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Rio Maior Climate by Month

The climate in Rio Maior is marked by big temperature swings throughout the year. Temperatures range from warm during the warmest months to mild in the cooler months. It receives mid-range precipitation levels. Let’s explore the climate details in depth to provide you with a complete overview.

Average day and night temperature

In Rio Maior, temperatures differ significantly between summer and winter months. Average daytime temperatures range from a comfortable 28°C in August, the warmest time of the year, to a moderate 15°C during cooler months like January. At night, temperatures typically average around 7°C during these months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

On average, Rio Maior receives a reasonable amount of rainfall, with an annual precipitation of 662 mm. Significant seasonal changes in precipitation occur throughout the year. During the wetter season, November receives moderate rainfall, averaging 89 mm of precipitation, recorded across 14 rainy days. In contrast, the drier season, July brings less rainfall, with 6.8 mm over 3 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Seasonal changes in sunshine hours are quite dramatic in Rio Maior. While August receives considerable daily sunshine with up to 8.5 hours, February marks the darkest time of the year, where sunshine is scarce with only 4.1 hours of sunlight per day.

Monthly hours of sunshine

Data from: Cabo Carvoeiro, Portugal (40 KM, 25 Miles).

Daily hours of sunshine

Data from: Cabo Carvoeiro, Portugal (40 KM, 25 Miles).

The best time of year to visit Rio Maior in Portugal

During the months of April, May, June and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is summer in Rio Maior?
    The hottest season / summer takes place in June, July, August and September.
  • Does Rio Maior have a dry season?
    Yes, the months of June, July and August are very dry.
  • Which is the warmest month in Rio Maior?
    August has an average maximum temperature of 28°C and is the warmest month of the year.
  • Which is the coldest month in Rio Maior?
    The coldest month is January with an average maximum temperature of 15°C.
  • Which is the wettest month in Rio Maior?
    November tops the wettest month list with 89 mm of rainfall.
  • Which is the driest month in Rio Maior?
    July is the driest month with 7 mm of precipitation.
  • Which is the sunniest month in Rio Maior?
    August is the sunniest month with an average of 255 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Rio Maior

    Sun   Dec 15
    15°C | 6°C
    E 18 km/h
    broken clouds and no rain

    broken clouds and no rain

    Mon   Dec 16
    15°C | 5°C
    E 22 km/h
    broken clouds and no rain

    broken clouds and no rain

    Tue   Dec 17
    16°C | 7°C
    E 18 km/h
    almost clear and no rain

    almost clear and no rain