| Mon May 20 | Tue May 21 | Wed May 22 | Thu May 23 | |
| Tmin 18-06 |
15°C | 17°C | 15°C | 13°C |
| Tmax 06-18 |
27°C | 24°C | 26°C | 17°C |
| morning 24-06 |
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| a.m. 06-12 |
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| p.m. 12-18 |
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| evening 18-24 |
| Nearby Forecast Locations - Niagara Falls | Distance |
| S. Catharines | 20.8 km |
| Buffalo | 25.6 km |
| Port Weller | 27.3 km |
| Forecast: Niagara Falls Region In the next few days, it's mostly cloudy. But thunderstorms are likely on Tuesday. It's getting cooler: From 23 degrees on Wednesday the daily highs drop to 15 degrees on Thursday. |