Toronto weather by month
Toronto runs from about -2°C in January to 22°C in July, with April the wettest month at 168 mm.
warmest month
July
22°C
coolest month
January
-2°C
wettest month
April
168 mm
worst air month
July
17 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -2°C | 107 mm | 97 h | 7 |
| February | 0°C | 20 mm | 227 h | 14 |
| March | 3°C | 63 mm | 232 h | 13 |
| April | 8°C | 168 mm | 242 h | 12 |
| May | 15°C | 80 mm | 359 h | 11 |
| June | 19°C | 84 mm | 327 h | 13 |
| July | 22°C | 87 mm | 390 h | 17 |
| August | 21°C | 69 mm | 337 h | 14 |
| September | 18°C | 76 mm | 305 h | 11 |
| October | 12°C | 68 mm | 256 h | 5 |
| November | 7°C | 41 mm | 141 h | 5 |
| December | 0°C | 86 mm | 106 h | 5 |
About 3,019 hours of sun a year. Roughly 96 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.