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Month guide · Mértola, Portugal

Mértola in October: weather and what to expect

In October, Mértola averages highs of 24°C and lows of 15°C, with about 7 rainy days and 61 mm of rain. Highs are 5°C cooler than in September and 6°C warmer than in November. Crowds in the Alentejo are low.

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

Average high Town-level24°CLow 15°C
Rainy days Town-level761 mm in total
UV index Modelled4Moderate at noon on a clear day
Crowds RegionalLowThe Alentejo as a whole

Is October a good time to visit?

Good for

No verdicts for Mértola in October 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 October

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

Highs fall about 5°C over the month. A day above 30°C happens in roughly 1 October in 2; nights below 10°C in about 1 in 2.

October in detail

Town-level · ERA5-Land
MeasureSeptemberOctoberNovember
Average high30°C24°C19°C
Average low18°C15°C10°C
Rainy days (at least 1 mm)477
Total rainfall24 mm61 mm57 mm
Daylight (mid-month)12 h 29 min11 h 17 min10 h 11 min

Crowds, holidays and daylight

Visitor level RegionalLowNights booked through online platforms in the Alentejo in October 2025: about 25% of the busiest month.

Public holidays in October 2027

  • 5 Oct Republic Day

Local (municipal) holidays are not included.

Daylight mid-month Exact11 h 17 minSunrise to sunset, calculated from the town's coordinates.

Warmer in October

Where is warm in October →

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

How October is changing

Town-level · ERA5-Land

October highs are 2.7°C warmer than in 1991-2000, and October rainfall is about the same (2016-2025 against 1991-2000). Days above 30°C in October went from 0.9 to 7.0 a year on average.

Questions about Mértola in October

How warm is Mértola in October?

Average highs are 24°C and lows 15°C. September averages 30°C and November 19°C.

Does it rain much in Mértola in October?

About 7 days have at least 1 mm of rain, with 61 mm in total over the month.

Is Mértola busy in October?

In October 2025, nights booked through online platforms in the Alentejo were about 25% 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 October?

About 11 h 17 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