Month guide · Palmela, Portugal

Palmela in May: weather and what to expect

In May, Palmela averages highs of 21°C and lows of 13°C, with about 7 rainy days and 42 mm of rain. Highs are 3°C warmer than in April and 4°C cooler than in June. Our rules rate it good for walking and cycling. Crowds in the Lisbon area are high.

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

Average high Town-level21°CLow 13°C
Sea temperature Modelled17°COpen sea nearby, average for the month
Rainy days Town-level742 mm in total
UV index Modelled8Very high at noon on a clear day
Crowds RegionalHighThe Lisbon area as a whole

Is May a good time to visit?

Good for

  • Walking and cycling
    Highs of 21°C with about 7 rainy days

Not ideal for

Nothing stands out as a weaker fit.

Daily highs through May

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

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

May in detail

Town-level · ERA5-Land
MeasureAprilMayJune
Average high18°C21°C25°C
Average low10°C13°C15°C
Rainy days (at least 1 mm)972
Total rainfall52 mm42 mm11 mm
Daylight (mid-month)13 h 10 min14 h 14 min14 h 50 min

Crowds, holidays and daylight

Visitor level RegionalHighNights booked through online platforms in the Lisbon area in May 2025: about 75% of the busiest month.

Public holidays in May 2027

  • 1 May Labor Day
  • 27 May Corpus Christi

Local (municipal) holidays are not included.

Daylight mid-month Exact14 h 14 minSunrise to sunset, calculated from the town's coordinates.

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

How May is changing

Town-level · ERA5-Land

May highs are 1.9°C warmer than in 1991-2000, and May rainfall is down about 35% (2016-2025 against 1991-2000). Days above 25°C in May went from 4.0 to 7.3 a year on average.

Questions about Palmela in May

Is May a good time to visit Palmela?

Our rules rate May good for walking and cycling (highs of 21°C with about 7 rainy days).

How warm is Palmela in May?

Average highs are 21°C and lows 13°C. April averages 18°C and June 25°C.

Does it rain much in Palmela in May?

About 7 days have at least 1 mm of rain, with 42 mm in total over the month.

Is Palmela busy in May?

In May 2025, nights booked through online platforms in the Lisbon area were about 75% 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 Palmela in May?

About 14 h 14 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