Month guide · Castelo Viegas, Portugal
Castelo Viegas in May: weather and what to expect
In May, Castelo Viegas averages highs of 22°C and lows of 11°C, with about 11 rainy days and 85 mm of rain. Highs are 3°C warmer than in April and 3°C cooler than in June. Crowds in Centro are low.
Is May a good time to visit?
Good for
No verdicts for Castelo Viegas in May yet. They only use climate values that are precise enough to judge with.
Not ideal for
- Reliable dry weatherAbout 11 rainy days in the month
Daily highs through May
Town-level · ERA5-Land 1991-2020Highs climb about 4°C over the month. A day above 30°C happens in roughly 1 May in 2.
May in detail
Town-level · ERA5-LandCrowds, holidays and daylight
Public holidays in May 2027
- 1 May Labor Day
- 27 May Corpus Christi
Local (municipal) holidays are not included.
Warmer in May
Where is warm in May →| Place | High | Rain days | From Castelo Viegas |
|---|---|---|---|
| Montalvo, Oeste e Vale do Tejo | 24°C | 9 | 76 km |
| Montalvinho, Oeste e Vale do Tejo | 24°C | 9 | 76 km |
| Tomar, Oeste e Vale do Tejo | 23°C | 9 | 62 km |
| Sardoal, Oeste e Vale do Tejo | 23°C | 9 | 73 km |
| Meia Via, Oeste e Vale do Tejo | 23°C | 9 | 77 km |
The nearest towns with a warmer May. Distances are in a straight line.
How May is changing
Town-level · ERA5-LandMay highs are 1.3°C warmer than in 1991-2000, and May rainfall is down about 45% (2016-2025 against 1991-2000). Days above 25°C in May went from 4.9 to 8.5 a year on average.
Questions about Castelo Viegas in May
Is May a good time to visit Castelo Viegas?
It is less suited to reliable dry weather (about 11 rainy days in the month).
How warm is Castelo Viegas in May?
Average highs are 22°C and lows 11°C. April averages 19°C and June 25°C.
Does it rain much in Castelo Viegas in May?
About 11 days have at least 1 mm of rain, with 85 mm in total over the month.
Is Castelo Viegas busy in May?
In May 2025, nights booked through online platforms in Centro 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 Castelo Viegas in May?
About 14 h 22 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