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 St Catharines Weather Forecast Summary |
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Today
Jul 28th
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Wednesday
Jul 29th
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Thursday
Jul 30th
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Friday
Jul 31st
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Saturday
Aug 1st
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Thundershowers |
Showers |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
24°C
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19°C
17°C |
26°C
18°C |
29°C
18°C |
29°C
20°C |
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| St Catharines Detailed Weather Forecast |
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| Tuesday, July 28th, 2026 |
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Overnight |
Temperature: 20°C |
| Cloudy with showers. Slight chance of a thunderstorm. Windy. |
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Morning |
Temperature: 19°C |
| Cloudy with showers. |
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Afternoon |
Temperature: 23°C |
| Mostly sunny with a chance of showers or thundershowers. Windy at times. |
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Evening |
Temperature: 20°C |
| A mix of clear and cloudy skies with a chance of showers. Slight chance of a thunderstorm. |
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| Wednesday, July 29th, 2026 |
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Overnight |
Temperature: 18°C |
| A mix of cloudy and clear skies with a slight chance of showers. Windy at times. |
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Morning |
Temperature: 17°C |
| Cloudy with showers likely. Windy at times. |
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Afternoon |
Temperature: 18°C |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 19°C |
| Cloudy with a chance of showers. Windy at times. |
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| Thursday, July 30th, 2026 |
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Overnight |
Temperature: 19°C |
| Cloudy with clear periods. |
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Morning |
Temperature: 21°C |
| Mostly sunny. |
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Afternoon |
Temperature: 26°C |
| Sunny. Slight chance of a thunderstorm. |
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Evening |
Temperature: 22°C |
| Clear. Slight chance of a thunderstorm. |
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| Friday, July 31st, 2026 |
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Overnight |
Temperature: 19°C |
| Clear. |
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Morning |
Temperature: 24°C |
| Sunny. |
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Afternoon |
Temperature: 29°C |
| Mostly sunny. |
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Evening |
Temperature: 23°C |
| Clear with cloudy periods. |
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| Saturday, August 1st, 2026 |
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Overnight |
Temperature: 20°C |
| Mostly clear. |
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Morning |
Temperature: 24°C |
| Mostly sunny. |
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Afternoon |
Temperature: 29°C |
| Sunny with cloudy periods. Chance of a thunderstorm. |
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Evening |
Temperature: 24°C |
| A mix of cloudy and clear skies with a slight chance of showers or thundershowers. |
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| Sunday, August 2nd, 2026 |
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Overnight |
Temperature: 20°C |
| Cloudy with a chance of showers. Slight chance of a thunderstorm. |
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Morning |
Temperature: 19°C |
| Cloudy with a few showers. |
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Afternoon |
Temperature: 20°C |
| Mostly cloudy with a few showers. |
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Evening |
Temperature: 18°C |
| Mostly cloudy with a slight chance of showers. |
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| Monday, August 3rd, 2026 |
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Overnight |
Temperature: 17°C |
| Clear with cloudy periods. |
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Morning |
Temperature: 20°C |
| Mostly sunny. |
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Afternoon |
Temperature: 26°C |
| Sunny. |
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Evening |
Temperature: 21°C |
| Mostly clear. |
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| Tuesday, August 4th, 2026 |
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Overnight |
Temperature: 18°C |
| Clear. |
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Morning |
Temperature: 23°C |
| Sunny. |
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Afternoon |
Temperature: 28°C |
| Sunny. |
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Evening |
Temperature: 22°C |
| Clear. |
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