Hourly Forecast - Nottawa
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 20 to 40 mm. Locally higher amounts are possible if thunderstorms repeatedly impact the same area. When: This evening through Thursday morning. Additional information: Rain will advance northeastward this evening. With thunderstorms expected, rainfall amounts may exceed 50 mm over some areas. Rain will end from west to east 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.
- Barrie - Collingwood - Hillsdale
Regional ATOM| Date/Time (EDT) | Temp. (°C) | Weather Conditions | Likelihood of precip (%) | UV index | Wind (km/h) |
|---|---|---|---|---|---|
| 3 April 2025 | |||||
| 05:00 | 8 |  A few showers | 80 | * | S 30 gusts 50 |
| 06:00 | 9 | A few showers | 80 | * | S 30 gusts 50 |
| 07:00 | 11 | A few showers | 80 | * | S 30 gusts 50 |
| 08:00 | 12 | A few showers | 80 | * | S 30 gusts 50 |
| 09:00 | 14 |  Mainly cloudy | 20 | 2 | SW 30 gusts 50 |
| 10:00 | 15 |  A mix of sun and cloud | 20 | 4 | SW 30 gusts 50 |
| 11:00 | 17 |  Mainly sunny | 20 | 5 | SW 30 gusts 50 |
| 12:00 | 17 | Mainly sunny | 0 | 6 | SW 30 gusts 50 |
| 13:00 | 18 | A mix of sun and cloud | 0 | 6 | SW 30 gusts 50 |
| 14:00 | 18 | Mainly cloudy | 0 | 4 | SW 30 gusts 50 |
| 15:00 | 17 | Mainly cloudy | 0 | 3 | SW 30 gusts 50 |
| 16:00 | 17 | Mainly cloudy | 0 | 1 | SW 30 gusts 50 |
| 17:00 | 16 | Mainly cloudy | 0 | 1 | SW 30 gusts 50 |
| 18:00 | 14 | Mainly cloudy | 0 | * | SW 30 gusts 50 |
| 19:00 | 12 |  Cloudy | 0 | * | SW 30 gusts 50 |
| 20:00 | 10 | Cloudy | 0 | * | SW 30 gusts 50 |
| 21:00 | 8 |  Mainly cloudy | 0 | * | NW 20 gusts 40 |
| 22:00 | 6 |  Partly cloudy | 0 | * | NW 20 gusts 40 |
| 23:00 | 4 | Partly cloudy | 0 | * | NW 20 gusts 40 |
| 4 April 2025 | |||||
| 00:00 | 3 | Mainly cloudy | 0 | * | NW 20 gusts 40 |
| 01:00 | 2 | Cloudy | 0 | * | NW 20 gusts 40 |
| 02:00 | 1 | Mainly cloudy | 0 | * | NW 10 |
| 03:00 | 1 | Partly cloudy | 0 | * | NW 10 |
| 04:00 | 0 | Partly cloudy | 0 | * | NW 10 |
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