Halifax weather by month
Halifax runs from about -2°C in January to 20°C in July, with March the wettest month at 190 mm.
warmest month
July
20°C
coolest month
January
-2°C
wettest month
March
190 mm
worst air month
August
9 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -2°C | 113 mm | 158 h | 4 |
| February | -2°C | 170 mm | 167 h | 5 |
| March | 3°C | 190 mm | 152 h | 7 |
| April | 5°C | 92 mm | 277 h | 6 |
| May | 10°C | 44 mm | 264 h | 6 |
| June | 16°C | 110 mm | 287 h | 5 |
| July | 20°C | 79 mm | 256 h | 8 |
| August | 19°C | 111 mm | 296 h | 9 |
| September | 16°C | 94 mm | 283 h | 6 |
| October | 11°C | 75 mm | 247 h | 4 |
| November | 6°C | 118 mm | 109 h | 3 |
| December | 0°C | 114 mm | 137 h | 3 |
About 2,633 hours of sun a year. Roughly 130 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.