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Month guide · Mértola, Portugal

Mértola in April: weather and what to expect

April is the wettest month of the year in Mértola. In April, Mértola is the warmest town in Portugal. In April, Mértola averages highs of 22°C and lows of 11°C, with about 8 rainy days and 48 mm of rain. Crowds in the Alentejo are low.

Based on 1991-2020 climate data · Updated 1 November 2026 · Sources

Average high Town-level22°CLow 11°C
Rainy days Town-level848 mm in total
UV index Modelled7High at noon on a clear day
Crowds RegionalLowThe Alentejo as a whole

Is April a good time to visit?

Good for

No verdicts for Mértola in April yet. They only use climate values that are precise enough to judge with.

Not ideal for

Nothing stands out as a weaker fit.

Daily highs through April

Town-level · ERA5-Land 1991-2020
Usual range (8 in 10 years)Typical high

Highs climb about 2°C over the month. A day above 30°C happens in roughly 1 April in 4.

April in detail

Town-level · ERA5-Land
MeasureMarchAprilMay
Average high20°C22°C26°C
Average low9°C11°C14°C
Rainy days (at least 1 mm)787
Total rainfall47 mm48 mm36 mm
Daylight (mid-month)11 h 53 min13 h 08 min14 h 10 min

Crowds, holidays and daylight

Visitor level RegionalLowNights booked through online platforms in the Alentejo in April 2025: about 30% of the busiest month.

Public holidays in April 2027

  • 25 Apr Freedom Day

Local (municipal) holidays are not included.

Daylight mid-month Exact13 h 08 minSunrise to sunset, calculated from the town's coordinates.

Warmer in April

Where is warm in April →

No town in Portugal with precise enough data has a warmer average April high than Mértola.

How April is changing

Town-level · ERA5-Land

April highs are 0.8°C warmer than in 1991-2000, and April rainfall is about the same (2016-2025 against 1991-2000). Days above 25°C in April went from 6.5 to 8.5 a year on average.

Questions about Mértola in April

How warm is Mértola in April?

Average highs are 22°C and lows 11°C. March averages 20°C and May 26°C.

Does it rain much in Mértola in April?

About 8 days have at least 1 mm of rain, with 48 mm in total over the month.

Is Mértola busy in April?

In April 2025, nights booked through online platforms in the Alentejo were about 30% of the busiest month, which we count as low. The figure is for the whole region and leaves out hotels.

How long are the days in Mértola in April?

About 13 h 08 min from sunrise to sunset in the middle of the month.

Sources

Climate: ERA5-Land, Copernicus Climate Change Service (C3S) Climate Data Store, contains modified Copernicus information (CC BY 4.0). Crowds: Eurostat, nights spent in short-stay accommodation booked through online platforms (tour_ce_omn12) (CC BY 4.0). Place names and populations: GeoNames (CC BY 4.0). Climate averages cover 1991-2020. Daylight: calculated from the town's coordinates. Full methodology