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
AMHERSTBURG
ONTARIO
Latitude: 42°06'12.090" N Longitude: 83°05'40.068" W Elevation: 182.00 m
Climate ID: 6130257 WMO ID: TC ID:
1981 to 2010 Canadian Climate Normals station data
 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Temperature:
Daily Average (°C)-3 -1.8 2.3 8.9 15 20.8 23.2 22.3 18.1 11.3 5.1 -1 10.1 Legend DD
Standard Deviation2.9 2.1 1.7 1.3 2.1 1.2 1.2 1.4 1.4 1.2 1.9 2.7 1.1 Legend DD
Daily Maximum (°C)0.5 2.1 7.1 14.2 20.5 26.1 28.5 27.4 23.3 15.9 8.7 2.3 14.7 Legend DD
Daily Minimum (°C)-6.5 -5.7 -2.4 3.5 9.4 15.4 17.9 17.3 12.9 6.6 1.3 -4.2 5.5 Legend DD
Extreme Maximum (°C)15 19 24.5 30 33 36 38 37 34 28.5 23 18   Legend
Date
(yyyy/dd)
1995/ 14 2000/ 26 1989/ 27 1990/ 25 1991/ 16 2005/ 25 1995/ 14 1988/ 17 2002/ 10 2002/ 01 1999/ 09 1998/ 03  
Extreme Minimum (°C)-28 -22.5 -20.5 -8 -2 5 8 8 1 -5 -10.5 -22.5   Legend
Date
(yyyy/dd)
1994/ 19 1994/ 10 2003/ 03 1995/ 05 2002/ 19 1993/ 01 2001/ 02 1994/ 06 1993/ 30 1988/ 31 2005/ 25 1989/ 22  
Precipitation:
Rainfall (mm)40 38.1 46.7 86.1 96.8 79.6 81.2 81.9 85.6 73.8 68.1 44.9 822.7 Legend DD
Snowfall (cm)26.2 16.7 15.9 3.3 0 0 0 0 0 0.4 3 17.8 83.3 Legend DD
Precipitation (mm)66.2 54.9 62.5 89.4 96.8 79.6 81.2 81.9 85.6 74.2 71.1 62.7 906 Legend DD
Extreme Daily Rainfall (mm)47.2 51.2 43.8 60.2 66.6 56.4 88.6 56.6 116.8 53.2 48.4 41.6   Legend
Date
(yyyy/dd)
1994/ 27 1990/ 22 1998/ 08 2000/ 20 2002/ 29 1994/ 13 1989/ 19 1995/ 17 1990/ 06 1991/ 25 2006/ 30 1990/ 29  
Extreme Daily Snowfall (cm)28 28 25 11 0 0 0 0 0 5 8 20   Legend
Date
(yyyy/dd)
1999/ 02 2003/ 22 1993/ 04 2005/ 24 1989/ 01 1989/ 01 1988/ 01 1988/ 01 1988/ 01 1989/ 19 2005/ 23 2004/ 22  
Extreme Daily Precipitation (mm)47.2 53 43.8 60.2 66.6 56.4 88.6 56.6 116.8 53.2 48.4 41.6   Legend
Date
(yyyy/dd)
1994/ 27 1990/ 22 1998/ 08 2000/ 20 2002/ 29 1994/ 13 1989/ 19 1995/ 17 1990/ 06 1991/ 25 2006/ 30 1990/ 29  
Extreme Snow Depth (cm)42 28 20 7 0 0 0 0 0 2 8 22   Legend
Date
(yyyy/dd)
1999/ 13 2003/ 23 1999/ 07 2003/ 08 1991/ 31 1991/ 01 1991/ 31 1991/ 01 1991/ 30 1989/ 19 1996/ 26 2005/ 16  
Days with Maximum Temperature:
<= 0 °C14.6 10.5 3.6 0.06 0 0 0 0 0 0 1.1 10.4 40.2 Legend DD
> 0 °C16.4 17.7 27.4 29.9 31 30 31 31 30 31 28.9 20.6 325 Legend DD
> 10 °C1.5 1.8 8.7 22.4 30.4 30 31 31 29.9 26.5 11.2 2.2 226.5 Legend DD
> 20 °C0 0 1.1 5.2 14.5 27 30.7 30.2 22 6.5 0.39 0 137.6 Legend DD
> 30 °C0 0 0 0 1.3 5.8 8.6 5.1 1.3 0 0 0 22.1 Legend DD
> 35 °C0 0 0 0 0 0.12 0.65 0.25 0 0 0 0 1 Legend DD
Days with Minimum Temperature:
> 0 °C4.2 3.3 8.4 22.4 30.6 30 31 31 30 28.5 17.7 6.3 243.3 Legend DD
<= 2 °C29.9 27.5 26.4 13.4 1.7 0 0 0 0.17 5.6 17.5 28.3 150.5 Legend DD
<= 0 °C26.8 24.9 22.6 7.7 0.38 0 0 0 0 2.5 12.4 24.7 122 Legend DD
< -2 °C22 19.7 15.3 2.7 0 0 0 0 0 0.26 6.1 17.3 83.2 Legend DD
< -10 °C8.1 6.2 2.1 0 0 0 0 0 0 0 0.06 5 21.3 Legend DD
< -20 °C0.39 0.18 0.06 0 0 0 0 0 0 0 0 0.11 0.74 Legend DD
< - 30 °C0 0 0 0 0 0 0 0 0 0 0 0 0 Legend DD
Days with Rainfall:
>= 0.2 mm6.6 5.5 8.8 12.8 12.8 10.1 10.5 10 9.2 10.4 10.7 7.8 115.1 Legend DD
>= 5 mm2.5 2.2 3.3 5.4 5.7 4.8 5 4.4 4.7 4.2 4.3 2.9 49.2 Legend DD
>= 10 mm1.2 1.2 1.4 2.9 3.2 2.7 2.8 2.7 2.8 2.5 2.4 1.7 27.6 Legend DD
>= 25 mm0.28 0.22 0.17 0.44 0.78 0.71 0.63 0.89 0.68 0.53 0.39 0.11 5.8 Legend DD
Days With Snowfall:
>= 0.2 cm6.6 4.6 4.1 1.6 0 0 0 0 0 0.16 1.4 5.8 24.3 Legend DD
>= 5 cm1.9 0.89 0.94 0.22 0 0 0 0 0 0.05 0.21 1.3 5.5 Legend DD
>= 10 cm0.50 0.56 0.39 0.06 0 0 0 0 0 0 0 0.32 1.8 Legend DD
>= 25 cm0.11 0.06 0.06 0 0 0 0 0 0 0 0 0 0.23 Legend DD
Days with Precipitation:
>= 0.2 mm12 9.1 11.7 13.6 12.8 10.1 10.5 10 9.2 10.4 11.8 12.4 133.5 Legend DD
>= 5 mm4.6 3 4.4 5.6 5.7 4.8 5 4.4 4.7 4.3 4.5 4.2 55 Legend DD
>= 10 mm1.8 1.8 1.8 3.1 3.2 2.7 2.8 2.7 2.8 2.5 2.4 2.1 29.8 Legend DD
>= 25 mm0.44 0.28 0.28 0.44 0.78 0.71 0.63 0.89 0.68 0.53 0.39 0.16 6.2 Legend DD
Degree Days:
Above 24 °C0 0 0 0 1.5 12.5 25 16.4 2.4 0 0 0 57.8 Legend DD
Above 18 °C0 0 0 3.5 23.4 99.5 158.3 130.6 52.8 5.4 0 0 473.4 Legend DD
Above 15 °C0 0 1 11.9 53.8 175.4 250.7 220.9 111.5 17.9 0.2 0 843.3 Legend DD
Above 10 °C0.1 0.2 8 46 155.6 321.3 405.7 375.9 245.5 77.9 12 1.2 1649.4 Legend DD
Above 5 °C4.1 3.8 34.9 134.1 303.2 471.3 560.7 530.9 394.2 197.7 58.1 8.1 2701.1 Legend DD
Above 0 °C30 32.6 109.2 268.7 458.2 621.3 715.7 685.9 544.2 349.4 163.2 49.9 4028.3 Legend DD
Below 0 °C123.7 87 32.1 1 0 0 0 0 0 0 6.6 79.6 330 Legend DD
Below 5 °C252.8 199.4 112.8 16.4 0 0 0 0 0 3.3 51.5 192.8 829 Legend DD
Below 10 °C403.8 336.9 240.8 78.4 7.4 0 0 0 1.3 38.5 155.4 341 1603.5 Legend DD
Below 15 °C558.7 477.9 388.9 194.2 60.5 4.1 0 0 17.4 133.5 293.6 494.7 2623.6 Legend DD
Below 18 °C651.7 562.7 480.9 275.9 123.1 18.3 0.6 2.7 48.6 214 383.4 587.7 3349.4 Legend DD
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