June and September: highs of 26.1°C and 26.6°C, little rain

Mid-June, the Santo António parties fill Alfama and Graça

September edges it: 19.5 days above 25°C and a warmer sea

November is the wettest month at 133.9 mm, wetter than January

July is near rainless at 2.6 mm; August heat is felt on the hills

Best value: the last week of September, before the October rain

Every month's rain and temperature, from IPMA, in the full guide