Observed at: St. Catharines / Niagara District Airport
Date: Friday May 09, 2025 at 02:00 EDT
Temp.: 3.5 °C
Wind: WSW 5 km/h
Humidity: 99 %
Dew point: 3.3 °C
Pressure: 102.1 kPa
Tendency:
Sunrise: 06:00
Sunset: 20:27
Normals:
Max 18°C Min 8°C
 Extended Forecast - Environment Canada
  Friday
A mix of sun and cloud
A mix of sun and cloud
Max: 14°C
 Saturday
Sunny
Sunny
Max: 17°C
 Sunday
Sunny
Sunny
Max: 16°C
 Monday
Sunny
Sunny
Max: 22°C
 Tuesday
Sunny
Sunny
Max: 21°C
 Wednesday
Chance of showers (40%)
Chance of showers
Max: 20°C
Thursday night
Clearing
Clearing
Min: 3°C
 Friday night
A few clouds
A few clouds
Min: 2°C
 Saturday night
Clear
Clear
Min: 7°C
 Sunday night
Clear
Clear
Min: 11°C
 Monday night
Clear
Clear
Min: 13°C
 Tuesday night
Chance of showers (40%)
Chance of showers
Min: 14°C

Forecast

St. Catharines, ON (Issued: Thursday May 08, 2025 at 15:54 EDT)

Tonight
Clearing early this evening. Low plus 3 with risk of frost.
Friday
A mix of sun and cloud. High 14. UV index 6 or high.
Friday night
Clearing in the evening. Low plus 2 with risk of frost.
Saturday
Sunny. High 17.
Saturday night
Clear. Low 7.
Sunday
Sunny. High 16.
Sunday night
Clear. Low 11.
Monday
Sunny. High 22.
Monday night
Clear. Low 13.
Tuesday
Sunny. High 21.
Tuesday night
Cloudy with 40 percent chance of showers. Low 14.
Wednesday
Cloudy with 40 percent chance of showers. High 20.

24 Hour Forecast - St. Catharines, ON

Date/Time
(EDT)		 Temp.
(°C)
Weather Conditions
LOP †		 Wind
(km/h)
9 May 2025
03:00 4 Clear (0%)  Clear Nil VR 5
04:00 3 A few clouds (0%)  A few clouds Nil VR 5
05:00 3 Partly cloudy (0%)  Partly cloudy Nil VR 5
06:00 4 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
07:00 6 Mainly cloudy (0%)  Mainly cloudy Nil VR 5
08:00 7 Mainly cloudy (0%)  Mainly cloudy Nil N 10
09:00 8 A mix of sun and cloud (0%)  A mix of sun and cloud Nil N 10
10:00 9 A mix of sun and cloud (0%)  A mix of sun and cloud Nil N 10
11:00 10 A mix of sun and cloud (0%)  A mix of sun and cloud Nil N 10
12:00 11 A mix of sun and cloud (0%)  A mix of sun and cloud Nil N 10
13:00 12 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
14:00 13 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
15:00 13 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
16:00 14 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
17:00 14 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
18:00 13 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
19:00 13 A mix of sun and cloud (0%)  A mix of sun and cloud Nil VR 5
20:00 12 A few clouds (0%)  A few clouds Nil VR 5
21:00 11 Clear (0%)  Clear Nil NW 10
22:00 9 Clear (0%)  Clear Nil NW 10
23:00 8 Clear (0%)  Clear Nil NW 10
10 May 2025
00:00 6 Clear (0%)  Clear Nil NW 10
01:00 5 Clear (0%)  Clear Nil W 10
02:00 3 Clear (0%)  Clear Nil W 10
 
† 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