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January in Rio de Onor brings low temperatures, with highs of 9°C (48°F) and nights dropping to 1°C (34°F). Rainfall is on the higher side this month, averaging around 104 mm (4.1 in), so keep a rain jacket handy.
If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Rio de Onor. Our weather planner can help you explore destinations with more pleasant weather conditions.
Pick a month to see the average temperature, rainfall and sunshine in Rio de Onor - and find the best time to visit.
51-year average (1976-2026)
Based on our historical records, temperatures in Rio de Onor typically stay consistent throughout January, with daily highs averaging around 9°C (48°F). Nights are cold, with lows around 1°C (34°F).
51-year average (1976-2026)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Rio de Onor spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Rio de Onor between 2000 and 2025, these are the recorded extremes during 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 is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
We recommend to layer up for chilly conditions in Rio de Onor in January. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. 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 month
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Rio de Onor climate overview or explore weather in Portugal.
Where to go in January - average daytime high across popular destinations.
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