 |
 Current St Catharines Weather Conditions |
Updated September 17th at 6:00 pm |
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| Mostly Cloudy |
| Temperature: | 21°C |
Dew Point: | 18°C |
| Barometer: | 101.7 kPa |
Wind: | N 14 Km/h |
| Humidity: | 83.0% |
Visibility: | 0 Km |
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| St Catharines Weather Forecast Summary |
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Today
Sep 17th
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Thursday
Sep 18th
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Friday
Sep 19th
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Saturday
Sep 20th
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Sunday
Sep 21st
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Cloudy |
Cloudy |
Mostly Sunny |
Sunny |
Mix of Cloud and Sun |
27°C
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28°C
17°C |
21°C
13°C |
23°C
12°C |
29°C
14°C |
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| St Catharines Detailed Weather Forecast |
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| Wednesday, September 17th, 2025 |
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Evening |
Temperature: 18°C |
| A mix of cloudy and clear skies. |
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| Thursday, September 18th, 2025 |
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Overnight |
Temperature: 17°C |
| Clear. |
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Morning |
Temperature: 26°C |
| Sunny. |
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Afternoon |
Temperature: 24°C |
| Cloudy. |
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Evening |
Temperature: 18°C |
| Clear. |
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| Friday, September 19th, 2025 |
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Overnight |
Temperature: 16°C |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 20°C |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 19°C |
| Sunny. |
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Evening |
Temperature: 14°C |
| Clear. |
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| Saturday, September 20th, 2025 |
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Overnight |
Temperature: 12°C |
| Clear. |
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Morning |
Temperature: 21°C |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 20°C |
| Sunny. Windy at times. |
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Evening |
Temperature: 14°C |
| Clear. Windy at times. |
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| Sunday, September 21st, 2025 |
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Overnight |
Temperature: 15°C |
| Clear. |
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Morning |
Temperature: 26°C |
| Mostly sunny. Slight chance of a thunderstorm. |
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Afternoon |
Temperature: 25°C |
| Sunny with cloudy periods with a chance of showers. Slight chance of a thunderstorm. |
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Evening |
Temperature: 20°C |
| A mix of cloudy and clear skies. Windy at times. |
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| Monday, September 22nd, 2025 |
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Overnight |
Temperature: 18°C |
| A mix of cloudy and clear skies with a chance of showers. Windy at times. |
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Morning |
Temperature: 25°C |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 22°C |
| Mostly sunny with showers likely. Slight chance of a thunderstorm. |
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Evening |
Temperature: 19°C |
| Cloudy. |
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| Tuesday, September 23rd, 2025 |
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Overnight |
Temperature: 19°C |
| Cloudy. |
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Morning |
Temperature: 23°C |
| Cloudy with a chance of showers. Windy at times. |
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Afternoon |
Temperature: 23°C |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 19°C |
| Cloudy with a few showers. |
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| Wednesday, September 24th, 2025 |
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Overnight |
Temperature: 19°C |
| Cloudy with a few showers. Slight chance of a thunderstorm. |
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Morning |
Temperature: 23°C |
| Sunny with cloudy periods with a chance of showers or thundershowers. Windy at times. |
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Afternoon |
Temperature: 22°C |
| Mostly sunny. Windy at times. |
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Evening |
Temperature: 18°C |
| Clear with cloudy periods with a chance of showers. |
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| Thursday, September 25th, 2025 |
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Overnight |
Temperature: 16°C |
| Cloudy. Windy at times. |
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Morning |
Temperature: 21°C |
| Cloudy. Windy at times. |
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Afternoon |
Temperature: 18°C |
| Sunny with cloudy periods. Windy at times. |
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Evening |
Temperature: 15°C |
| Clear. |
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