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
HALIFAX CITADEL
NOVA SCOTIA
Latitude: 44°39'00.000" N Longitude: 63°35'00.000" W Elevation: 70.10 m
Climate ID: 8202220 WMO ID: TC ID:
Temperature
1981 to 2010 Canadian Climate Normals station data
Temperature
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Daily Average (°C) -4.1 -3.6 -0.2 4.9 10.1 15.2 18.8 19.1 15.5 9.9 4.8 -0.8 7.5 C
Standard Deviation 1.9 1.8 1.4 0.9 1.1 1.1 1.0 0.9 1.2 1.2 1.2 2.2 2.1 C
Daily Maximum (°C) -0.1 0.4 3.6 8.7 14.4 19.6 23.1 23.1 19.3 13.4 8.1 2.8 11.4 C
Daily Minimum (°C) -8.2 -7.5 -3.9 1.0 5.8 10.7 14.4 15.1 11.8 6.4 1.5 -4.3 3.6 C
Extreme Maximum (°C) 14.0 16.0 23.5 26.1 33.3 34.0 33.0 33.9 32.2 24.0 20.0 16.7
Date
(yyyy/dd)
1995/ 16 1994/ 20 1998/ 31 1938/ 28 1977/ 23 2001/ 27 2001/ 25 1935/ 19 1969/ 01 1983/ 04 1938/ 06 1950/ 30
Extreme Minimum (°C) -26.1 -25.0 -21.0 -12.0 -2.8 1.7 7.2 6.1 1.0 -5.0 -13.9 -23.3
Date
(yyyy/dd)
1951/ 31 1993/ 07 1989/ 07 1995/ 06 1966/ 08 1973/ 18 1970/ 02 1965/ 30 1980/ 29 1976/ 29 1936/ 19 1933/ 30
Precipitation
1981 to 2010 Canadian Climate Normals station data
Precipitation
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Rainfall (mm) 96.7 75.1 101.3 111.3 118.4 111.8 110.3 96.4 108.9 124.1 143.6 115.9 1313.9 C
Snowfall (cm) 43 35 31 7 1 0 0 0 0 0 8 29 154 C
Precipitation (mm) 139.7 110.1 132.5 118.3 119.1 111.8 110.3 96.4 108.9 124.3 151.4 145.1 1468.1 C
Extreme Daily Rainfall (mm) 88.6 59.2 82.6 73.2 72.1 65.8 93.8 118.1 96.3 81.3 99.1 95.3
Date
(yyyy/dd)
1978/ 18 1965/ 25 1972/ 23 1984/ 16 1971/ 17 1972/ 10 1982/ 20 1971/ 15 1936/ 19 1970/ 04 1972/ 09 1975/ 10
Extreme Daily Snowfall (cm) 39 41 31 23 20 0 0 0 0 13 22 44
Date
(yyyy/dd)
1981/ 17 1992/ 01 1993/ 13 1972/ 03 1972/ 09 1934/ 01 1934/ 01 1933/ 01 1933/ 01 1974/ 20 1989/ 23 1983/ 24
Extreme Daily Precipitation (mm) 93.7 59.2 82.6 73.2 72.1 65.8 93.8 118.1 96.3 81.3 99.1 95.3
Date
(yyyy/dd)
1978/ 18 1965/ 25 1972/ 23 1984/ 16 1971/ 17 1972/ 10 1982/ 20 1971/ 15 1936/ 19 1970/ 04 1972/ 09 1975/ 10
Extreme Snow Depth (cm) 62 66 89 20 0 0 0 0 0 0 29 31
Date
(yyyy/dd)
1981/ 18 1987/ 11 1987/ 17 1985/ 02 1964/ 01 1964/ 01 1964/ 01 1964/ 01 1964/ 01 1964/ 01 1989/ 27 1988/ 18
Days with Maximum Temperature
1981 to 2010 Canadian Climate Normals station data
Days with Maximum Temperature
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
<= 0 °C 15.1 13.6 7.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 1.6 9.5 47.0 C
> 0 °C 15.9 14.7 24.0 29.7 31.0 30.0 31.0 31.0 30.0 31.0 28.4 21.6 318.2 C
> 10 °C 0.7 0.7 2.1 10.6 25.3 29.7 31.0 31.0 29.8 24.3 10.6 2.7 198.4 C
> 20 °C 0.0 0.0 0.1 0.1 3.1 13.4 24.6 25.2 11.1 0.7 0.0 0.0 78.2 C
> 30 °C 0.0 0.0 0.0 0.0 0.1 0.2 0.3 0.3 0.1 0.0 0.0 0.0 1.0 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 2.6 2.5 5.3 17.8 30.2 30.0 31.0 31.0 30.0 30.0 17.6 6.4 234.3 C
<= 2 °C 30.3 27.5 29.1 21.1 3.4 0.0 0.0 0.0 0.1 4.7 17.8 27.8 161.6 C
<= 0 °C 28.4 25.8 25.7 12.2 0.9 0.0 0.0 0.0 0.0 1.1 12.4 24.6 131.0 C
< -2 °C 24.9 22.1 17.3 3.0 0.0 0.0 0.0 0.0 0.0 0.1 5.8 18.3 91.3 C
< -10 °C 11.5 9.4 3.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 5.1 29.8 C
< -20 °C 0.6 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.8 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 8.5 6.5 10.2 14.1 15.7 13.6 12.1 11.1 11.7 14.1 14.5 10.8 142.7 C
>= 5 mm 5 3.7 5.6 6.1 6.6 6 4.6 5 5.8 5.9 7.3 6 67.3 C
>= 10 mm 3.8 2.6 3.5 3.4 4.5 3.5 3.5 3.4 3.4 4.1 4.4 4.1 44 C
>= 25 mm 1.1 1 1.2 1.1 0.90 1.4 1.5 0.95 1.3 1.4 1.6 1.2 14.6 C
Days With Snowfall
1981 to 2010 Canadian Climate Normals station data
Days With Snowfall
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
>= 0.2 cm 6.8 6.1 4.1 1.6 0.19 0 0 0 0 0.10 1.2 5.2 25.3 C
>= 5 cm 3 2.4 2.7 0.62 0.05 0 0 0 0 0 0.43 2.1 11.3 C
>= 10 cm 1.3 1.1 1.2 0.05 0 0 0 0 0 0 0.29 0.71 4.8 C
>= 25 cm 0.18 0.14 0.10 0 0 0 0 0 0 0 0 0.19 0.61 C
Days with Precipitation
1981 to 2010 Canadian Climate Normals station data
Days with Precipitation
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
>= 0.2 mm 13.8 11.6 13.1 15.2 15.8 13.6 12.1 11.1 11.7 14.1 15.3 14.5 161.8 C
>= 5 mm 7.6 5.8 7.9 6.8 6.7 6.0 4.6 5.0 5.8 5.9 7.7 7.7 77.2 C
>= 10 mm 5.2 3.9 4.9 3.5 4.5 3.5 3.5 3.4 3.4 4.1 4.7 4.9 49.4 C
>= 25 mm 1.5 1.3 1.2 1.1 0.9 1.4 1.5 1.0 1.3 1.4 1.7 1.5 15.7 C
Wind
1981 to 2010 Canadian Climate Normals station data
Wind
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Maximum Hourly Speed (km/h) 135 58 91 56 59 60 70 72 56 56 58 58
Date
(yyyy/dd)
1980/ 19 1971/ 09 1976/ 17 1977/ 05 1975/ 06 1973/ 17 1975/ 28 1979/ 07 1985/ 28 1974/ 20 1973/ 02 1971/ 25
Direction of Maximum Hourly Speed N SW SW S CALM W SE NW SW CALM SW S
Date
(yyyy/dd)
1980/ 19 1971/ 09 1976/ 17 1977/ 05 1973/ 17 1975/ 28 1979/ 07 1985/ 28 1973/ 02 1971/ 25
Degree Days
1981 to 2010 Canadian Climate Normals station data
Degree Days
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Above 24 °C 0 0 0 0 0 0.1 0.2 0.4 0 0 0 0 0.8 D
Above 18 °C 0 0 0 0 0.6 10.9 43.1 49.6 11.1 0.3 0 0 115.6 D
Above 15 °C 0 0 0 0 3.3 42.1 118.9 128.3 45.5 3.9 0.1 0 342 D
Above 10 °C 0.1 0 0.5 2.3 42.6 157.4 271.7 281.8 167.6 43.3 6.1 0.1 973.5 D
Above 5 °C 1.7 1.4 5.9 37.4 161 305.8 426.7 436.8 316.2 154.2 47 7.7 1901.8 D
Above 0 °C 20.2 19.1 50.9 148.6 314.4 455.8 581.7 591.8 466.2 306.9 151.7 48.1 3155.3 D
Below 0 °C 145.2 120 56.3 2.5 0 0 0 0 0 0 7.6 74.9 406.5 D
Below 5 °C 281.7 243.5 166.4 41.2 1.6 0 0 0 0 2.3 53 189.6 979.2 D
Below 10 °C 435.1 383.3 315.9 156.2 38.1 1.6 0 0 1.4 46.4 162 337 1,877 D
Below 15 °C 590 524.5 470.5 303.8 153.8 36.4 2.2 1.5 29.3 162 306 491.9 3071.8 D
Below 18 °C 683 609.2 563.5 393.8 244.2 95.1 19.4 15.8 84.9 251.4 395.9 584.9 3,941 D
Radiation
1981 to 2010 Canadian Climate Normals station data
Radiation
  JanFebMarAprMayJunJulAugSepOctNovDecYear Code
Extreme Global - RF1 (MJ/m2) 11.1 16.3 24.6 28.3 34.1 33.9 33.2 30.7 25.5 18.4 12.8 9
Date
(yyyy/dd)
2001/ 29 1965/ 28 1965/ 31 1965/ 25 2000/ 30 1965/ 20 2000/ 06 1965/ 01 2000/ 06 1973/ 01 1964/ 01 1990/ 03
Frost-Free
1981 to 2010 Canadian Climate Normals station data (Frost-Free)
Frost-FreeCode
Average Date of Last Spring Frost May 01 LegendCC
Average Date of First Fall Frost October 31 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 19May 09May 08May 01Apr 27Apr 25Apr 19
Probability of first temperature in fall of 0 °C or lower on or after indicated dates 10% 25% 33% 50% 66% 75% 90%
DateOct 11Oct 19Oct 20Oct 25Oct 30Nov 01Nov 05
Probability of frost-free period equal to or less than indicated period (Days) 10% 25% 33% 50% 66% 75% 90%
Days152166169176181186194
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