Whistler weather by month
Whistler runs from about -2°C in January to 19°C in July, with January the wettest month at 325 mm.
warmest month
July
19°C
coolest month
January
-2°C
wettest month
January
325 mm
worst air month
September
14 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -2°C | 325 mm | 75 h | 3 |
| February | -1°C | 148 mm | 160 h | 3 |
| March | 1°C | 147 mm | 218 h | 3 |
| April | 3°C | 117 mm | 268 h | 6 |
| May | 9°C | 123 mm | 322 h | 10 |
| June | 12°C | 134 mm | 345 h | 10 |
| July | 19°C | 9 mm | 443 h | 7 |
| August | 18°C | 97 mm | 364 h | 8 |
| September | 14°C | 90 mm | 262 h | 14 |
| October | 7°C | 244 mm | 156 h | 5 |
| November | 1°C | 234 mm | 71 h | 1 |
| December | 1°C | 284 mm | 86 h | 1 |
About 2,770 hours of sun a year. Roughly 192 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.