Cascais Weather in January
January in Cascais typically sees daytime highs of 16°C (61°F) and nighttime lows of 12°C (54°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Cascais in January
Analyzing past climate data, one can expect approximately 14 days of rain, averaging 82 mm (3.2 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Cascais in January
January in Cascais brings typical temperatures with highs around 16°C (61°F) and lows of 12°C (54°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable. Expect mild temperatures during this month, but it stays comfortably warm and inviting. It is the coolest month of the year.
Sunshine in Cascais in January
The area experiences a moderate amount of sunshine, with approximately 163 hours of sunlight expected. This means a decent mix of sun and overcast.January in Cascais can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Cascais's climate page.
Cascais Temperature in January
Min Temperature
12°C (54°F)
Max Temperature
16°C (61°F)
Chance of Rain
48%
Precipitation
82 mm (3.2 in)
Rainy days
14 days
Humidity
82%
Sunshine
163 hours
Percentage Sunshine
53%
Daily Historical Temperatures
50-year average (1976-2026)
Based on our historical records, temperatures in Cascais typically stay consistent throughout January, with daily highs averaging around 16°C (61°F). Nights are cold, with lows around 8°C (46°F).
Average temperatures in January
Daily Historical Precipitation
50-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in January
Historical weather for Cascais in January
Browse day-by-day weather records for Cascais spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cascais historical weather extremes in January
Based on weather observations in Cascais between 2000 and 2025, these are the recorded extremes during January.
- The warmest day in January was on January 27, 2003, with a maximum of 22°C (72°F).
- On January 28, 2007, Cascais saw its coldest January day with temperatures maxing out at 7°C (45°F).
- Cascais registered its coldest January night on January 9, 2009, with temperatures dropping to -1°C (30°F).
Best Places in Portugal in January
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in January →
perfect weather
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tolerable
unpleasant
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What to Wear in Cascais in January
The weather can be unpredictable in January, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Cascais in January
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Cascais's climate page.
Temperature Rainfall Sunshine Humidity
See the full Cascais climate overview or explore weather in Portugal.
