Coimbra weather by month
Coimbra runs from about 10°C in December to 22°C in July, with October the wettest month at 225 mm.
warmest month
July
22°C
coolest month
December
10°C
wettest month
October
225 mm
worst air month
August
12 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 12°C | 154 mm | 189 h | 11 |
| February | 13°C | 168 mm | 216 h | 11 |
| March | 13°C | 203 mm | 257 h | 12 |
| April | 16°C | 103 mm | 335 h | 11 |
| May | 16°C | 44 mm | 365 h | 10 |
| June | 19°C | 92 mm | 328 h | 9 |
| July | 22°C | 22 mm | 392 h | 9 |
| August | 22°C | 1 mm | 364 h | 12 |
| September | 19°C | 33 mm | 305 h | 8 |
| October | 17°C | 225 mm | 217 h | 9 |
| November | 15°C | 70 mm | 214 h | 10 |
| December | 10°C | 12 mm | 259 h | 12 |
About 3,441 hours of sun a year. Roughly 111 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.