Language selection

Government of Canada / Gouvernement du Canada

Search

My Weather Profile Weather Topics  | 

St. Thomas, ON

Current Conditions

Mostly Cloudy

Mostly Cloudy

21°C69°F

Wind:
SSW 14 km/h
SSW 9 mph
Humidex:
25
77
More details
Temperature:
20.7°C
69.3° F
Pressure:
102.1 kPa
30.2 inches
Dew point:
15.6°C
60.1°F
Visibility:
24 km
15 miles
Humidity:
72%
Date:
12:34 PM EDT Sunday 15 September 2019
Observed at:
London Int'l Airport
Past 24 hour ConditionsPast 24 hour Conditions
Weather Radar
Satellite
Lightning
Alerts
Jet Stream
Hourly Forecast
Historical Weather

ForecastForecast issued: 11:00 AM EDT Sunday 15 September 2019

Detailed ForecastForecast issued: 11:00 AM EDT Sunday 15 September 2019

Chance of showers
Today
22°C72°F
Mainly cloudy with 60 percent chance of showers. High 22. Humidex 25. UV index 4 or moderate.
Chance of showers
Tonight
15°C59°F
Mainly cloudy with 30 percent chance of showers. Low 15.
Chance of showers
Mon, 16 Sep
24°C75°F
A mix of sun and cloud with 30 percent chance of showers. High 24. Humidex 29. UV index 7 or high.
Night:  Clear. Low 11.
Sunny
Tue, 17 Sep
24°C75°F
Sunny. High 24.
Night:  Clear. Low 11.
Sunny
Wed, 18 Sep
26°C79°F
Sunny. High 26.
Night:  Clear. Low 14.
Sunny
Thu, 19 Sep
27°C81°F
Sunny. High 27.
Night:  Clear. Low 15.
A mix of sun and cloud
Fri, 20 Sep
27°C81°F
A mix of sun and cloud. High 27.
Night:  Clear. Low 16.
A mix of sun and cloud
Sat, 21 Sep
27°C81°F
A mix of sun and cloud. High 27.
Normals:
Max 21°C.70°F. Min 12°C.54°F.
Sunrise:
7:04 EDT
Sunset:
19:36 EDT

Averages and extremes

10 September
Average high
  • 22.0°C71.6°F
Average low
  • 10.7°C51.3°F
Highest temperature (1940-2002)
  • 33.3°C91.9°F
  • 1983
Lowest temperature (1940-2002)
  • 2.8°C37.0°F
  • 1973
Greatest precipitation (1940-2002)
  • 46.5 mm1.83 inches
  • 1945
Greatest rainfall (1940-2002)
  • 46.5 mm1.83 inches
  • 1945
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

11 September
Average high
  • 21.8°C71.2°F
Average low
  • 10.5°C50.9°F
Highest temperature (1940-2002)
  • 32.2°C90.0°F
  • 1952
Lowest temperature (1940-2002)
  • 2.2°C36.0°F
  • 1967
Greatest precipitation (1940-2002)
  • 35.6 mm1.4 inches
  • 1947
Greatest rainfall (1940-2002)
  • 35.6 mm1.4 inches
  • 1947
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

12 September
Average high
  • 21.6°C70.9°F
Average low
  • 10.3°C50.5°F
Highest temperature (1940-2002)
  • 32.2°C90.0°F
  • 1952
Lowest temperature (1940-2002)
  • 0.6°C33.1°F
  • 1941
Greatest precipitation (1940-2002)
  • 27.8 mm1.09 inches
  • 1996
Greatest rainfall (1940-2002)
  • 27.8 mm1.09 inches
  • 1996
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

13 September
Average high
  • 21.5°C70.7°F
Average low
  • 10.2°C50.4°F
Highest temperature (1940-2002)
  • 33.9°C93.0°F
  • 1952
Lowest temperature (1940-2002)
  • 2.2°C36.0°F
  • 1963
Greatest precipitation (1940-2002)
  • 31.0 mm1.22 inches
  • 1977
Greatest rainfall (1940-2002)
  • 31.0 mm1.22 inches
  • 1977
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

14 September
Average high
  • 21.3°C70.3°F
Average low
  • 10.0°C50.0°F
Highest temperature (1940-2002)
  • 30.6°C87.1°F
  • 1952
Lowest temperature (1940-2002)
  • 1.1°C34.0°F
  • 1975
Greatest precipitation (1940-2002)
  • 39.2 mm1.54 inches
  • 1990
Greatest rainfall (1940-2002)
  • 39.2 mm1.54 inches
  • 1990
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

15 September
Average high
  • 21.1°C70.0°F
Average low
  • 9.8°C49.6°F
Highest temperature (1940-2002)
  • 32.8°C91.0°F
  • 1991
Lowest temperature (1940-2002)
  • 2.8°C37.0°F
  • 1953
Greatest precipitation (1940-2002)
  • 39.6 mm1.56 inches
  • 1958
Greatest rainfall (1940-2002)
  • 39.6 mm1.56 inches
  • 1958
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

16 September
Average high
  • 20.9°C69.6°F
Average low
  • 9.6°C49.3°F
Highest temperature (1940-2002)
  • 30.8°C87.4°F
  • 1991
Lowest temperature (1940-2002)
  • 1.1°C34.0°F
  • 1966
Greatest precipitation (1940-2002)
  • 35.0 mm1.38 inches
  • 1977
Greatest rainfall (1940-2002)
  • 35.0 mm1.38 inches
  • 1977
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

17 September
Average high
  • 20.7°C69.3°F
Average low
  • 9.4°C48.9°F
Highest temperature (1940-2002)
  • 31.7°C89.1°F
  • 1955
Lowest temperature (1940-2002)
  • -1.1°C30.0°F
  • 1959
Greatest precipitation (1940-2002)
  • 29.7 mm1.17 inches
  • 1976
Greatest rainfall (1940-2002)
  • 29.7 mm1.17 inches
  • 1976
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

18 September
Average high
  • 20.5°C68.9°F
Average low
  • 9.3°C48.7°F
Highest temperature (1940-2002)
  • 32.8°C91.0°F
  • 1955
Lowest temperature (1940-2002)
  • -0.6°C30.9°F
  • 1943
Greatest precipitation (1940-2002)
  • 31.8 mm1.25 inches
  • 1992
Greatest rainfall (1940-2002)
  • 31.8 mm1.25 inches
  • 1992
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

19 September
Average high
  • 20.3°C68.5°F
Average low
  • 9.1°C48.4°F
Highest temperature (1940-2002)
  • 32.2°C90.0°F
  • 1955
Lowest temperature (1940-2002)
  • 1.7°C35.1°F
  • 1973
Greatest precipitation (1940-2002)
  • 29.4 mm1.16 inches
  • 2001
Greatest rainfall (1940-2002)
  • 29.4 mm1.16 inches
  • 2001
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

20 September
Average high
  • 20.1°C68.2°F
Average low
  • 8.9°C48.0°F
Highest temperature (1940-2002)
  • 29.4°C84.9°F
  • 1940
Lowest temperature (1940-2002)
  • 0.0°C32.0°F
  • 1973
Greatest precipitation (1940-2002)
  • 47.6 mm1.87 inches
  • 2002
Greatest rainfall (1940-2002)
  • 47.6 mm1.87 inches
  • 2002
Greatest snowfall (1940-2002)
  • 0.0 cm0.0 inches
Most snow on the ground (1955-2002)
  • 0.0 cm0.0 inches
Monthly frequency of precipitation
  • 40 %

Note that more recent Averages and Extremes information for this location may be available. Please visit the Historical Climate Data's Almanac Averages and Extremes page.

Yesterday's Data
Max:
21.9 °C71.4 °F
Min:
14.1 °C57.4 °F
Total Precipitation:
0.0 mm0.00 in

Follow:

  • WeatherCAN app

Follow:

No endorsement of any products or services is expressed or implied.

Follow:

  • Get it on Google Play - Link to a resource that is not part of a Government of Canada Web site. For more information, read the Important Notices in the footer of this page.
  • Download on the App Store - Link to a resource that is not part of a Government of Canada Web site. For more information, read the Important Notices in the footer of this page.

No endorsement of any products or services is expressed or implied.

Print Instructions

City Page - Print Instructions

  1. Use the collapsible arrows at the top of each section to hide or unhide the sections that you want to print.
  2. Use your browser's print action to print the displayed content on one page. Don't forget to pick your preferred paper size.

NOTE: The print layout will differ slightly from the web page display.

Weather shortcuts


How to use
  • Add to shortcuts
    • Go to the desired page on the site, open the Weather shortcuts menu and click on the "Add to shortcuts" button
    • Page name will display in the "Add this page" window, the name can be changed by highlighting the text and entering the desired name.
    • Click on the "Save" button to add the link to the list
    • Click on the "X" button to close the panel
  • Delete a link
    • Click on the "Organize shortcuts" button
    • Select the link to delete
    • Click on the "Delete" button to remove the link from the list
    • Click on the "Close" button to save the change
  • Move a link up/down the list
    • Click on the "Organize shortcuts" button
    • Click and hold the link and move to new location in the list
    • Click on the "Close" button to save the change
  • Rename a link
    • Click on the "Organize shortcuts" button
    • Select the link to rename
    • Click on the "Rename" button and change the link name
    • Click the enter or tab key
    • Click on the "Close" button to save the change
  • Keyboard navigation
    • Use the Tab key to move to a button or link
    • Use the Enter key to click on buttons or links
    • Organize shortcuts navigation
      • Use the ↑ Up key to select the link above. If none are selected, it will select the first link
      • Use the ↓ Down key to select the link below. If none are selected, it will select the last link
      • Use the Page Up key to move a selection up in the list
      • Use the Page Down key to move a selection down in the list
  • Restore default list

    Warning: Clicking on the button below will remove all your customized links.

What we are doing

Weather Forecasts

Weather Alerts

Weather Resources

Feedback about this web site
Date modified: