FOG ADVISORY IN EFFECT

Observed at: St. Catharines Airport
Date: Sunday January 21, 2018 at 23:00 EST
Temp.: 2.4 °C
Wind: E 5 km/h
Humidity: 98 %
Dew point: 2.1 °C
Pressure: 101.9 kPa
Tendency:
Sunrise: 07:43
Sunset: 17:14
Normals:
Max -1°C Min -8°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Monday
Periods of rain
Periods of rain
Max: 5°C
Tuesday
Chance of rain showers or flurries (60%)
Chance of rain showers or flurries
Max: 3°C
Wednesday
A mix of sun and cloud
A mix of sun and cloud
Max: -5°C
Thursday
A mix of sun and cloud
A mix of sun and cloud
Max: -6°C
Friday
A mix of sun and cloud
A mix of sun and cloud
Max: 2°C
Saturday
Chance of showers (40%)
Chance of showers
Max: 6°C
Sunday night
Periods of drizzle
Periods of drizzle
Min: 2°C
Monday night
Periods of rain
Periods of rain
Min: 7°C *
Tuesday night
Chance of flurries (40%)
Chance of flurries
Min: -5°C
Wednesday night
Cloudy periods
Cloudy periods
Min: -9°C
Thursday night
Cloudy periods
Cloudy periods
Min: -6°C
Friday night
Cloudy periods
Cloudy periods
Min: 2°C

* - Denotes an abnormal temperature trend.

Forecast

St. Catharines, ON (Issued: Sunday January 21, 2018 at 17:49 EST)

Tonight
Periods of drizzle. Fog patches. Low plus 2.
Monday
Periods of rain. Fog patches dissipating in the morning. Wind becoming northeast 20 km/h gusting to 40 in the morning. High plus 5.
Monday night
Periods of rain ending after midnight then mainly cloudy with 40 percent chance of showers. Risk of a thunderstorm late in the evening and after midnight. Wind south 20 km/h. Temperature rising to 8 by morning.
Tuesday
Cloudy with 60 percent chance of rain showers or flurries. Windy. High plus 3.
Tuesday night
Cloudy periods with 40 percent chance of flurries. Low minus 5.
Wednesday
A mix of sun and cloud. High minus 5.
Wednesday night
Cloudy periods. Low minus 9.
Thursday
A mix of sun and cloud. High minus 6.
Thursday night
Cloudy periods. Low minus 6.
Friday
A mix of sun and cloud. High plus 2.
Friday night
Cloudy periods. Low plus 2.
Saturday
Cloudy with 40 percent chance of showers. High 6.
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)
22 January 2018
00:00 2 Periods of drizzle (100%)  Periods of drizzle High VR 5
01:00 2 Periods of drizzle (100%)  Periods of drizzle High VR 5
02:00 2 Periods of drizzle (100%)  Periods of drizzle High VR 5
03:00 2 Periods of drizzle (100%)  Periods of drizzle High VR 5
04:00 2 Periods of drizzle (100%)  Periods of drizzle High VR 5
05:00 2 Periods of drizzle (100%)  Periods of drizzle High VR 5
06:00 3 Periods of rain (100%)  Periods of rain High VR 5
07:00 3 Periods of rain (100%)  Periods of rain High VR 5
08:00 3 Periods of rain (100%)  Periods of rain High VR 5
09:00 3 Periods of rain (100%)  Periods of rain High NE 20 gust 40
10:00 3 Periods of rain (100%)  Periods of rain High NE 20 gust 40
11:00 3 Periods of rain (100%)  Periods of rain High NE 20 gust 40
12:00 4 Periods of rain (100%)  Periods of rain High NE 20 gust 40
13:00 4 Periods of rain (100%)  Periods of rain High NE 20 gust 40
14:00 4 Periods of rain (100%)  Periods of rain High NE 20 gust 40
15:00 5 Periods of rain (100%)  Periods of rain High NE 20 gust 40
16:00 5 Periods of rain (100%)  Periods of rain High NE 20 gust 40
17:00 5 Periods of rain (100%)  Periods of rain High NE 20 gust 40
18:00 5 Periods of rain (100%)  Periods of rain High S 20
19:00 5 Periods of rain (100%)  Periods of rain High S 20
20:00 6 Periods of rain (100%)  Periods of rain High S 20
21:00 7 Periods of rain (100%)  Periods of rain High S 20
22:00 7 Periods of rain. Risk of thunderstorms (100%)  Periods of rain. Risk of thunderstorms High S 20
23:00 7 Periods of rain. Risk of thunderstorms (100%)  Periods of rain. Risk of thunderstorms High S 20
 
† 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