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SARNIA, ONTARIO


Home > North America > Canada > Ontario
Elevation: 594 feet     Latitude: 43 00N     Longitude: 082 18W

WEATHER
 
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MONTHLY - ALL WEATHER AVERAGES   [ Show Summary ]
[ °C ]   °F
TEMPERATURE 
Average Temperature
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F4723.425.433.244.454.864.87068.161.550.139.828.7

Average High Temperature
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F55.329.832.340.853.564.974.879.577.47158.546.534.7

Average Low Temperature
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F38.717.218.525.535.144.754.860.458.751.941.633.122.8

Highest Recorded Temperature
Years on Record: 39  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F102.45966.978.188.291.2102.499.1100.293.984.973.964.4

Lowest Recorded Temperature
Years on Record: 39  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F-20-20-16.4-14.11426.6304334.229.1169-10.5

Average Number of Days Above 95F/35C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days0.6---------------0.20.30.1------------

Average Number of Days Above 90F/32C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days14.1------------0.93.45.830.9---------

Average Number of Days Above 86F/30C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days14.6------------0.83.962.91---------

Average Number of Days Above 70F/21C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days120.8------0.84.511.922.329.128.518.35.10.2---

Average Number of Days Above 50F/10C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2110.91.25.816.227.9303131302510.12

Average Number of Days Above 32F/0C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days314.213.814.823.929.531303131303128.419.9

Average Number of Days Below 35F/2C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days162.130.127.527.817.23.3---------0.27.219.629.2

Average Number of Days Below 32F/0C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days132.72825.224.810.80.6---------0.12.814.525.7

Average Number of Days Below 28F/-2C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days99.22522.118.45---------------0.78.419.5

Average Number of Days Below 10F/-12C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days30.411.58.93.6---------------------0.26.3

Average Number of Days Below 0F/-17C
Years on Record: 12  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2.30.90.9---------------------------0.5

Average Number of Days Below -4F/-20C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2.31.20.80.1------------------------0.3

Average Number of Days Below -22F/-30C
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days---------------------------------------



TEMPERATURE - WIND CHILL 
Lowest Reported Wind Chill
Years on Record: 38  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F-41.6-41.6-36.2-22.1-1.618.932323224.315.2-4.6-25.6



TEMPERATURE - HUMIDEX 
Highest Reported Humidex
Years on Record: 38  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F121.862.970.68695101.8111.7121.8117.1110.894.878.972.2



PRECIPITATION 
Average Precipitation
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in34.6222.32.83.13.33.13.14.133.22.5

Average Number of Days With Precipitation
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days147.114.612.41313.211.610.910.710.311.311.313.314.4

Most Precipitation Reported in a Day
Years on Record: 39  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in3.81.61.51.821.63.52.92.33.82.52.11.5

Avg. No. of Days w/Precip. Above 0.1in/2.5mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1501511.912.91412.610.910.910.411.412.213.714.2

Avg. No. of Days w/Precip. Above 0.2in/5mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days53.23.23.24.15.154.74.34.65.34.64.64.6

Avg. # of Days w/Precip. Above 0.4in/10mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days271.21.61.72.22.82.42.32.53.52.62.51.7

Avg. No. of Days w/Precip. Above 1in/25mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days5.70.10.20.20.20.50.70.70.71.10.40.70.2



PRECIPITATION - RAIN 
Average Rainfall
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in30.30.911.52.63.13.33.13.14.1331.6

Average Number of Rainy Days
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days116.754.97.512.412.610.910.910.411.412.211.57.2

Most Rain Reported in a Day
Years on Record: 39  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in3.81.21.51.821.63.52.92.33.82.52.11.5

Avg. No. of Days w/Rain Above 0.2in/5mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days46.71.71.82.74.854.74.34.65.34.54.32.9

Avg. No. of Days w/Rain Above 0.4in/10mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days24.90.711.32.12.82.42.32.53.52.62.41.3

Avg. No. of Days w/Rain Above 1in/25mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days5.50.10.20.20.20.50.70.70.71.10.40.70.1



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in44.112.29.87.51.8---------------0.22.310.3

Average Number of Days With Snow
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days4411.69.16.92.4---------------0.53.79.9

Average Snow Cover
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in0.72.92.810.1------------------0.11.3

Average Snow Cover at Month End
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in0.63.12.20.2---------------------0.12.1

Deepest Snow Cover Reported
Years on Record: 37  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in23.623.616.9159.1---------------3.16.720.9

Most Snow Reported in a Day
Years on Record: 39  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in159.31313.18.4---------------77.315

Avg. No. of Days w/Snow Above 1in/2.5cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days41.411.38.472.4---------------0.239

Avg. No. of Days w/Snowfall Above 2in/5cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days6.61.71.51.40.2------------------0.21.7

Avg. No. of Days w/Snow Above 3.9in/10cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days20.50.50.4---------------------0.10.5

Avg. No. of Days w/Snowfall Above 10in/25cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days0.1------------------------------------

Av. # of Days w/Snow Depth Above 0.4in/10mm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days68.821.520.511.11.6------------------1.312.8

Avg. # of Days w/Snow Depth Above 2in/5cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days421414.46.40.2------------------0.36.6

Av. # of Days w/Snow Depth Above 3.9in/10cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days259.97.93.50.2------------------0.13.3

Av. # of Days w/Snow Depth Above 7.8in/20cm
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days7.13.22.30.8------------------------0.9



HUMIDITY 
Average Relative Humidity
Years on Record: 29  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%73777674706970697274747678

Average Morning Relative Humidity
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%85.983.582.88483.283.886.38991.590.586.684.884.7

Average Evening Relative Humidity
Years on Record: 2  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%67.47679.970.856.159.26259.66767.967.766.275.9

Average Dew Point
Years on Record: 29  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F40181925364657616054443222



DEGREE DAYS 
Heating Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days3882.2718.4633.7537.8347.3179.850.810.115.685.5252.3423.1627.8

Cooling Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days275.4------0.1214.451.599.678.8272------

Growing Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2079.5------------151.9432607.6558330---------



SKY CONDITIONS 
Average Length of Day
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Hours12.71011.112.51415.215.915.514.412.911.510.29.6

Average Monthly Sunshine
Years on Record: 23  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Hours2060.981.7100.3139.9185.2236.6266.3299.1254.3191.3151.287.667.4

Average Number of Days with Sun
Years on Record: 23  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days287.619.219.422.624.427.627.430.128.326.325.419.617.4

Average Possibility of Sunshine
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%4428.434.236.346.554.158.6645850.343.530.523.7

Most Sunshine Reported in a Day
Years on Record: 33  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Hours159.610.811.613.614.8151514.212.810.79.88.9



WIND 
Average Wind Speed
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
mph10.112.211.211.311.39.88.37.67.38.410.211.511.7

Highest Reported Hourly Wind Speed
Years on Record: 38  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
mph57.848.550.341.64640.434.832.941.634.844.751.657.8

Highest Reported Wind Gust
Years on Record: 34  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
mph98.862.172.798.867.771.554.163.454.157.865.967.777.1

Avg. # of Days w/Wind Above 32 mph/52 km/h
Years on Record: 23  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days16.22.12.12.21.91.10.60.40.30.611.92.1

Avg. # of Days w/Wind Above 39 mph/63 km/h
Years on Record: 23  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days4.70.50.60.80.80.40.10.10.20.10.20.50.6

Average Primary Wind Direction
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
°180270180180360360360360180180180180270



SOLAR RADIATION 
Average Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m23.61.32.13.24.55.56.26.25.34.12.61.51.2

Average Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m21.50.711.41.92.32.42.221.51.10.80.6

Average Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m23.92.233.94.655.45.65.24.83.62.22

Average Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m241.92.73.54.45.266.45.54.93.421.9

Maximum Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m23.61.32.13.24.55.56.26.25.34.12.61.51.2

Maximum Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m21.60.711.522.42.52.42.11.61.20.80.6

Maximum Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m24.82.7455.65.66.16.36.16.24.32.82.9

Maximum Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m25.42.74.15.36.26.37.78.17.37.34.42.83

Minimum Daily Solar Radiation - Global
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m22.80.91.723.84.54.84.54.63.221.10.9

Minimum Daily Solar Radiation - Diffuse
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m21.40.611.31.82.22.121.71.21.10.70.6

Minimum Daily Solar Radiation - Reflected
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m22.91.32.32.23.84.14.244.53.52.41.41.4

Minimum Daily Solar Radiation - Direct
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
kWh/m22.40.91.81.43.13.43.63.34.331.91.11.1




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