Observed at: St. Catharines / Niagara District Airport
Date: Friday December 06, 2019 at 16:00 EST
Mostly Cloudy
Mostly Cloudy
Temp.: 1.0 °C
Wind: WNW 17 km/h
Humidity: 70 %
Dew point: -3.8 °C
Pressure: 102.0 kPa
Tendency: rising
Visibility: 24.1 km
Sunrise: 07:34
Sunset: 16:42
Normals:
Max 3°C Min -3°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Saturday
A mix of sun and cloud
A mix of sun and cloud
Max: 0°C
Sunday
Cloudy
Cloudy
Max: 5°C
Monday
Rain
Rain
Max: 9°C
Tuesday
Chance of flurries (40%)
Chance of flurries
Max: 1°C
Wednesday
A mix of sun and cloud
A mix of sun and cloud
Max: -4°C
Thursday
A mix of sun and cloud
A mix of sun and cloud
Max: -4°C
Friday night
Chance of flurries (30%)
Chance of flurries
Min: -5°C
Saturday night
A few clouds
A few clouds
Min: -3°C *
Sunday night
Periods of rain (70%)
Periods of rain
Min: 5°C
Monday night
Rain showers or flurries
Rain showers or flurries
Min: 1°C
Tuesday night
Chance of flurries (30%)
Chance of flurries
Min: -7°C
Wednesday night
Chance of flurries (30%)
Chance of flurries
Min: -8°C

* - Denotes an abnormal temperature trend.

Forecast

St. Catharines, ON (Issued: Friday December 06, 2019 at 15:30 EST)

Tonight
Mainly cloudy with 30 percent chance of flurries. Wind northwest 20 km/h gusting to 40 becoming light late this evening. Low minus 5. Wind chill minus 11 overnight.
Saturday
Clearing. Wind up to 15 km/h. High zero. Wind chill minus 6 in the morning. UV index 1 or low.
Saturday night
A few clouds. Wind becoming south 20 km/h before morning. Low minus 3 with temperature rising to plus 1 by morning. Wind chill minus 7 in the evening.
Sunday
Cloudy. Windy. High plus 5.
Sunday night
Cloudy with 70 percent chance of rain. Windy. Low plus 5.
Monday
Rain. High 9.
Monday night
Rain showers or flurries. Low plus 1.
Tuesday
Cloudy with 40 percent chance of flurries. Windy. High plus 1.
Tuesday night
Cloudy periods with 30 percent chance of flurries. Low minus 7.
Wednesday
A mix of sun and cloud. High minus 4.
Wednesday night
Cloudy periods with 30 percent chance of flurries. Low minus 8.
Thursday
A mix of sun and cloud. High minus 4.
Averages and extremes
Highest temperature(1971-2000)20.5 °C1998
Lowest temperature(1971-2000)-9.6 °C2000
Average high3.9 °C 
Average low-2.9 °C 
Average0.5 °C 
Greatest rainfall(1971-2000)20.5 mm1983
Greatest snowfall(1971-2000)12.0 cm1984
Greatest precipitation(1971-2000)23.5 mm1983
Most snow on the ground(1971-2000)12.0 cm1984
Monthly frequency of precipitation49.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EST)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
Wind
Chill
6 December 2019
17:00 1 Partly cloudy (0%)  Partly cloudy Nil NW 20 gust 40
18:00 0 Chance of flurries (30%)  Chance of flurries Low W 20
19:00 0 Chance of flurries (30%)  Chance of flurries Low W 20
20:00 -1 Chance of flurries (30%)  Chance of flurries Low W 20 -6
21:00 -1 Chance of flurries (30%)  Chance of flurries Low W 20 -7
22:00 -2 Chance of flurries (30%)  Chance of flurries Low NW 15 -7
23:00 -2 Chance of flurries (30%)  Chance of flurries Low NW 15 -7
7 December 2019
00:00 -3 Chance of flurries (30%)  Chance of flurries Low NW 15 -8
01:00 -3 Chance of flurries (30%)  Chance of flurries Low NW 15 -8
02:00 -4 Chance of flurries (30%)  Chance of flurries Low NW 15 -9
03:00 -4 Chance of flurries (30%)  Chance of flurries Low NW 15 -10
04:00 -5 Chance of flurries (30%)  Chance of flurries Low NW 15 -11
05:00 -4 Chance of flurries (30%)  Chance of flurries Low NW 15 -10
06:00 -4 Mainly cloudy (0%)  Mainly cloudy Nil VR 5 -6
07:00 -3 Mainly cloudy (0%)  Mainly cloudy Nil VR 5 -5
08:00 -2 Mainly cloudy (0%)  Mainly cloudy Nil VR 5 -4
09:00 -2 Mainly cloudy (0%)  Mainly cloudy Nil VR 5 -3
10:00 -1 Mainly sunny (0%)  Mainly sunny Nil VR 5 -3
11:00 -1 Mainly sunny (0%)  Mainly sunny Nil VR 5 -2
12:00 0 Mainly sunny (0%)  Mainly sunny Nil VR 5
13:00 0 Mainly sunny (0%)  Mainly sunny Nil VR 5
14:00 0 Mainly sunny (0%)  Mainly sunny Nil VR 5
15:00 0 Mainly sunny (0%)  Mainly sunny Nil VR 5
16:00 0 Mainly sunny (0%)  Mainly sunny Nil VR 5
 
† 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%
‡ Value not significant

Environment Canada