Hourly Forecast - Waterdown
2 WEATHER ALERTS
RAINFALL WARNING
Rain, heavy at times is expected. The ground, already near saturation, has little ability to absorb further rainfall. What: Rain, at times heavy. Total rainfall amounts of 30 to 50 mm. Locally higher amounts are possible if thunderstorms repeatedly impact the same area. When: Wednesday morning through early Thursday morning. Additional information: Rain begins Wednesday morning over extreme southwestern Ontario before reaching the Golden Horseshoe Wednesday afternoon. With thunderstorms expected, rainfall amounts may exceed 50 mm over some areas, particularly over southwestern Ontario. Rain will end from west to east overnight into early Thursday morning. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details. Localized flooding in low-lying areas is possible. Heavy downpours can cause flash floods and water pooling on roads. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
- City of Hamilton
Regional ATOMSPECIAL WEATHER STATEMENT
Brief period of freezing rain possible Wednesday. What: Brief period of freezing rain with minor ice accretion on some surfaces possible. Surfaces such as highways, roads, walkways and parking lots may become icy, slippery and hazardous. When: Wednesday morning to early Wednesday evening. Additional information: A brief period of freezing rain is possible before a transition to rain. For locations near Lake Ontario, temperatures will likely remain above the freezing mark. Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.
- City of Hamilton
Regional ATOM| Date/Time (EDT) | Temp. (°C) | Weather Conditions | Likelihood of precip (%) | UV index | Wind (km/h) | Wind Chill |
|---|---|---|---|---|---|---|
| 1 April 2025 | ||||||
| 18:00 | 3 |  Sunny | 0 | * | E 10 | * |
| 19:00 | 1 | Sunny | 0 | * | E 10 | * |
| 20:00 | 0 |  A few clouds | 0 | * | E 10 | * |
| 21:00 | 0 | A few clouds | 0 | * | E 10 | * |
| 22:00 | -1 | A few clouds | 0 | * | E 10 | -4 |
| 23:00 | -1 |  Partly cloudy | 0 | * | E 15 | -6 |
| 2 April 2025 | ||||||
| 00:00 | -1 | Partly cloudy | 0 | * | E 15 | -6 |
| 01:00 | -2 | A few clouds | 0 | * | E 15 | -6 |
| 02:00 | -2 | A few clouds | 0 | * | E 20 | -8 |
| 03:00 | -2 | A few clouds | 0 | * | E 20 | -7 |
| 04:00 | -1 | Partly cloudy | 0 | * | E 20 | -7 |
| 05:00 | -1 |  Mainly cloudy | 0 | * | E 20 gusts 40 | -7 |
| 06:00 | -1 |  Cloudy | 0 | * | E 20 | -6 |
| 07:00 | 0 | Cloudy | 0 | * | E 20 | * |
| 08:00 | 0 |  Chance of flurries | 40 | 1 | E 20 | * |
| 09:00 | 1 | Chance of flurries | 40 | 1 | E 40 gusts 60 | * |
| 10:00 | 1 |  Chance of flurries | 40 | 3 | E 40 gusts 60 | * |
| 11:00 | 2 | Chance of flurries | 40 | 4 | E 40 gusts 60 | * |
| 12:00 | 1 |  Rain. Risk of freezing rain | 80 | 2 | E 40 gusts 60 | * |
| 13:00 | 1 | Rain. Risk of freezing rain | 80 | 2 | E 40 gusts 60 | * |
| 14:00 | 0 | Rain. Risk of freezing rain | 80 | 1 | E 40 gusts 60 | * |
| 15:00 | 0 | Rain. Risk of freezing rain | 80 | 1 | E 40 gusts 60 | * |
| 16:00 | 1 | Rain. Risk of freezing rain | 80 | 1 | E 40 gusts 60 | * |
| 17:00 | 1 | Rain. Risk of freezing rain | 80 | * | E 40 gusts 60 | * |
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