Observed at: St. Catharines / Niagara District Airport
Date: Thursday May 23, 2019 at 15:00 EDT
Partly Cloudy
Partly Cloudy
Temp.: 24.2 °C
Humidex: 30
Wind: SW 36 gust 48 km/h
Humidity: 67 %
Dew point: 17.9 °C
Pressure: 100.9 kPa
Tendency: falling
Visibility: 24.1 km
Sunrise: 05:46
Sunset: 20:41
Normals:
Max 21°C Min 10°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Friday
Mainly sunny
Mainly sunny
Max: 21°C
Saturday
Chance of showers (70%)
Chance of showers
Max: 23°C
Sunday
Sunny
Sunny
Max: 21°C
Monday
Sunny
Sunny
Max: 18°C
Tuesday
Sunny
Sunny
Max: 18°C
Wednesday
Chance of showers (60%)
Chance of showers
Max: 19°C
Thursday night
A few clouds
A few clouds
Min: 11°C
Friday night
Partly cloudy
Partly cloudy
Min: 11°C
Saturday night
Chance of showers (60%)
Chance of showers
Min: 15°C
Sunday night
Clear
Clear
Min: 13°C
Monday night
Clear
Clear
Min: 11°C
Tuesday night
Cloudy periods
Cloudy periods
Min: 13°C

Forecast

St. Catharines, ON (Issued: Thursday May 23, 2019 at 15:30 EDT)

Tonight
A few clouds. Wind southwest 40 km/h gusting to 60 becoming west 20 this evening. Low 11.
Friday
Mainly sunny. Wind west 20 km/h becoming light late in the morning. High 21. UV index 9 or very high.
Friday night
Partly cloudy. Low 11.
Saturday
Cloudy with 70 percent chance of showers. High 23.
Saturday night
Cloudy with 60 percent chance of showers. Low 15.
Sunday
Sunny. High 21.
Sunday night
Clear. Low 13.
Monday
Sunny. High 18.
Monday night
Clear. Low 11.
Tuesday
Sunny. High 18.
Tuesday night
Cloudy periods. Low 13.
Wednesday
Cloudy with 60 percent chance of showers. High 19.
Averages and extremes
Highest temperature(1972-2000)30.6 °C1991
Lowest temperature(1972-2000)3.3 °C1976
Average high20.8 °C 
Average low9.2 °C 
Average15.0 °C 
Greatest rainfall(1972-2000)26.6 mm1984
Greatest snowfall(1972-2000)0.0 cm1972
Greatest precipitation(1972-2000)26.6 mm1984
Most snow on the ground(1972-2000)0.0 cm1972
Monthly frequency of precipitation37.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EDT)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
23 May 2019
17:00 19 A mix of sun and cloud (20%)  A mix of sun and cloud Low SW 40 gust 60
18:00 18 A mix of sun and cloud (20%)  A mix of sun and cloud Low SW 40 gust 60
19:00 17 A mix of sun and cloud (20%)  A mix of sun and cloud Low SW 40 gust 60
20:00 16 Mainly sunny (0%)  Mainly sunny Nil W 20
21:00 15 A few clouds (0%)  A few clouds Nil W 20
22:00 14 A few clouds (0%)  A few clouds Nil W 20
23:00 13 A few clouds (0%)  A few clouds Nil W 20
24 May 2019
00:00 12 A few clouds (0%)  A few clouds Nil W 20
01:00 12 A few clouds (0%)  A few clouds Nil W 20
02:00 11 A few clouds (0%)  A few clouds Nil W 20
03:00 11 A few clouds (0%)  A few clouds Nil W 20
04:00 11 A few clouds (0%)  A few clouds Nil W 20
05:00 11 A few clouds (0%)  A few clouds Nil W 20
06:00 11 Mainly sunny (0%)  Mainly sunny Nil W 20
07:00 12 Mainly sunny (0%)  Mainly sunny Nil W 20
08:00 12 Mainly sunny (0%)  Mainly sunny Nil W 20
09:00 14 Mainly sunny (0%)  Mainly sunny Nil W 20
10:00 15 Mainly sunny (0%)  Mainly sunny Nil W 20
11:00 17 Mainly sunny (0%)  Mainly sunny Nil W 10
12:00 18 Mainly sunny (0%)  Mainly sunny Nil W 10
13:00 18 Mainly sunny (0%)  Mainly sunny Nil W 10
14:00 19 Mainly sunny (0%)  Mainly sunny Nil W 10
15:00 20 Mainly sunny (0%)  Mainly sunny Nil W 10
16:00 20 Mainly sunny (0%)  Mainly sunny 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