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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.

LYTTON
BRITISH COLUMBIA
Latitude: 50°14'00.000" N Longitude: 121°35'00.000" W Elevation: 229.00 m
Climate ID: 1114741 WMO ID: TC ID:
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)-2.4 1.2 5.7 10.1 14.3 18.1 21.4 21.4 16.2 10 2.8 -1.8 9.7 C
Standard Deviation3.4 2.9 1.5 1.3 1 1.6 1.5 1.7 1.7 1.1 3 3.3 0.8 C
Daily Maximum (°C)0.6 4.9 10.7 16.1 20.4 24.1 28.1 28.1 22.5 14.9 5.8 1.2 14.8 C
Daily Minimum (°C)-5.5 -2.6 0.7 4 8.2 12.1 14.6 14.6 9.9 5.1 -0.3 -4.7 4.7 C
Extreme Maximum (°C)15 16.4 23.7 33.1 40.4 39.1 42.2 41.5 38.7 29.9 20 17.8    
Date (yyyy/dd)1971/30 1986/28 1991/31 1977/24 1983/29 1987/29 1971/31 1981/09 1988/03 1980/06 1975/04 1976/15  
Extreme Minimum (°C)-23.7 -22.5 -20 -4.4 0.8 4.4 6.1 7.4 -2.2 -18.1 -27.7 -27.1    
Date (yyyy/dd)1982/06 1989/01 1976/03 1975/06 1978/06 1976/04 1971/06 1980/29 1972/27 1984/31 1985/27 1984/31  
Precipitation:
Rainfall (mm)35.1 28 26.4 18.8 18.2 18.8 14.4 22.9 27.3 36.4 49.1 43.3 338.7 C
Snowfall (cm)39 22.7 6.8 0.6 0 0 0 0 0 0.9 18.2 29.3 117.4 C
Precipitation (mm)64.1 45.2 32.7 19.3 18.2 18.8 14.4 22.9 27.3 37.2 65.4 67 432.4 C
Average Snow Depth (cm)8 3 1 0 0 0 0 0 0 0 2 4 1 C
Median Snow Depth (cm)7 2 0 0 0 0 0 0 0 0 1 3 1 C
Snow Depth at Month-end (cm)4 5 0 0 0 0 0 0 0 0 3 5 1 C
Extreme Daily Rainfall (mm)60.5 38.4 26.1 29.4 20.1 31.2 34.3 22.4 27.9 46 43.2 36.6    
Date (yyyy/dd)1974/15 1991/01 1989/09 1991/03 1980/15 1980/04 1971/06 1991/29 1972/21 1982/22 1990/12 1982/03  
Extreme Daily Snowfall (cm)55.1 39.1 21.6 3 0 0 0 0 0 6.8 38.8 34.3    
Date (yyyy/dd)1971/15 1972/28 1991/02 1972/08 1970/01 1970/01 1970/01 1970/01 1970/01 1984/30 1980/29 1971/22  
Extreme Daily Precipitation (mm)60.5 38.4 32 29.4 20.1 31.2 34.3 22.4 27.9 46 43.2 37.4    
Date (yyyy/dd)1974/15 1991/01 1972/05 1991/03 1980/15 1980/04 1971/06 1991/29 1972/21 1982/22 1990/12 1982/16  
Extreme Snow Depth (cm)71 48 51 0 0 0 0 0 0 3 41 64    
Date (yyyy/dd)1971/17 1972/29 1972/01 1970/12 1970/01 1970/01 1970/01 1970/01 1970/01 1984/31 1973/21 1971/24  
Days with Maximum Temperature:
<= 0 °C12.2 5 0.62 0 0 0 0 0 0.05 0.05 3.7 12.1 33.7 C
> 0 °C18.8 23.2 30.4 30 31 30 31 31 30 31 26.4 18.9 331.6 C
> 10 °C1.2 4.5 18 27 30.8 30 31 31 29.8 26.7 5.8 1.4 237 C
> 20 °C0 0 0.38 6.9 14.1 21.4 28.7 28.2 19 4.6 0 0 123.1 C
> 30 °C0 0 0 0.14 1.3 4.4 12.1 12.3 2.9 0 0 0 33.2 C
> 35 °C0 0 0 0 0.19 0.81 3.7 3.5 0.20 0 0 0 8.4 C
Days with Minimum Temperature:
> 0 °C6.5 9.8 18 26.8 31 30 31 31 29.9 27.3 15.4 8.2 264.7 C
<= 2 °C27.8 22.5 19.2 8.5 0.33 0 0 0 0.70 7.5 19.3 27.3 133.1 C
<= 0 °C24.5 18.5 13 3.2 0 0 0 0 0.15 3.7 14.7 22.9 100.6 C
< -2 °C19.8 12.6 6.3 0.95 0 0 0 0 0.05 1.1 9.3 18.9 68.9 C
< -10 °C7.4 3.3 0.52 0 0 0 0 0 0 0.10 1.6 5.3 18.2 C
< -20 °C0.70 0.24 0 0 0 0 0 0 0 0 0.20 0.95 2.1 C
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 C
Days with Rainfall:
>= 0.2 mm6 7.9 8.8 6.8 7.4 7 5.1 6.4 7.3 9.5 10.4 7.3 89.7 C
>= 5 mm1.8 1.8 1.5 1.1 0.95 1.2 0.86 1.4 1.8 2.5 2.9 2.6 20.4 C
>= 10 mm1 0.71 0.67 0.33 0.24 0.38 0.14 0.57 0.75 0.95 1.3 1.4 8.4 C
>= 25 mm0.30 0.14 0.19 0.05 0 0.05 0.05 0.05 0.05 0.05 0.25 0.30 1.5 C
Days With Snowfall:
>= 0.2 cm7.5 4.7 2.6 0.33 0 0 0 0 0 0.40 4 8.3 27.7 C
>= 5 cm2.3 1.2 0.38 0 0 0 0 0 0 0.10 0.90 1.7 6.6 C
>= 10 cm1.3 0.71 0.14 0 0 0 0 0 0 0 0.60 0.65 3.4 C
>= 25 cm0.15 0.19 0 0 0 0 0 0 0 0 0.15 0.10 0.59 C
Days with Precipitation:
>= 0.2 mm11.7 11.1 9.8 6.9 7.4 7 5.1 6.4 7.3 9.7 12.7 13.4 108.3 C
>= 5 mm3.8 2.8 2.1 1.1 0.95 1.2 0.86 1.4 1.8 2.5 3.9 3.9 26.2 C
>= 10 mm1.7 1.3 0.81 0.33 0.24 0.38 0.14 0.57 0.75 0.95 1.8 2 11 C
>= 25 mm0.45 0.19 0.19 0.05 0 0.05 0.05 0.05 0.05 0.05 0.35 0.55 2 C
Days with Snow Depth:
>= 1 cm14.6 8.5 2 0 0 0 0 0 0 0.15 3.5 12.7 41.4 D
>= 5 cm10.5 5.5 1.6 0 0 0 0 0 0 0 2.3 8 27.9 D
>= 10 cm8.4 3.6 1.4 0 0 0 0 0 0 0 1.9 5.4 20.6 D
>= 20 cm5.1 1.2 0.67 0 0 0 0 0 0 0 1.3 1.8 10.1 D
Wind:
Maximum Hourly Speed (km/h)63 63 56 59 74 80 81 69 56 59 65 65    
Date (yyyy/dd)1989/30 1976/08 1977/05 1990/19 1991/20 1979/29 1991/24 1991/26 1989/26 1989/18 1990/12 1977/11  
Direction of Maximum Hourly SpeedS S S S S S S S S S S S S  
Maximum Gust Speed (km/h)97 72 89 74 74 79 77 92 87 85 87 84    
Date (yyyy/dd)1971/07 1970/02 1970/07 1970/03 1972/10 1970/27 1970/16 1970/25 1970/02 1970/17 1971/21 1972/19  
Direction of Maximum GustS S S S S S S S S S S S S  
Degree Days:
Above 24 °C0 0 0 0 0.3 2.4 17 16.3 0.6 0 0 0 36.6 C
Above 18 °C0 0 0 0.3 8.9 46.1 115.6 114.7 23 0.6 0 0 309.1 C
Above 15 °C0 0 0 3 31.7 103.2 198.8 197.9 66.4 5.2 0.2 0 606.2 C
Above 10 °C0.2 0 2.5 41.1 136.9 243 352.2 352.1 189.5 46.5 3.5 0.3 1367.7 C
Above 5 °C6.1 12 51.8 152.7 289.3 393 507.2 507.1 337.4 160.5 28.9 6 2452 C
Above 0 °C45.8 82.8 184 301.6 444.3 543 662.2 662.1 487.1 311.1 114.4 49.8 3888.2 C
Below 0 °C121.2 49.3 6.2 0 0 0 0 0 0 1.2 31.3 104.6 313.7 C
Below 5 °C236.5 119.7 29 1.1 0 0 0 0 0.3 5.6 95.8 215.8 703.8 C
Below 10 °C385.5 249 134.6 39.5 2.6 0 0 0 2.4 46.6 220.4 365.1 1445.7 C
Below 15 °C540.3 390.2 287.2 151.3 52.4 10.3 1.6 0.7 29.3 160.2 367.1 519.8 2510.3 C
Below 18 °C633.3 474.9 380.2 238.6 122.6 43.1 11.4 10.6 75.9 248.7 456.9 612.8 3308.9 C
Bright Sunshine:
Total Hours58.7 83.1 143.7 196 238.2 255 280.3 240.7 183.6 129 60.4 46.6 1915.3 C
Days with measureable21 22.8 28.6 28.9 30.2 29.4 30.6 30.7 29 28.4 21.1 19.4 319.9 C
% of possible daylight hours22.1 29.3 39.1 47.5 49.8 52.1 56.8 53.6 48.3 38.6 22.2 18.5 39.8 C
Extreme Daily5.6 7.8 9.2 10.7 12.4 12.8 12.8 11.3 9.8 7.7 6 4.8   C
Date (yyyy/dd)1983/31 1989/26 1974/31 1977/30 1972/30 1974/19 1975/01 1973/01 1988/01 1972/01 1978/01 1971/06  
Humidex:
Extreme Humidex14.4 15.8 22.9 32.5 39.9 41.1 46.3 41.6 38.7 29.4 20.4 17.8    
Date (yyyy/dd)1971/30 1988/27 1991/31 1977/24 1983/29 1977/17 1990/10 1972/07 1988/03 1980/06 1975/04 1976/15  
Wind Chill:
Extreme Wind Chill-35.6 -32.9 -26.1 -4.9 -2 3 5.3 6.7 -3.6 -25 -41.4 -36.6    
Date (yyyy/dd)1972/27 1989/01 1976/03 1982/19 1970/10 1981/13 1971/06 1975/23 1972/27 1984/31 1985/27 1984/31  
Humidity:
Average Relative Humidity - 0600LST (%)81.5 81 81 77.4 74.1 69.3 68.7 71.6 79.6 82.1 83.8 82.9 77.8 C
Average Relative Humidity - 1500LST (%)70.9 62.9 49.4 38.7 37.2 35.9 32.4 33.4 41.5 54.2 70.7 74.6 50.2 C


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Date Modified: 2013-02-04

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