Month guide · Castanheira do Ribatejo, Portugal

Castanheira do Ribatejo in August: weather and what to expect

August is the warmest month of the year in Castanheira do Ribatejo. August highs in Castanheira do Ribatejo are now 1.1°C warmer than in 1991-2000. In August, Castanheira do Ribatejo averages highs of 29°C and lows of 18°C, with about 2 rainy days and 7 mm of rain. Crowds in the Lisbon area are at their peak.

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

Average high Town-level29°CLow 18°C
Sea temperature Modelled18°COpen sea nearby, average for the month
Rainy days Town-level27 mm in total
UV index Modelled8Very high at noon on a clear day
Crowds RegionalPeakThe Lisbon area as a whole

Is August a good time to visit?

Good for

No verdicts for Castanheira do Ribatejo in August 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 August

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

Highs stay about the same through the month.

August in detail

Town-level · ERA5-Land
MeasureJulyAugustSeptember
Average high29°C29°C27°C
Average low18°C18°C17°C
Rainy days (at least 1 mm)125
Total rainfall4 mm7 mm33 mm
Daylight (mid-month)14 h 40 min13 h 44 min12 h 30 min

Crowds, holidays and daylight

Visitor level RegionalPeakNights booked through online platforms in the Lisbon area in August 2025: the busiest month of the year.

Public holidays in August 2027

  • 15 Aug Assumption Day

Local (municipal) holidays are not included.

Daylight mid-month Exact13 h 44 minSunrise to sunset, calculated from the town's coordinates.

The nearest towns with a warmer August. Distances are in a straight line.

How August is changing

Town-level · ERA5-Land

August highs are 1.1°C warmer than in 1991-2000, and August rainfall is down about 75% (2016-2025 against 1991-2000). Days above 30°C in August went from 8.7 to 12 a year on average.

Questions about Castanheira do Ribatejo in August

How warm is Castanheira do Ribatejo in August?

Average highs are 29°C and lows 18°C. July averages 29°C and September 27°C.

Does it rain much in Castanheira do Ribatejo in August?

About 2 days have at least 1 mm of rain, with 7 mm in total over the month.

Is Castanheira do Ribatejo busy in August?

In August 2025, nights booked through online platforms in the Lisbon area were the busiest month of the year, which we count as peak. The figure is for the whole region and leaves out hotels.

How long are the days in Castanheira do Ribatejo in August?

About 13 h 44 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