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CHALK RIVER, ONTARIO


Home > North America > Canada > Ontario
Elevation: 400 feet     Latitude: 46 03N     Longitude: 77 22W

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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 
F4210.815.526.841.954.46468.566.357.845.633.219.6

Average High Temperature
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F51.519.925.836.952.265.675.179.276.667.253.639.526.9

Average Low Temperature
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F32.51.95.216.631.543.252.857.655.948.437.626.912.3

Highest Recorded Temperature
Years on Record: 46  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F102.952597589.193.296.8102.99994.185.17258.1

Lowest Recorded Temperature
Years on Record: 46  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F-38.2-38.2-32.1-25.6-2.91628.937.926.628.415.8-5.8-36.4

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 
Days0.5------------------0.30.1------------

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 
Days10---------0.11.32.43.82.10.2---------

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 
Days11---------0.20.92.94.22.50.4---------

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 
Days109.1------0.22.811.823.429.126.712.72.4------

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 
Days192.2---0.43.515.528.630313129.318.63.90.3

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 
Days281.25.5820.529.2313031313030.923.410.8

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 
Days191.93128.129.921.37.20.3---0.12.614.626.130.7

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 
Days170.430.627.528.417.24------0.10.99.422.629.7

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 
Days13429.52623.510.30.8------------314.626.3

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 
Days72.322.719.411.60.7------------------2.815.1

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 
Days25.911.27.72.6---------------------0.14.3

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 
Days2.91.80.7---------------------------0.4



PRECIPITATION 
Average Precipitation
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in33.82.21.72.22.33.43.43.33.23.53.332.3

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 
Days158.51510.811.510.712.613.913.413.214.813.514.614.4

Most Precipitation Reported in a Day
Years on Record: 46  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in2.81.11.41.91.42.32.82.72.82.61.71.61.1

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 
Days165.315.511.811.311.713.613.713.912.914.41515.815.8

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 
Days55.73.92.93.94.25.35.35.34.85.55.45.24.1

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 
Days26.41.41.21.71.83.12.82.42.72.932.31.3

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 
Days3.8---0.10.10.20.50.60.50.60.40.50.30.1



PRECIPITATION - RAIN 
Average Rainfall
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in26.90.60.41.123.33.43.33.23.53.12.10.7

Average Number of Rainy Days
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days115.92.72.44.89.713.613.713.912.914.414.39.73.9

Most Rain Reported in a Day
Years on Record: 46  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in2.81.111.41.42.32.82.72.82.61.71.50.9

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 
Days43.81.20.723.55.35.35.34.85.55.23.51.5

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 
Days22.60.50.411.532.82.42.72.92.81.90.6

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 
Days3.5------0.10.10.40.60.50.60.40.40.2---



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in71.716.713.511.13.70.7------------1.48.915.8

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 
Days53.613.49.77.62.70.1------------0.87.211.9

Average Snow Cover
Years on Record: 8  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in4.112.11614.30.4------------------0.55.2

Average Snow Cover at Month End
Years on Record: 7  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in3.514.817.12.5---------------------1.96.5

Deepest Snow Cover Reported
Years on Record: 8  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in26.821.725.226.811.80.4---------------7.116.9

Most Snow Reported in a Day
Years on Record: 46  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in15.811.214.115.810.25.1---------0.16.312.411

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 
Days56.513.910.57.52.90.3------------17.712.7

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 
Days12.532.32.10.50.1------------0.31.42.9

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 
Days3.60.90.70.50.20.1------------0.10.40.7

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 
Days0.2---------------------------------0.1

Av. # of Days w/Snow Depth Above 0.4in/10mm
Years on Record: 5  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days122.13128.328.83.40.1---------------624.6

Avg. # of Days w/Snow Depth Above 2in/5cm
Years on Record: 5  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days119.13128.328.82.6------------------4.524

Av. # of Days w/Snow Depth Above 3.9in/10cm
Years on Record: 5  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days112.330.828.328.81.4------------------2.520.6

Av. # of Days w/Snow Depth Above 7.8in/20cm
Years on Record: 5  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days86.226.328.327.50.8---------------------3.4



DEGREE DAYS 
Heating Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days4846933.3785651.1388.4179.654.613.932.9140.2332.5530.6803.9

Cooling Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days192.4---------0.811.438.47655.69.80.4------

Growing Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1796.4------------145.7405558486.7201---------



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 
Hours12.89.710.912.514.115.616.315.914.61311.4109.3



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/m23.51.62.63.84.75.15.65.54.83.52.31.41.2

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/m21.70.91.31.81.92.52.62.52.21.71.20.80.7

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/m23.92.73.94.84.94.74.94.94.7432.22.1

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/m23.62.43.54.254.44.84.94.33.52.71.91.9

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/m23.51.62.63.84.75.15.65.54.83.52.31.41.2

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/m21.811.41.922.52.72.62.31.81.30.90.9

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/m24.63.24.55.55.85.75.55.95.44.73.62.52.8

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/m24.62.94.24.86.26.26.16.85.74.53.42.12.6

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/m22.91.42.13.33.73.84.653.92.91.81.21

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/m21.60.81.11.71.82.42.62.52.21.610.80.6

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/m23.22.43.14.23.83.54.14.43.83.12.31.81.6

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/m22.622.73.53.42.43.23.92.92.421.51.3




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