Observed at: St. Catharines / Niagara District Airport
Date: Wednesday March 20, 2019 at 20:00 EDT
Cloudy
Cloudy
Temp.: 6.0 °C
Wind: NE 5 km/h
Humidity: 56 %
Dew point: -2.2 °C
Pressure: 101.9 kPa
Tendency: falling
Visibility: 24.1 km
Sunrise: 07:21
Sunset: 19:28
Normals:
Max 7°C Min -2°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Thursday
Periods of rain
Periods of rain
Max: 8°C
Friday
Chance of flurries or rain showers (40%)
Chance of flurries or rain showers
Max: 2°C
Saturday
Sunny
Sunny
Max: 3°C
Sunday
Sunny
Sunny
Max: 7°C
Monday
Chance of flurries (30%)
Chance of flurries
Max: 1°C
Tuesday
Cloudy
Cloudy
Max: 0°C
Wednesday night
Periods of rain
Periods of rain
Min: 3°C
Thursday night
Mainly cloudy
Mainly cloudy
Min: 2°C
Friday night
Chance of flurries (30%)
Chance of flurries
Min: -6°C
Saturday night
Clear
Clear
Min: -2°C
Sunday night
Chance of flurries or rain showers (30%)
Chance of flurries or rain showers
Min: 0°C
Monday night
Cloudy
Cloudy
Min: -5°C

Forecast

St. Catharines, ON (Issued: Wednesday March 20, 2019 at 15:30 EDT)

Tonight
Becoming cloudy this evening then periods of rain. Wind southwest 20 km/h gusting to 40 becoming light early this evening. Low plus 3.
Thursday
Periods of rain ending in the afternoon then mainly cloudy. High 8. UV index 4 or moderate.
Thursday night
Mainly cloudy. Fog patches developing near midnight. Low plus 2.
Friday
Cloudy with 40 percent chance of flurries or rain showers. High plus 2.
Friday night
Cloudy with 30 percent chance of flurries. Windy. Low minus 6.
Saturday
Sunny. High plus 3.
Saturday night
Clear. Low minus 2.
Sunday
Sunny. High 7.
Sunday night
Cloudy with 30 percent chance of flurries or rain showers. Low zero.
Monday
Cloudy with 30 percent chance of flurries. High plus 1.
Monday night
Cloudy. Low minus 5.
Tuesday
Cloudy. High zero.
Averages and extremes
Highest temperature(1972-2000)22.2 °C1976
Lowest temperature(1972-2000)-12.0 °C1986
Average high6.2 °C 
Average low-2.5 °C 
Average1.9 °C 
Greatest rainfall(1972-2000)6.4 mm1995
Greatest snowfall(1972-2000)14.0 cm1996
Greatest precipitation(1972-2000)18.0 mm1996
Most snow on the ground(1972-2000)5.0 cm1973
Monthly frequency of precipitation43.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EDT)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
20 March 2019
21:00 4 Periods of rain (100%)  Periods of rain High SE 10
22:00 4 Periods of rain (100%)  Periods of rain High SE 10
23:00 3 Periods of rain (100%)  Periods of rain High SE 10
21 March 2019
00:00 3 Periods of rain (100%)  Periods of rain High SE 10
01:00 3 Periods of rain (100%)  Periods of rain High SE 10
02:00 3 Periods of rain (100%)  Periods of rain High S 15
03:00 3 Periods of rain (100%)  Periods of rain High S 15
04:00 3 Periods of rain (100%)  Periods of rain High S 15
05:00 3 Periods of rain (100%)  Periods of rain High S 15
06:00 3 Periods of rain (100%)  Periods of rain High S 15
07:00 3 Periods of rain (100%)  Periods of rain High S 15
08:00 3 Periods of rain (100%)  Periods of rain High S 15
09:00 4 Periods of rain (100%)  Periods of rain High S 15
10:00 4 Periods of rain (100%)  Periods of rain High S 15
11:00 5 Periods of rain (100%)  Periods of rain High S 15
12:00 6 Periods of rain (100%)  Periods of rain High S 15
13:00 6 Periods of rain (100%)  Periods of rain High S 15
14:00 7 Mainly cloudy (20%)  Mainly cloudy Low SW 15
15:00 7 Mainly cloudy (20%)  Mainly cloudy Low SW 15
16:00 8 Mainly cloudy (20%)  Mainly cloudy Low SW 15
17:00 8 Mainly cloudy (20%)  Mainly cloudy Low SW 15
18:00 8 Mainly cloudy (20%)  Mainly cloudy Low W 10
19:00 7 Mainly cloudy (20%)  Mainly cloudy Low W 10
20:00 7 Mainly cloudy (20%)  Mainly cloudy Low 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