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LONDON - AIRPORT, ONTARIO


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Elevation: 912 feet     Latitude: 43 01N     Longitude: 81 09W

WEATHER
 
CURRENT CONDITIONS

Sunrise/Set
06:11 am
08:30 pm

Local Time
9:50 am EDT
5 May, 2024
 
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MONTHLY - ALL WEATHER AVERAGES   [ Show Summary ]
[ °C ]   °F
TEMPERATURE 
Average Temperature
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F46.12223.831.944.355.66569.467.46048.638.227.3

Average High Temperature
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F54.828.631.239.953.766.175.379.577.67057.544.933.5

Average Low Temperature
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F37.415.516.623.834.74554.759.157.249.939.731.321.1

Highest Recorded Temperature
Years on Record: 62  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F100.862.16476.684.990.3100.898.198.693.98675.965.3

Lowest Recorded Temperature
Years on Record: 62  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F-25.1-25.1-21.1-12.6102330.94134.726.112-0.9-16.4

Average Number of Days Above 95F/35C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days0.4---------------0.10.30.1------------

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 
Days8.1------------0.31.93.71.80.5---------

Average Number of Days Above 86F/30C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days9.9------------0.32.24.62.20.6---------

Average Number of Days Above 70F/21C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days122.5------0.83.112.924.83029.117.64.10.2---

Average Number of Days Above 50F/10C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days211.90.60.76.218.629.429.9313129.823.892

Average Number of Days Above 32F/0C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days308.612.113.923.229.631303131303127.318.6

Average Number of Days Below 35F/2C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days170.730.327.62817.44.10.1---0.10.910.921.929.6

Average Number of Days Below 32F/0C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days142.328.626.125.311.91.4---------0.35.116.527.1

Average Number of Days Below 28F/-2C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days108.926.322.620.55.80.1------------1.310.322

Average Number of Days Below 10F/-12C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days38.713.311.35.40.1------------------0.68

Average Number of Days Below -4F/-20C
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days3.81.91.50.1------------------------0.4

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



TEMPERATURE - WIND CHILL 
Avg. # of Days w/Wind Chill Below -4F/-20C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days19.98.55.81.90.1------------------0.13.5

Av. # of Days w/Wind Chill Below -22F/-30C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1.610.4---------------------------0.2

Av. # of Days w/Wind Chill Below -40F/-40C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days0.10.1---------------------------------

Lowest Reported Wind Chill
Years on Record: 58  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F-42.1-42.1-31-25.9-813.428.4323222.67.5-14-32.4



TEMPERATURE - HUMIDEX 
Average No. Days w/Humidex Above 104F/40C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2.5---------------0.31.40.70.1---------

Average No. Days w/Humidex Above 95F/35C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days18.1------------0.53.87.45.40.90.2------

Average No. Days w/Humidex Above 86F/30C
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days52.4---------0.431017.315.45.90.5------

Highest Reported Humidex
Years on Record: 58  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
F12261.56684.393.1104.3111.3122115.7108.498.577.271.7



PRECIPITATION 
Average Precipitation
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in39.82.92.62.83.33.53.63.33.34.13.23.93.4

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 
Days170.419.415.715.813.712.211.610.910.912.113.116.218.7

Most Precipitation Reported in a Day
Years on Record: 66  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in3.51.82.31.72.62.33.32.52.83.52.22.21.8

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 
Days16818.815.115.314.112.711.611.210.412.113.115.818

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 
Days61.64.83.955.55.85.24.64.65.35.15.95.8

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 
Days31.71.81.822.733.12.63.13.62.72.92.6

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 
Days6.40.20.40.40.30.70.80.80.60.90.40.60.4



PRECIPITATION - RAIN 
Average Rainfall
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in33.31.31.31.82.93.53.63.33.34.13.13.31.8

Average Number of Rainy Days
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days122.46.35.48.31212.711.611.310.412.11311.67.8

Most Rain Reported in a Day
Years on Record: 66  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in3.51.82.31.72.62.33.32.52.83.52.22.21.8

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 
Days50.92.22.23.34.85.75.24.64.65.34.853.2

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 
Days28.51.21.21.32.633.12.63.13.62.62.71.7

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 
Days5.60.10.20.30.30.70.80.80.60.90.40.50.1



PRECIPITATION - SNOW 
Average Snowfall
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in76.519.415.111.63.70.2------------1.36.518.7

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 
Days65.616.512.89.73.60.2------------1.3714.4

Average Snow Cover
Years on Record: 26  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in0.943.91.40.1------------------0.22

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 
in0.84.32.40.2---------------------0.22.6

Deepest Snow Cover Reported
Years on Record: 52  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in27.627.218.516.97.9---------------5.120.127.6

Most Snow Reported in a Day
Years on Record: 66  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
in22.412.811.810.88.62.3------------6.21622.4

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 
Days60.315.312.19.13.50.2------------1.25.713.2

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 
Days13.23.32.42.10.60.1------------0.11.23.5

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 
Days3.70.80.80.60.2------------------0.31

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: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days83.524.822.314.21.3---------------0.3416.6

Avg. # of Days w/Snow Depth Above 2in/5cm
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days57.11917.88.30.5------------------1.110.4

Av. # of Days w/Snow Depth Above 3.9in/10cm
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days36.313.712.44.60.2------------------0.25.1

Av. # of Days w/Snow Depth Above 7.8in/20cm
Years on Record: 25  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days14.274.51------------------------1.7



HUMIDITY 
Average Morning Relative Humidity
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%84.883.581.481.279.880.784.588.19190.787.284.984.4

Average Evening Relative Humidity
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%64.275.971.96556.954.85757.659.759.963.17276.9



DEGREE DAYS 
Heating Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days4057.7751.8664.9566.2351.316747.210.819.6102.7278.9446.7650.6

Cooling Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days235.7------0.11.112.547.287.465.520.81.1------

Growing Degree Days
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days2000.4------------167.4432585.9530.1285---------



BAROMETER 
Average Sea Level Pressure
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
InHg3030303030303030303030.13030

Average Station Pressure
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
InHg29.229.229.229.229.229.129.129.129.129.229.229.229.2

Average Vapor Pressure
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
InHg0.10.10.10.10.10.20.30.50.50.50.40.30.2



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: 16  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Hours1792.664.489.9124158219.6244.3261.6217.7165.1128.767.452.1

Average Number of Days with Sun
Years on Record: 16  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days286.218.119.122.924.227.828.53029.125.926.118.416.2

Average Possibility of Sunshine
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
%38.222.630.932.440.448.65356.351.443.337.423.818.6

Most Sunshine Reported in a Day
Years on Record: 46  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Hours15.69.410.611.714.31515.215.614.612.510.99.89

Avg. No. of Days Visibility Above 5.5m/9km
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days6808.5489.6465.8568.3610.6626604.2620.7588.4571.9614547.8501.3

Avg. No. of Days Visibility Below 5.5m/9km
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days1787.9229.5185.4155.7103.2112109.7117144.4134.7116.6161.2218.4

Avg. No. of Days Visibility Below 0.6m/1km
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days169.224.926.4206.166.16.311.313.413.31124.4



WIND 
Average Wind Speed
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
mph8.710.810.110.110.18.77.46.666.98.39.710.2

Highest Reported Hourly Wind Speed
Years on Record: 58  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
mph57.854.142.357.84655.349.739.134.83640.444.746

Highest Reported Wind Gust
Years on Record: 48  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
mph9279.565.972.175.862.19277.175.248.562.162.164.6

Avg. # of Days w/Wind Above 32 mph/52 km/h
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days91.20.81.61.20.60.40.40.20.30.80.51

Avg. # of Days w/Wind Above 39 mph/63 km/h
Years on Record: 22  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
Days30.40.10.50.40.20.30.20.10.10.2---0.6

Average Primary Wind Direction
Years on Record: 30  Chart This
 ANNUAL  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC 
°27027027090909031527031590270270270



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/m23.61.72.63.44.35.25.95.9542.61.51.3

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/m21.50.711.41.92.32.42.321.61.10.80.6

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/m24.13.23.94.24.44.85.25.34.94.63.62.42.5

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/m24.13.2444.14.75.55.754.73.42.22.5

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/m23.61.72.63.44.35.25.95.9542.61.51.3

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/m24.944.45.15.35.55.95.95.75.84.42.93.3

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/m25.44.24.75.45.76.17.27.26.46.74.62.83.4

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/m231.62.12.73.54.44.84.84.53.12.11.21.1

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/m21.40.60.91.31.82.22.22.11.91.31.10.70.6

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/m23.22.82.933.644.24.34.33.32.71.61.7

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/m22.72.72.82.42.83.33.63.742.72.21.31.5




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