Observed at: St. Catharines / Niagara District Airport
Date: Monday December 10, 2018 at 20:00 EST
Cloudy
Cloudy
Temp.: 0.1 °C
Wind: SW 7 km/h
Humidity: 80 %
Dew point: -2.9 °C
Pressure: 102.1 kPa
Tendency:
Visibility: 16.1 km
Sunrise: 07:38
Sunset: 16:42
Normals:
Max 3°C Min -4°C
Yesterday
  Max: °C
  Min: °C
  Rainfall: mm

 Extended Forecast - Environment Canada
  Tuesday
A few flurries
A few flurries
Max: -1°C
Wednesday
Sunny
Sunny
Max: 1°C
Thursday
Chance of flurries or rain showers (30%)
Chance of flurries or rain showers
Max: 4°C
Friday
Chance of rain (60%)
Chance of rain
Max: 7°C
Saturday
Chance of showers (40%)
Chance of showers
Max: 4°C
Sunday
Cloudy
Cloudy
Max: 3°C
Monday night
Chance of flurries (40%)
Chance of flurries
Min: -3°C
Tuesday night
Chance of flurries (40%)
Chance of flurries
Min: -3°C
Wednesday night
Chance of flurries (30%)
Chance of flurries
Min: -1°C
Thursday night
Chance of flurries or rain showers (30%)
Chance of flurries or rain showers
Min: 3°C
Friday night
Chance of rain (60%)
Chance of rain
Min: 4°C
Saturday night
Chance of rain showers or flurries (40%)
Chance of rain showers or flurries
Min: 1°C

Forecast

St. Catharines, ON (Issued: Monday December 10, 2018 at 15:30 EST)

Tonight
Mainly cloudy. 40 percent chance of flurries with risk of freezing drizzle. Wind becoming southwest 20 km/h this evening. Low minus 3. Wind chill near minus 9.
Tuesday
Flurries. Risk of freezing drizzle early in the morning. Wind southwest 20 km/h gusting to 40. High minus 1. Wind chill near minus 8. UV index 1 or low.
Tuesday night
A few flurries ending in the evening then partly cloudy with 40 percent chance of flurries. Wind west 20 km/h becoming light after midnight. Low minus 3. Wind chill near minus 7.
Wednesday
Sunny. High plus 1.
Wednesday night
Cloudy with 30 percent chance of flurries. Low minus 1.
Thursday
Cloudy with 30 percent chance of flurries or rain showers. High plus 4.
Thursday night
Cloudy with 30 percent chance of flurries or rain showers. Low plus 3.
Friday
Cloudy with 60 percent chance of rain. High 7.
Friday night
Cloudy with 60 percent chance of rain. Low plus 4.
Saturday
Cloudy with 40 percent chance of showers. High plus 4.
Saturday night
Cloudy with 40 percent chance of rain showers or flurries. Low plus 1.
Sunday
Cloudy. High plus 3.
Averages and extremes
Highest temperature(1971-2000)16.1 °C1971
Lowest temperature(1971-2000)-14.0 °C1977
Average high3.2 °C 
Average low-3.6 °C 
Average-0.2 °C 
Greatest rainfall(1971-2000)8.4 mm1999
Greatest snowfall(1971-2000)19.4 cm1992
Greatest precipitation(1971-2000)19.0 mm1992
Most snow on the ground(1971-2000)13.0 cm1977
Monthly frequency of precipitation49.0 % 

24 Hour Forecast - St. Catharines, ON

Date/Time
(EST)
Temp.
(°C)

Weather Conditions

LOP †
Wind
(km/h)
Wind
Chill
10 December 2018
21:00 -1 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -7
22:00 -1 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -7
23:00 -1 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -7
11 December 2018
00:00 -2 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -7
01:00 -2 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -8
02:00 -2 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -8
03:00 -3 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -9
04:00 -3 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -9
05:00 -3 Chance of flurries. Risk of freezing drizzle (40%)  Chance of flurries. Risk of freezing drizzle Low SW 20 -9
06:00 -2 A few flurries. Risk of freezing drizzle (100%)  A few flurries. Risk of freezing drizzle High SW 20 gust 40 -8
07:00 -2 A few flurries. Risk of freezing drizzle (100%)  A few flurries. Risk of freezing drizzle High SW 20 gust 40 -8
08:00 -2 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
09:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
10:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
11:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
12:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
13:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
14:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
15:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
16:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
17:00 -1 A few flurries (100%)  A few flurries High SW 20 gust 40 -7
18:00 -1 A few flurries (100%)  A few flurries High W 20 -7
19:00 -1 A few flurries (100%)  A few flurries High W 20 -7
20:00 -1 A few flurries (100%)  A few flurries High W 20 -7
 
† 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