HEAT WARNING

Observed at: St. Catharines / Niagara District Airport
Date: Sunday July 05, 2020 at 18:00 EDT
Partly Cloudy
Partly Cloudy
Temp.: 31.9 °C
Humidex: 34
Wind: N 10 km/h
Humidity: 29 %
Dew point: 12.0 °C
Pressure: 101.3 kPa
Tendency:
Visibility: 24.1 km
Sunrise: 05:44
Sunset: 21:00
Normals:
Max 27°C Min 16°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Monday
Chance of showers (30%)
Chance of showers
Max: 32°C
Tuesday
Sunny
Sunny
Max: 32°C
Wednesday
Sunny
Sunny
Max: 30°C
Thursday
Sunny
Sunny
Max: 32°C
Friday
Sunny
Sunny
Max: 31°C
Saturday
Chance of showers (60%)
Chance of showers
Max: 26°C
Sunday night
A few clouds
A few clouds
Min: 20°C
Monday night
Chance of showers (30%)
Chance of showers
Min: 20°C
Tuesday night
Clear
Clear
Min: 23°C
Wednesday night
Clear
Clear
Min: 22°C
Thursday night
Clear
Clear
Min: 23°C
Friday night
Chance of showers (60%)
Chance of showers
Min: 21°C

Forecast

St. Catharines, ON (Issued: Sunday July 05, 2020 at 15:30 EDT)

Tonight
A few clouds. Low 20.
Monday
Sunny in the morning and early in the afternoon then a mix of sun and cloud with 30 percent chance of showers late in the afternoon. Risk of a thunderstorm late in the afternoon. High 32. Humidex 37. UV index 9 or very high.
Monday night
Partly cloudy. 30 percent chance of showers early in the evening with risk of a thunderstorm. Low 20.
Tuesday
Sunny. High 32.
Tuesday night
Clear. Low 23.
Wednesday
Sunny. High 30.
Wednesday night
Clear. Low 22.
Thursday
Sunny. High 32.
Thursday night
Clear. Low 23.
Friday
Sunny. High 31.
Friday night
Cloudy with 60 percent chance of showers. Low 21.
Saturday
Cloudy with 60 percent chance of showers. High 26.
Averages and extremes
Highest temperature(1971-2000)34.3 °C1999
Lowest temperature(1971-2000)9.7 °C1997
Average high26.6 °C 
Average low15.9 °C 
Average21.3 °C 
Greatest rainfall(1971-2000)23.2 mm1991
Greatest snowfall(1971-2000)0.0 cm1971
Greatest precipitation(1971-2000)23.2 mm1991
Most snow on the ground(1971-2000)0.0 cm1971
Monthly frequency of precipitation31.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EDT)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)

Humidex
5 July 2020
19:00 30 Mainly sunny (0%)  Mainly sunny Nil W 10 35
20:00 29 Mainly sunny (0%)  Mainly sunny Nil W 10 34
21:00 27 A few clouds (0%)  A few clouds Nil W 10 32
22:00 25 A few clouds (0%)  A few clouds Nil W 10 30
23:00 23 A few clouds (0%)  A few clouds Nil VR 5 28
6 July 2020
00:00 22 A few clouds (0%)  A few clouds Nil VR 5 27
01:00 22 A few clouds (0%)  A few clouds Nil VR 5 27
02:00 21 A few clouds (0%)  A few clouds Nil VR 5 26
03:00 21 Clear (0%)  Clear Nil VR 5 26
04:00 20 Clear (0%)  Clear Nil VR 5 25
05:00 20 Clear (0%)  Clear Nil VR 5 25
06:00 21 Sunny (0%)  Sunny Nil VR 5 27
07:00 22 Sunny (0%)  Sunny Nil VR 5 28
08:00 23 Sunny (0%)  Sunny Nil VR 5 30
09:00 24 Sunny (0%)  Sunny Nil NE 15 30
10:00 25 Sunny (0%)  Sunny Nil NE 15 31
11:00 26 Sunny (0%)  Sunny Nil NE 15 31
12:00 27 Sunny (0%)  Sunny Nil NE 15 32
13:00 28 Sunny (0%)  Sunny Nil NE 15 33
14:00 29 Sunny (0%)  Sunny Nil NE 15 34
15:00 30 Chance of showers. Risk of thunderstorms (30%)  Chance of showers. Risk of thunderstorms Low NE 15 35
16:00 31 Chance of showers. Risk of thunderstorms (30%)  Chance of showers. Risk of thunderstorms Low NE 15 36
17:00 32 Chance of showers. Risk of thunderstorms (30%)  Chance of showers. Risk of thunderstorms Low NE 15 37
18:00 30 Chance of showers. Risk of thunderstorms (30%)  Chance of showers. Risk of thunderstorms Low NE 15 35
 
† Likelihood of Precipitation (LOP) as described in the public forecast as a chance of measurable precipitation for a period of time.
  Nil: 0%
  Low: 40% or below
  Medium: 60% or 70%
  High: Above 70%

Environment Canada