Observed at: St. Catharines / Niagara District Airport
Date: Thursday January 21, 2021 at 11:00 EST
Mostly Cloudy
Mostly Cloudy
Temp.: 2.8 °C
Wind: SW 29 km/h
Humidity: 67 %
Dew point: -2.8 °C
Pressure: 100.2 kPa
Tendency: falling
Visibility: 24.1 km
Sunrise: 07:42
Sunset: 17:14
Normals:
Max -1°C Min -8°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
Thursday
Chance of flurries (40%)
Chance of flurries
Max: 3°C
Friday
Chance of flurries (30%)
Chance of flurries
Max: 1°C *
Saturday
Cloudy
Cloudy
Max: -5°C
Sunday
Cloudy
Cloudy
Max: -4°C
Monday
A mix of sun and cloud
A mix of sun and cloud
Max: -3°C
Tuesday
A mix of sun and cloud
A mix of sun and cloud
Max: -3°C
Wednesday
A mix of sun and cloud
A mix of sun and cloud
Max: -4°C
Thursday night
Chance of flurries (40%)
Chance of flurries
Min: 0°C
Friday night
Chance of flurries (40%)
Chance of flurries
Min: -7°C
Saturday night
Cloudy periods
Cloudy periods
Min: -7°C
Sunday night
Cloudy
Cloudy
Min: -5°C
Monday night
Cloudy periods
Cloudy periods
Min: -5°C
Tuesday night
Cloudy periods
Cloudy periods
Min: -6°C
 

* - Denotes an abnormal temperature trend.

Forecast

St. Catharines, ON (Issued: Thursday January 21, 2021 at 11:00 EST)

Today
Cloudy with 40 percent chance of flurries. Wind west 30 km/h gusting to 50. High plus 3. UV index 1 or low.
Tonight
Cloudy with 40 percent chance of flurries. Wind west 30 km/h gusting to 50. Low zero.
Friday
Cloudy. 30 percent chance of flurries in the morning. A few flurries beginning near noon. Local blowing snow in the afternoon. Local amount 2 cm. Wind northwest 30 km/h gusting to 50. Temperature falling to minus 3 in the afternoon. Wind chill minus 9 in the afternoon. UV index 1 or low.
Friday night
Cloudy with 40 percent chance of flurries. Low minus 7.
Saturday
Cloudy. High minus 5.
Saturday night
Cloudy periods. Low minus 7.
Sunday
Cloudy. High minus 4.
Sunday night
Cloudy. Low minus 5.
Monday
A mix of sun and cloud. High minus 3.
Monday night
Cloudy periods. Low minus 5.
Tuesday
A mix of sun and cloud. High minus 3.
Tuesday night
Cloudy periods. Low minus 6.
Wednesday
A mix of sun and cloud. High minus 4.
Averages and extremes
Highest temperature(1972-2000)9.4 °C1974
Lowest temperature(1972-2000)-20.4 °C1984
Average high-0.8 °C 
Average low-8.0 °C 
Average-4.4 °C 
Greatest rainfall(1972-2000)7.0 mm1993
Greatest snowfall(1972-2000)5.6 cm1979
Greatest precipitation(1972-2000)7.2 mm1995
Most snow on the ground(1972-2000)31.0 cm1978
Monthly frequency of precipitation53.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EST)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
21 January 2021
12:00 3 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
13:00 3 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
14:00 3 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
15:00 3 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
16:00 3 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
17:00 3 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
18:00 2 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
19:00 2 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
20:00 2 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
21:00 1 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
22:00 1 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
23:00 1 Chance of flurries (40%)  Chance of flurries Low W 30 gust 50
22 January 2021
00:00 1 Chance of flurries (40%)  Chance of flurries Low W 20 gust 40
01:00 1 Chance of flurries (40%)  Chance of flurries Low W 20 gust 40
02:00 1 Chance of flurries (40%)  Chance of flurries Low W 20 gust 40
03:00 1 Chance of flurries (40%)  Chance of flurries Low W 20 gust 40
04:00 1 Chance of flurries (40%)  Chance of flurries Low W 20 gust 40
05:00 1 Chance of flurries (40%)  Chance of flurries Low W 20 gust 40
06:00 0 Chance of flurries (30%)  Chance of flurries Low W 20 gust 40
07:00 0 Chance of flurries (30%)  Chance of flurries Low W 20 gust 40
08:00 0 Chance of flurries (30%)  Chance of flurries Low W 20 gust 40
09:00 1 Chance of flurries (30%)  Chance of flurries Low W 20 gust 40
10:00 1 Chance of flurries (30%)  Chance of flurries Low W 20 gust 40
11:00 1 Chance of flurries (30%)  Chance of flurries Low W 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%

Environment Canada