Weather · Cascais, Portugal
Cascais Weather in December
December in Cascais averages 16°C by day and 12°C at night, with about 145mm of rain. That makes it not the easiest month, weather-wise.
Avg high
16°C
61°F
Avg low
12°C
54°F
Rainfall
145mm
#1 wettest of 12
What to pack
Layers, plus a jacket for mornings and nights. Bring a compact umbrella for the odd shower.
Timing a trip around the weather? A Local Friend in Cascais builds it around the season for you.