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Hourly Forecast - St. Thomas

HEAT WARNING

A prolonged heat event will begin today. Dangerously hot and humid conditions are expected through most of the week. Daytime highs through much of the week are expected to be 30 to 35 degrees Celsius with humidex values of 40 to 45. There will be little relief through the overnight as lows are expected to be 20 to 23 degrees Celsius with humidex values of 26 to 30. Temperatures and humidex values may be several degrees cooler near the shores of the Great Lakes. Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category. Extreme heat can affect everyone's health. The health risks are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues. Never leave people, particularly children, or pets inside a parked vehicle. Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions. Heat stroke is a medical emergency! Call 911 or your local emergency number immediately if you or someone you are caring for has a high body temperature and are confused, has stopped sweating or becomes unconscious. While waiting for help, cool the person right away: move them to a cool place, apply cold water to large areas of the skin and fan the person as much as possible. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.

In effect for:
  • Elgin
Date/Time
(EDT)
Temp.
(°C)
Weather ConditionsLikelihood of precip (%) Wind
(km/h)
Humidex
17 June 2024
13:00 29 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

70S 10
35
14:00 30 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

70S 10
37
15:00 30 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 15
37
16:00 31 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
39
17:00 31 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 20
39
18:00 30 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 15
38
19:00 29 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30SW 10
36
20:00 28 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30VR 5
35
21:00 27 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30SW 10
34
22:00 25 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30SW 10
32
23:00 24 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30SW 10
31
18 June 2024
00:00 23 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
30
01:00 23 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30VR 5
30
02:00 22 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
29
03:00 22 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
29
04:00 21 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
28
05:00 21 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
28
06:00 22 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
30
07:00 22 Chance of showers. Risk of thunderstorms

Chance of showers. Risk of thunderstorms

30S 10
30
08:00 23 A mix of sun and cloud

A mix of sun and cloud

20S 10
32
09:00 24 A mix of sun and cloud

A mix of sun and cloud

20S 10
33
10:00 26 A mix of sun and cloud

A mix of sun and cloud

20S 10
34
11:00 27 A mix of sun and cloud

A mix of sun and cloud

20S 10
35
12:00 28 A mix of sun and cloud

A mix of sun and cloud

20S 15
36

* Value not significant

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