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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.

NANAIMO A *
BRITISH COLUMBIA
Latitude: 49°03'16.000" N Longitude: 123°52'12.000" W Elevation: 28.00 m
Climate ID: 1025370 WMO ID: TC ID: YCD

* 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)2.7 4.2 6.1 8.8 12.3 15.2 17.9 18 14.8 9.7 5.4 2.9 9.8 A
Standard Deviation1.6 1.5 1.1 1 1.2 1.1 1.1 1.1 1.2 0.8 1.6 1.7 0.6 A
Daily Maximum (°C)6.2 8.2 10.9 14.1 17.8 20.5 24 24.2 20.9 14.6 9.1 6.1 14.7 A
Daily Minimum (°C)-0.8 0 1.3 3.4 6.7 9.7 11.8 11.7 8.6 4.8 1.5 -0.4 4.9 A
Extreme Maximum (°C)15.6 18.3 21.7 26.1 34.3 34.5 36.1 36.7 33.2 29.3 19.4 17.5    
Date (yyyy/dd)1968/20 1968/27 1994/28 1998/30 1983/29 1987/29 1965/30 1960/09 1988/03 1987/01 1949/02 1980/26  
Extreme Minimum (°C)-17.8 -16.7 -12.2 -5 -4.4 0.6 2.8 3.3 -1.1 -6.7 -16.1 -20    
Date (yyyy/dd)1950/31 1950/03 1951/10 1948/03 1949/16 1954/17 1954/03 1973/18 1947/17 1949/18 1955/14 1968/30  
Precipitation:
Rainfall (mm)141.7 122.5 106.3 62.9 49.9 44.9 25.9 31.6 38.5 97 190.5 166.4 1077.9 A
Snowfall (cm)27.2 16.3 5.6 0.2 0 0 0 0 0 1.1 7.8 22.8 80.9 A
Precipitation (mm)169.5 140.4 112.4 63.1 49.9 44.9 25.9 31.6 38.5 97.8 198.6 190.2 1162.7 A
Average Snow Depth (cm)4 2 0 0 0 0 0 0 0 0 0 2 1 A
Median Snow Depth (cm)3 1 0 0 0 0 0 0 0 0 0 1 0 A
Snow Depth at Month-end (cm)3 2 0 0 0 0 0 0 0 0 1 5 1 A
Extreme Daily Rainfall (mm)70.6 97.3 57.4 58.7 30.8 29.9 23.6 75.6 47.2 91.7 84.1 74.4    
Date (yyyy/dd)1968/18 1991/01 1997/17 1962/27 1984/25 1980/25 1949/23 1991/29 1953/29 1963/21 1955/02 1979/17  
Extreme Daily Snowfall (cm)38.6 73.7 33 4.6 1 0 0 0 0 20 32.9 47.8    
Date (yyyy/dd)1971/13 1975/12 1991/01 1981/12 1996/08 1947/01 1947/07 1947/01 1947/01 1984/31 1984/01 1965/27  
Extreme Daily Precipitation (mm)70.6 97.3 57.4 58.7 30.8 29.9 23.6 75.6 47.2 91.7 84.1 74.4    
Date (yyyy/dd)1968/18 1991/01 1997/17 1962/27 1984/25 1980/25 1949/23 1991/29 1953/29 1963/21 1955/02 1979/17  
Extreme Snow Depth (cm)74 66 33 1 0 0 0 0 0 0 47 74    
Date (yyyy/dd)1966/04 1975/12 1962/05 1981/12 1955/01 1955/01 1955/01 1955/01 1955/01 1955/01 1985/27 1996/30  
Days with Maximum Temperature:
<= 0 °C1.3 0.13 0.03 0 0 0 0 0 0 0 0.38 1.5 3.3 A
> 0 °C29.7 28.1 31 30 31 30 31 31 30 31 29.6 29.5 362 A
> 10 °C3.3 7.6 19.1 27.3 30.9 30 31 31 30 29.1 11.3 2.7 253.2 A
> 20 °C0 0 0.03 1.8 8.2 14.4 25.1 26.2 16.3 1.8 0 0 93.8 A
> 30 °C0 0 0 0 0.17 0.87 3.2 2.8 0.40 0 0 0 7.4 A
> 35 °C0 0 0 0 0 0 0.03 0.07 0 0 0 0 0.10 A
Days with Minimum Temperature:
> 0 °C13.4 14.2 18.8 24.8 30.8 30 31 31 29.9 28.4 19.1 13.6 285 A
<= 2 °C23.9 20 18.9 10.9 1.7 0.10 0 0 0.33 7.5 17 22.9 123.2 A
<= 0 °C17.6 14 12.2 5.2 0.23 0 0 0 0.07 2.6 10.9 17.4 80.2 A
< -2 °C10.3 7.3 4.5 0.80 0 0 0 0 0 0.31 5.2 9.8 38.2 A
< -10 °C0.90 0.37 0.03 0 0 0 0 0 0 0 0.31 0.69 2.3 A
< -20 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 A
Days with Rainfall:
>= 0.2 mm16.8 15.3 17.2 14.2 14.1 12.1 7.9 7.5 9.1 14.5 20 18.5 167.2 A
>= 5 mm8.3 6.9 6.6 4.1 3.3 3.2 1.8 1.9 2.6 5.9 10.5 9.2 64.3 A
>= 10 mm4.9 4.3 3.5 1.7 1.1 1 0.50 0.67 1.1 3.3 6.5 5.8 34.4 A
>= 25 mm1.3 0.80 0.57 0.17 0.07 0.07 0 0.17 0.07 0.79 1.9 1.6 7.5 A
Days With Snowfall:
>= 0.2 cm4.1 2.7 1.1 0.03 0.03 0 0 0 0 0.07 1.1 3.8 12.9 A
>= 5 cm1.8 0.97 0.33 0 0 0 0 0 0 0.07 0.41 1.5 5.1 A
>= 10 cm0.97 0.53 0.20 0 0 0 0 0 0 0.07 0.28 0.93 3 A
>= 25 cm0.20 0.07 0.03 0 0 0 0 0 0 0 0.03 0.14 0.47 A
Days with Precipitation:
>= 0.2 mm19 16.7 17.5 14.2 14.1 12.1 7.9 7.5 9.1 14.6 20.5 20.6 173.7 A
>= 5 mm10.1 7.8 7 4.1 3.3 3.2 1.8 1.9 2.6 5.9 10.9 10.4 69 A
>= 10 mm6 5 3.8 1.7 1.1 1 0.50 0.67 1.1 3.3 6.8 6.6 37.6 A
>= 25 mm1.5 1.1 0.63 0.17 0.07 0.07 0 0.17 0.07 0.79 2 1.9 8.5 A
Days with Snow Depth:
>= 1 cm8.7 3.7 1 0.03 0 0 0 0 0 0 1 4.7 19.1 C
>= 5 cm7 3.2 0.83 0 0 0 0 0 0 0 0.81 3.6 15.4 C
>= 10 cm5.4 2.3 0.52 0 0 0 0 0 0 0 0.56 2.5 11.3 C
>= 20 cm2.4 1.3 0.09 0 0 0 0 0 0 0 0.19 1.4 5.3 C
Wind:
Maximum Hourly Speed (km/h)51 46 48 48 37 39 46 41 41 52 52 48    
Date (yyyy/dd)1955/15 1999/02 1963/28 1996/23 1982/25 1978/18 1994/09 1985/11 1993/11 1995/03 1994/16 1956/09  
Direction of Maximum Hourly SpeedSE W S S N NW N N NW NW W SW W  
Maximum Gust Speed (km/h)82 64 71 56 51 69 48 42 55 72 64 64    
Date (yyyy/dd)1964/19 1964/11 1963/11 1962/06 1963/06 1962/25 1962/16 1964/25 1964/25 1963/21 1961/01 1961/21  
Direction of Maximum GustS W NW N S SW NW SW W S NW W S  
Degree Days:
Above 24 °C0 0 0 0 0 0 0.7 0.6 0 0 0 0 1.3 A
Above 18 °C0 0 0 0 1.4 8.2 31.9 31 4.6 0 0 0 77 A
Above 15 °C0 0 0 0.3 9.9 33.8 94.5 95.2 29.2 0.8 0 0 263.7 A
Above 10 °C0.1 0.3 1.5 18.2 80.2 155 244.6 246.7 144.2 30.3 2.9 0.3 924.2 A
Above 5 °C13.8 21.9 50.1 114.7 225.6 304.6 399.6 401.7 292.8 148.6 43.3 15.3 2032 A
Above 0 °C98.4 122.4 189.5 263.3 380.6 454.6 554.6 556.7 442.8 301.8 164.7 103.1 3632.4 A
Below 0 °C13.6 4.9 0.6 0 0 0 0 0 0 0 4.2 13.2 36.6 A
Below 5 °C84.1 45.8 16.2 1.4 0 0 0 0 0 1.8 32.8 80.5 262.5 A
Below 10 °C225.3 165.6 122.7 54.9 9.5 0.4 0 0 1.4 38.5 142.4 220.4 981.1 A
Below 15 °C380.3 306.6 276.2 187 94.3 29.2 4.8 3.6 36.3 164 289.5 375.2 2146.9 A
Below 18 °C473.3 391.4 369.2 276.7 178.7 93.6 35.3 32.3 101.8 256.2 379.5 468.2 3056 A
Bright Sunshine:
Total Hours56.5 79.5 131.8 176.1 226.2 222.6 291 269.3 203.1 131.6 65.7 50 1903.4 A
Days with measureable17.9 19.7 25.3 26.9 29 28 29.8 29.6 28.1 24.6 19.2 16.4 294.4 A
% of possible daylight hours20.9 27.8 35.8 42.9 47.8 46 59.6 60.4 53.6 39.2 23.8 19.4 39.8 A
Extreme Daily8.4 10.1 10.8 13.7 14.6 15.2 14.8 14.4 12.8 11 8.7 8   A
Date (yyyy/dd)1996/31 1995/28 1975/31 1989/29 1985/15 1998/29 1975/01 1996/22 1988/01 1994/03 1995/01 1988/16  
Humidex:
Extreme Humidex16 17.8 21.3 26.2 37 36.4 40.5 42.9 35.7 29.5 20.2 20.1    
Date (yyyy/dd)1968/20 1968/27 1994/28 1987/27 1983/29 1969/17 1998/27 1974/29 1988/03 1987/01 1975/03 1980/26  
Wind Chill:
Extreme Wind Chill-22.4 -18.4 -14.1 -6.7 -6.7 -0.7 2.5 2.7 -2.7 -6.7 -22 -21.2    
Date (yyyy/dd)1969/25 1989/01 1955/05 1954/14 1954/01 1976/01 1954/03 1960/31 1961/29 1956/28 1955/14 1964/16  
Humidity:
Average Relative Humidity - 0600LST (%)93 91.7 90.9 88.6 83 80.9 81.1 84.8 89 91.3 92.6 92.5 88.3 A
Average Relative Humidity - 1500LST (%)81.5 73.3 65 58.8 57.8 58.4 53.2 53.1 56.9 68.1 79 83.8 65.7 A


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Date Modified: 2013-02-04

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