 |
 Current St Catharines Weather Conditions |
Updated May 14th at 8:00 am |
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| light rain mist |
| Temperature: | 6°C |
Dew Point: | 5°C |
| Barometer: | 100.9 kPa |
Wind: | N 34 Km/h |
| Humidity: | 93.3% |
Visibility: | 0 Km |
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| St Catharines Weather Forecast Summary |
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Today
May 14th
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Friday
May 15th
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Saturday
May 16th
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Sunday
May 17th
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Monday
May 18th
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Mix of Cloud and Sun |
Mostly Sunny |
Mostly Cloudy with Showers |
Mix of Sun and Cloud |
Mix of Sun and Cloud |
7°C
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15°C
5°C |
18°C
8°C |
21°C
15°C |
27°C
15°C |
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| St Catharines Detailed Weather Forecast |
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| Thursday, May 14th, 2026 |
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Morning |
Temperature: 6°C |
| A mix of cloud and sun. |
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Afternoon |
Temperature: 7°C |
| A mix of cloud and sun with a slight chance of showers. Windy at times. |
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Evening |
Temperature: 7°C |
| A mix of cloudy and clear skies with a slight chance of showers. |
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| Friday, May 15th, 2026 |
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Overnight |
Temperature: 6°C |
| Clear with cloudy periods. |
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Morning |
Temperature: 11°C |
| Mostly sunny. |
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Afternoon |
Temperature: 15°C |
| A mix of sun and cloud. |
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Evening |
Temperature: 10°C |
| Mostly clear. |
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| Saturday, May 16th, 2026 |
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Overnight |
Temperature: 9°C |
| Clear. |
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Morning |
Temperature: 15°C |
| Sunny with cloudy periods. Windy at times. |
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Afternoon |
Temperature: 15°C |
| Cloudy with showers. Windy at times. |
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Evening |
Temperature: 14°C |
| A mix of cloudy and clear skies with a few showers. |
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| Sunday, May 17th, 2026 |
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Overnight |
Temperature: 15°C |
| A mix of cloudy and clear skies. Windy at times. |
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Morning |
Temperature: 15°C |
| A mix of cloud and sun. |
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Afternoon |
Temperature: 19°C |
| Sunny with cloudy periods. |
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Evening |
Temperature: 17°C |
| Mostly clear. |
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| Monday, May 18th, 2026 |
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Overnight |
Temperature: 16°C |
| Mostly cloudy with a chance of showers. |
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Morning |
Temperature: 20°C |
| A mix of cloud and sun with a slight chance of showers or thundershowers. Windy at times. |
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Afternoon |
Temperature: 27°C |
| Sunny. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 21°C |
| Clear. Slight chance of a thunderstorm. |
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| Tuesday, May 19th, 2026 |
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Overnight |
Temperature: 20°C |
| Clear with cloudy periods. Windy at times. |
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Morning |
Temperature: 22°C |
| Sunny with cloudy periods with a chance of showers. Windy. |
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Afternoon |
Temperature: 22°C |
| Sunny with cloudy periods with a chance of showers. Windy. |
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Evening |
Temperature: 17°C |
| A mix of cloudy and clear skies with a chance of showers. |
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| Wednesday, May 20th, 2026 |
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Overnight |
Temperature: 12°C |
| Clear with cloudy periods. |
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Morning |
Temperature: 15°C |
| Mostly sunny. |
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Afternoon |
Temperature: 19°C |
| Sunny. |
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Evening |
Temperature: 13°C |
| Mostly clear. |
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| Thursday, May 21st, 2026 |
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Overnight |
Temperature: 9°C |
| Mostly clear. |
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Morning |
Temperature: 12°C |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 12°C |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 9°C |
| Cloudy with a chance of showers. Windy at times. |
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| Friday, May 22nd, 2026 |
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Overnight |
Temperature: 8°C |
| Mostly cloudy with a chance of showers. |
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Morning |
Temperature: 9°C |
| A mix of cloud and sun with a chance of showers. |
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Afternoon |
Temperature: 10°C |
| A mix of cloud and sun with a chance of showers. |
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Evening |
Temperature: 11°C |
| A mix of cloudy and clear skies. |
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