St. Catharines Weather Conditions
Current Temperature Level
St. Catharines Weather Conditions
Current Temperature Level
Feels Like 18°C
Chances of Rain12%
17°12%4 AM17°12%5 AM17°11%6 AM16°12%7 AM
16°13%8 AM18°10%9 AM20°8%10 AM22°4%11 AM26°2%12 PM27°1%1 PM28°2%2 PM29°2%3 PM28°2%4 PM28°2%5 PM28°1%6 PM24°3%7 PM24°4%8 PM22°5%9 PM20°6%10 PM20°6%11 PM20°6%12 AM19°6%1 AM19°5%2 AM19°6%Skies are likely to remain clear overnight.
Last Updated: 2026-08-04 03:30 (Local Time)
234°SW
Direction
5.4km/h
Wind Speed
Gust Speed
3.1m/s
Precipitation
Precipitation
0mm
Pressure
1017mb
UV Index
0Low
Today
22
°C
69%Wednesday
22
°C74%Thursday
24
°C78%Friday
21
°C90%Saturday
23
°C86%Sunday
25
°C78%Monday
22
°C73%Tuesday
18
°C71%Wednesday
22
°C74%Thursday
22
°C73%Sunny
Clear Sky with temperature at 22 °C and humidity will be at 69% with 9 km/h winds.29°C / 16°C
Humi.69 %
Prec.0 mm
Sunrise
06:10 AM14hrs 25min
Sunset
08:35 PMTime
Condition
Temp
Humidity
UV
Wind Speed & Dir.
12 AM
Clear
19 °C
81 %
0
6.5 kmph / W
Clear
Feels 19 °C
Cover 0 %
Visibility 10 km
1 AM
Clear
18 °C
83 %
0
5.8 kmph / W
ClearFeels 19 °C
Cover 0 %
Visibility 10 km
2 AM
Clear
18 °C
87 %
0
5 kmph / W
ClearFeels 18 °C
Cover 0 %
Visibility 10 km
3 AM
Clear
17 °C
88 %
0
5.4 kmph / SW
ClearFeels 18 °C
Cover 0 %
Visibility 10 km
4 AM
Clear
17 °C
87 %
0
7.9 kmph / SSW
ClearFeels 17 °C
Cover 3 %
Visibility 10 km
5 AM
Clear
17 °C
84 %
0
9 kmph / SSW
ClearFeels 16 °C
Cover 0 %
Visibility 10 km
6 AM
Clear
16 °C
87 %
0
8.3 kmph / SSW
ClearFeels 16 °C
Cover 3 %
Visibility 10 km
7 AM
Sunny
16 °C
90 %
0.2
7.2 kmph / SW
SunnyFeels 16 °C
Cover 0 %
Visibility 10 km
8 AM
Sunny
18 °C
83 %
0.8
6.8 kmph / SSW
SunnyFeels 19 °C
Cover 0 %
Visibility 10 km
9 AM
Sunny
20 °C
76 %
2
7.2 kmph / SSW
SunnyFeels 20 °C
Cover 0 %
Visibility 10 km
10 AM
Sunny
22 °C
63 %
3.8
6.1 kmph / SSW
SunnyFeels 22 °C
Cover 0 %
Visibility 10 km
11 AM
Sunny
26 °C
51 %
5.8
3.2 kmph / SW
SunnyFeels 27 °C
Cover 0 %
Visibility 10 km
12 PM
Sunny
27 °C
48 %
7.5
2.2 kmph / NNW
SunnyFeels 27 °C
Cover 0 %
Visibility 10 km
1 PM
Sunny
28 °C
52 %
8.3
1.8 kmph / NNE
SunnyFeels 29 °C
Cover 0 %
Visibility 10 km
2 PM
Sunny
29 °C
52 %
8.1
1.4 kmph / ENE
SunnyFeels 30 °C
Cover 0 %
Visibility 10 km
3 PM
Sunny
28 °C
52 %
6.8
2.9 kmph / E
SunnyFeels 29 °C
Cover 0 %
Visibility 10 km
4 PM
Sunny
28 °C
49 %
4.9
3.2 kmph / ESE
SunnyFeels 28 °C
Cover 0 %
Visibility 10 km
5 PM
Sunny
28 °C
39 %
3
5.4 kmph / SE
SunnyFeels 28 °C
Cover 0 %
Visibility 10 km
6 PM
Sunny
24 °C
55 %
1.4
5.4 kmph / SE
SunnyFeels 25 °C
Cover 0 %
Visibility 10 km
7 PM
Sunny
24 °C
62 %
0.5
3.2 kmph / ESE
SunnyFeels 25 °C
Cover 0 %
Visibility 10 km
8 PM
Sunny
22 °C
68 %
0
3.2 kmph / E
SunnyFeels 23 °C
Cover 0 %
Visibility 10 km
9 PM
Clear
20 °C
71 %
0
5 kmph / E
ClearFeels 21 °C
Cover 0 %
Visibility 10 km
10 PM
Clear
20 °C
72 %
0
7.2 kmph / ESE
ClearFeels 20 °C
Cover 0 %
Visibility 10 km
11 PM
Clear
20 °C
70 %
0
6.5 kmph / SSE
ClearFeels 20 °C
Cover 3 %
Visibility 10 km
31°19°28°19°28°17°29°16°25°18°29°21°24°20°26°20°29°21°25°19°21°17°26°19°25°19°
25°19°25°19°26°19°26°19°25°19°
25°18°25°19°25°19°24°18°24°18°25°18°25°19°24°18°24°18°24°18°25°18°24°18°24°18°AugustWeather Overview
No. of days:
Sunny
9
Cloudy
0
Rainy
22
Snowy
0
The monthly weather averages in St. Catharines consist of 9 sunny days, 0 cloudy days, 22 rainy days, and 0 snowy days.
St. Catharines's Locations Weather Conditions
Canada's Hottest Cities - August 2026
1.
Pictou, Nova Scotia
24 °C
Patchy rain nearby
86%
0
30.2 kmph / SSW
2.
New Glasgow, Nova Scotia
24 °C
Patchy rain nearby
86%
0
30.2 kmph / SSW
3.
Aylesford, Nova Scotia
22 °C
Overcast
84%
0
25.9 kmph / SSW
4.
Kentville, Nova Scotia
22 °C
Overcast
84%
0
25.9 kmph / SSW
5.
Saint Peters Bay, Prince Edward Island
22 °C
Clear
83%
0
36.4 kmph / S
6.
Charlottetown, Prince Edward Island
22 °C
Clear
86%
0
37.4 kmph / S
7.
Port Hawkesbury, Nova Scotia
21 °C
Patchy rain nearby
93%
0
24.1 kmph / S
8.
Antigonish, Nova Scotia
21 °C
Patchy rain nearby
93%
0
24.1 kmph / S
9.
Cape Breton, Nova Scotia
21 °C
Partly Cloudy
92%
0
23.4 kmph / SSW
10.
Sydney, Nova Scotia
21 °C
Partly Cloudy
92%
0
23.4 kmph / SSW
Last Updated: 04 Aug 2026, 08:01 AM
City Weather RankingsFAQs About St. Catharines Weather Conditions
1. What is the current temperature in St. Catharines today - 04 August 2026?
1. What is the current temperature in St. Catharines today - 04 August 2026?
The current temperature in St. Catharines is 17°C, with a feels-like temperature of 18°C. Today's forecast shows a high of 29°C and a low of 16°C, giving a 13 degree swing through the day as of 03:30 AM 04 August 2026.
2. What are the current weather parameters in St. Catharines today?
2. What are the current weather parameters in St. Catharines today?
Here is a complete overview of St. Catharines's current weather conditions as of 03:30 AM 04 August 2026: Condition : Clear Temperature : 17°C Cool (Feels like 18°C) Humidity : 88% Wind Speed : 5.4 km/h from SW (234 degrees), Gust 3.1 m/s UV Index : 0 (Low Air Pressure : 1017 mb Cloud Cover : 0% Visibility : 10 km Precipitation : 0 mm (5% chance of rain)
3. What is the 10-day weather forecast for St. Catharines from 03:30 AM 04 August 2026?
3. What is the 10-day weather forecast for St. Catharines from 03:30 AM 04 August 2026?
From 03:30 AM 04 August 2026, St. Catharines's 10-day forecast shows this trend: Today (Aug. 4) : Temp. 22°C, Hum. 69% and Sunny condition. Wednesday (Aug. 5) : Temp. 22°C, Hum. 74% and Sunny condition. Thursday (Aug. 6) : Temp. 24°C, Hum. 78% and Sunny condition. Friday (Aug. 7) : Temp. 21°C, Hum. 90% and Patchy rain nearby condition. Saturday (Aug. 8) : Temp. 23°C, Hum. 86% and Sunny condition. Sunday (Aug. 9) : Temp. 25°C, Hum. 78% and Sunny condition. Monday (Aug. 10) : Temp. 22°C, Hum. 73% and Sunny condition. Tuesday (Aug. 11) : Temp. 18°C, Hum. 71% and Sunny condition. Wednesday (Aug. 12) : Temp. 22°C, Hum. 74% and Rain Showers condition. Thursday (Aug. 13) : Temp. 22°C, Hum. 73% and Rain Showers condition.
4. Will it rain in St. Catharines today?
4. Will it rain in St. Catharines today?
As of 03:30 AM 04 August 2026, there is a 12% chance of rainfall in St. Catharines later today around 2026-08-04 04:00. Current precipitation is 0 mm. Residents are advised to carry an umbrella before heading out.
5. What is the monthly weather forecast for St. Catharines in August 2026?
5. What is the monthly weather forecast for St. Catharines in August 2026?
August 2026 in St. Catharines is forecast to have 9 sunny days, 22 rainy days, 0 cloudy days, and 0 snowy days. Temperatures for the month range from lows around 16°C to highs of 31°C.
6. How does the weather in St. Catharines affect air quality?
6. How does the weather in St. Catharines affect air quality?
Weather directly impacts air quality in St. Catharines. Calm winds, high humidity, fog, and high pressure trap pollutants near the ground, worsening AQI. Strong winds, rainfall, and low pressure help disperse them. Rising temperatures and UV levels intensify ozone and smog formation, while poor visibility signals elevated particulate matter. Monitoring weather alongside AQI gives the clearest picture of outdoor safety.
