (kPa)0.4 0.4 0.5 0.6 0.8 1.1 1.4 1.4 1.2 0.9 0.7 0.5 0.8 A
Average Relative Humidity - 0600LST (%)83.6 83.2 85 87.3 87 86.8 87.3 88.5 88.9 87.3 85.1 84.2 86.2 A
Average Relative Humidity - 1500LST (%)78.9 76.4 75.8 75.9 72.7 71.1 69.9 70.8 73 76.1 78.9 80.7 75 A
Pressure:
Average Station Pressure (kPa)99.2 99.2 99.4 99.5 99.8 99.7 99.8 99.9 99.8 99.8 99.5 99.2 99.6 A
Average Sea Level Pressure (kPa)100.9 101 101.1 101.3 101.5 101.4 101.5 101.5 101.5 101.5 101.2 101 101.3 A
Visibility (hours with):
< 1 km48.9 48.7 85.9 116.9 111 74.5 60.8 47.1 33.7 33.8 52.7 50 764 B
1 to 9 km180.1 160.6 166.3 145.2 139.2 133.2 129.4 131.3 114.7 124 132.2 160.6 1716.6 B
> 9 km515 469.5 491.8 458 493.8 512.3 553.8 565.6 571.6 586.2 535.1 533.4 6286.2 B
Cloud Amount (hours with):
0 to 2 tenths89.7 91.8 114.1 98.6 104.4 95.3 110.4 120.5 125.6 100.7 67.4 69.2 1187.5 B
3 to 7 tenths145.3 124.1 117.8 97.3 112.7 129.8 173.5 165 153.8 146.8 129.6 136.5 1632.2 B
8 to 10 tenths509 462.8 512.1 524.1 527 495 460.2 458.5 440.6 496.5 522.9 538.4 5947 B


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Date Modified: 2013-02-04

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