Hsinchu weather by month
Hsinchu runs from about 16°C in January to 29°C in July, with September the wettest month at 282 mm.
warmest month
July
29°C
coolest month
January
16°C
wettest month
September
282 mm
worst air month
September
29 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 16°C | 51 mm | 240 h | 18 |
| February | 17°C | 96 mm | 233 h | 23 |
| March | 19°C | 101 mm | 248 h | 21 |
| April | 24°C | 256 mm | 271 h | 24 |
| May | 25°C | 166 mm | 272 h | 19 |
| June | 28°C | 227 mm | 284 h | 16 |
| July | 29°C | 208 mm | 351 h | 19 |
| August | 28°C | 189 mm | 335 h | 26 |
| September | 29°C | 282 mm | 309 h | 29 |
| October | 26°C | 225 mm | 263 h | 22 |
| November | 22°C | 102 mm | 240 h | 17 |
| December | 17°C | 26 mm | 227 h | 16 |
About 3,273 hours of sun a year. Roughly 195 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 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.