Observed at: St. Catharines / Niagara District Airport
Date: Wednesday January 16, 2019 at 16:00 EST
Partly Cloudy
Partly Cloudy
Temp.: -2.5 °C
Wind Chill: -9
Wind: NW 22 gust 34 km/h
Humidity: 54 %
Dew point: -10.6 °C
Pressure: 102.3 kPa
Tendency: rising
Visibility: 24.1 km
Sunrise: 07:46
Sunset: 17:08
Normals:
Max -2°C Min -8°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Thursday
Mainly cloudy
Mainly cloudy
Max: -4°C
Friday
Chance of flurries (30%)
Chance of flurries
Max: -1°C
Saturday
Periods of snow
Periods of snow
Max: -7°C
Sunday
Chance of flurries (60%)
Chance of flurries
Max: -10°C
Monday
Chance of flurries (30%)
Chance of flurries
Max: -7°C
Tuesday
Chance of flurries (30%)
Chance of flurries
Max: -2°C
Wednesday night
A few clouds
A few clouds
Min: -11°C
Thursday night
Periods of snow
Periods of snow
Min: -3°C *
Friday night
Chance of flurries (30%)
Chance of flurries
Min: -9°C
Saturday night
Periods of snow
Periods of snow
Min: -11°C
Sunday night
Clear
Clear
Min: -15°C
Monday night
Chance of flurries (30%)
Chance of flurries
Min: -8°C

* - Denotes an abnormal temperature trend.

Forecast

St. Catharines, ON (Issued: Wednesday January 16, 2019 at 15:30 EST)

Tonight
A few clouds. Wind northwest 30 km/h gusting to 50 becoming light this evening. Low minus 11. Wind chill near minus 15.
Thursday
A mix of sun and cloud. Becoming cloudy in the afternoon. Wind up to 15 km/h. High minus 4. Wind chill minus 14 in the morning and minus 7 in the afternoon. UV index 1 or low.
Thursday night
Cloudy. Periods of snow beginning early in the evening. Wind up to 15 km/h. Temperature rising to minus 2 by morning. Wind chill near minus 8.
Friday
Cloudy with 30 percent chance of flurries. High minus 1.
Friday night
Cloudy with 30 percent chance of flurries. Low minus 9.
Saturday
Periods of snow. High minus 7.
Saturday night
Periods of snow. Low minus 11.
Sunday
Cloudy with 60 percent chance of flurries. Blowing snow. Windy. High minus 10.
Sunday night
Clear. Low minus 15.
Monday
A mix of sun and cloud with 30 percent chance of flurries. High minus 7.
Monday night
Cloudy periods with 30 percent chance of flurries. Low minus 8.
Tuesday
Cloudy with 30 percent chance of flurries. High minus 2.
Averages and extremes
Highest temperature(1972-2000)8.5 °C1988
Lowest temperature(1972-2000)-23.5 °C1994
Average high-0.6 °C 
Average low-7.8 °C 
Average-4.2 °C 
Greatest rainfall(1972-2000)15.2 mm1996
Greatest snowfall(1972-2000)4.2 cm1994
Greatest precipitation(1972-2000)15.2 mm1996
Most snow on the ground(1972-2000)63.0 cm1999
Monthly frequency of precipitation53.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EST)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
Wind
Chill
16 January 2019
17:00 -5 A few clouds (0%)  A few clouds Nil NW 20 gust 40 -12
18:00 -6 A few clouds (0%)  A few clouds Nil NW 20 gust 40 -13
19:00 -7 A few clouds (0%)  A few clouds Nil NW 20 gust 40 -14
20:00 -8 A few clouds (0%)  A few clouds Nil NW 10 -13
21:00 -8 A few clouds (0%)  A few clouds Nil NW 10 -13
22:00 -9 A few clouds (0%)  A few clouds Nil NW 10 -14
23:00 -9 A few clouds (0%)  A few clouds Nil NW 10 -14
17 January 2019
00:00 -10 A few clouds (0%)  A few clouds Nil NW 10 -15
01:00 -10 A few clouds (0%)  A few clouds Nil NW 10 -15
02:00 -10 A few clouds (0%)  A few clouds Nil VR 5 -13
03:00 -10 A few clouds (0%)  A few clouds Nil VR 5 -13
04:00 -10 A few clouds (0%)  A few clouds Nil VR 5 -13
05:00 -10 A few clouds (0%)  A few clouds Nil VR 5 -13
06:00 -11 Partly cloudy (10%)  Partly cloudy Low VR 5 -14
07:00 -11 Partly cloudy (10%)  Partly cloudy Low VR 5 -14
08:00 -10 A mix of sun and cloud (10%)  A mix of sun and cloud Low VR 5 -13
09:00 -9 A mix of sun and cloud (10%)  A mix of sun and cloud Low VR 5 -12
10:00 -8 A mix of sun and cloud (10%)  A mix of sun and cloud Low VR 5 -11
11:00 -7 A mix of sun and cloud (10%)  A mix of sun and cloud Low VR 5 -10
12:00 -6 A mix of sun and cloud (10%)  A mix of sun and cloud Low VR 5 -8
13:00 -5 A mix of sun and cloud (10%)  A mix of sun and cloud Low E 10 -9
14:00 -5 Cloudy (10%)  Cloudy Low E 10 -9
15:00 -4 Cloudy (10%)  Cloudy Low E 10 -8
16:00 -4 Cloudy (10%)  Cloudy Low E 10 -8
 
† 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