Observed at: St. Catharines / Niagara District Airport
Date: Monday November 29, 2021 at 19:00 EST
Mostly Cloudy
Mostly Cloudy
Temp.: 0.4 °C
Wind: SW 10 km/h
Humidity: 85 %
Dew point: -1.9 °C
Pressure: 101.6 kPa
Tendency: falling
Visibility: 24.1 km
Sunrise: 07:27
Sunset: 16:44
Normals:
Max 5°C Min -2°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Tuesday
Periods of snow mixed with rain
Periods of snow mixed with rain
Max: 4°C
Wednesday
Chance of showers (60%)
Chance of showers
Max: 4°C
Thursday
Chance of showers (70%)
Chance of showers
Max: 8°C
Friday
Chance of showers (60%)
Chance of showers
Max: 4°C
Saturday
Cloudy
Cloudy
Max: 2°C
Sunday
Chance of flurries or rain showers (60%)
Chance of flurries or rain showers
Max: 2°C
Monday night
Periods of snow
Periods of snow
Min: -2°C
Tuesday night
Mainly cloudy
Mainly cloudy
Min: 1°C
Wednesday night
Chance of showers (70%)
Chance of showers
Min: 4°C
Thursday night
Chance of showers (60%)
Chance of showers
Min: 2°C
Friday night
Chance of showers (60%)
Chance of showers
Min: 1°C
Saturday night
Cloudy
Cloudy
Min: 0°C

Forecast

St. Catharines, ON (Issued: Monday November 29, 2021 at 18:40 EST)

Tonight
Mainly cloudy. Periods of snow beginning overnight. Wind west 20 km/h becoming light this evening. Low minus 2. Wind chill minus 4 overnight.
Tuesday
Periods of snow becoming mixed with rain in the morning and ending near noon then cloudy with 30 percent chance of rain showers. Local snowfall amount 2 cm. Wind becoming west 20 km/h late in the afternoon. High plus 4. UV index 1 or low.
Tuesday night
Cloudy. Becoming partly cloudy near midnight. Wind west 20 km/h gusting to 40 increasing to 40 gusting to 60 near midnight then diminishing to 20 gusting to 40. Low plus 1.
Wednesday
Cloudy with 60 percent chance of showers. High plus 4.
Wednesday night
Cloudy with 70 percent chance of showers. Windy. Low plus 4.
Thursday
Cloudy with 70 percent chance of showers. Windy. High 8.
Thursday night
Cloudy with 60 percent chance of showers. Low plus 2.
Friday
Cloudy with 60 percent chance of showers. High plus 4.
Friday night
Cloudy with 60 percent chance of showers. Low plus 1.
Saturday
Cloudy. High plus 2.
Saturday night
Cloudy. Low zero.
Sunday
Cloudy with 60 percent chance of flurries or rain showers. High plus 2.
Averages and extremes
Highest temperature(1971-2000)10.9 °C1998
Lowest temperature(1971-2000)-9.4 °C1976
Average high5.4 °C 
Average low-1.5 °C 
Average2.0 °C 
Greatest rainfall(1971-2000)27.6 mm1987
Greatest snowfall(1971-2000)6.6 cm1983
Greatest precipitation(1971-2000)27.6 mm1987
Most snow on the ground(1971-2000)9.0 cm1996
Monthly frequency of precipitation47.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EST)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
Wind
Chill
29 November 2021
20:00 0 Partly cloudy (10%)  Partly cloudy Low SW 10
21:00 0 A few clouds (10%)  A few clouds Low SW 10
22:00 -1 A few clouds (10%)  A few clouds Low SW 10 -4
23:00 -1 Partly cloudy (10%)  Partly cloudy Low VR 5 -3
30 November 2021
00:00 -2 Mainly cloudy (10%)  Mainly cloudy Low VR 5 -3
01:00 -2 Cloudy (10%)  Cloudy Low VR 5 -4
02:00 -1 Cloudy (10%)  Cloudy Low VR 5 -3
03:00 -1 Periods of snow (80%)  Periods of snow High VR 5 -2
04:00 0 Periods of snow (80%)  Periods of snow High VR 5
05:00 0 Periods of snow (80%)  Periods of snow High SW 10
06:00 1 Periods of snow (80%)  Periods of snow High VR 5
07:00 1 Periods of snow (80%)  Periods of snow High VR 5
08:00 2 Periods of snow (80%)  Periods of snow High VR 5
09:00 2 Periods of snow mixed with rain (80%)  Periods of snow mixed with rain High VR 5
10:00 3 Periods of snow mixed with rain (80%)  Periods of snow mixed with rain High VR 5
11:00 3 Periods of snow mixed with rain (80%)  Periods of snow mixed with rain High VR 5
12:00 4 Chance of showers (30%)  Chance of showers Low VR 5
13:00 4 Chance of showers (30%)  Chance of showers Low VR 5
14:00 4 Chance of showers (30%)  Chance of showers Low SW 10
15:00 4 Chance of showers (30%)  Chance of showers Low SW 10
16:00 4 Cloudy (20%)  Cloudy Low SW 10
17:00 4 Cloudy (20%)  Cloudy Low W 20
18:00 3 Cloudy (20%)  Cloudy Low W 20 gust 40
19:00 3 Cloudy (20%)  Cloudy Low SW 20 gust 40
 
† 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