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Month guide · Mértola, Portugal

Mértola in July: weather and what to expect

July is the warmest month of the year in Mértola. In July, Mértola is the warmest town in Portugal. In July, Mértola averages highs of 34°C and lows of 19°C, with almost no rainy days and 2 mm of rain. Crowds in the Alentejo are high.

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

Average high Town-level34°CLow 19°C
Rainy days Town-level02 mm in total
UV index Modelled9Very high at noon on a clear day
Crowds RegionalHighThe Alentejo as a whole

Is July a good time to visit?

Good for

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

Not ideal for

  • Outdoor activity at midday
    Average highs of 34°C

Daily highs through July

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 40°C happens in roughly 1 July in 2; nights below 15°C in about 1 in 3.

July in detail

Town-level · ERA5-Land
MeasureJuneJulyAugust
Average high31°C34°C34°C
Average low17°C19°C20°C
Rainy days (at least 1 mm)201
Total rainfall10 mm2 mm5 mm
Daylight (mid-month)14 h 45 min14 h 32 min13 h 40 min

Crowds, holidays and daylight

Visitor level RegionalHighNights booked through online platforms in the Alentejo in July 2025: about 70% of the busiest month.

Public holidays in July 2027

No national or regional public holidays.

Local (municipal) holidays are not included.

Daylight mid-month Exact14 h 32 minSunrise to sunset, calculated from the town's coordinates.

Warmer in July

Where is warm in July →

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

How July is changing

Town-level · ERA5-Land

July highs are 1.2°C warmer than in 1991-2000 (2016-2025 against 1991-2000).

Questions about Mértola in July

Is July a good time to visit Mértola?

It is less suited to outdoor activity at midday (average highs of 34°C).

How warm is Mértola in July?

Average highs are 34°C and lows 19°C. June averages 31°C and August 34°C.

Does it rain much in Mértola in July?

Hardly any days have at least 1 mm of rain, with 2 mm in total over the month.

Is Mértola busy in July?

In July 2025, nights booked through online platforms in the Alentejo were about 70% of the busiest month, which we count as high. The figure is for the whole region and leaves out hotels.

How long are the days in Mértola in July?

About 14 h 32 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