Monthly climatological summary - September 2026
| Station | TN | TX | TNN | D | TXX | D | RR | RRMAX | D | FFMAX | Dia |
|---|
Legend
TN - Average minimum temperature (Degree Celsius)
TX - Average maximum temperature (Degree Celsius)
TNN/D - Absolute minimum temperature (Degree Celsius) and day of occurrence
TXX/D - Absolute maximum temperature (Degree Celsius) and day of occurrence
RR - Total precipitation (milimeters)
RRMAX/D - Daily maximum precipitation (milimeters) and day of occurrence
FFMAX/D - Maximum wind intensity, gust (km/h) and day of occurrence
Notes: The used normal values refer to the period 1971-2000 - UTC Hours – Winter: UTC hour = equal to the legal time Summer: UTC hour = -1h in relation to the legal time - Units: Wind: 1 Km/h = 0.28m/s Precipitation: 1mm = 1 kg/m2 Radiation: 1 J = 1Ws
Summary
The month of September in mainland Portugal was classified as extremely hot in terms of air temperature and very dry in terms of precipitation.
| Extreme values | ||
|---|---|---|
| Parameter | Value, location and date | |
| Highest maximum air temperature | 44.3 °C in Alcochete, on the 3rd | |
| Lowest minimum air temperature | 3.0 °C in Lamas de Mouro, on the 25th | |
| Highest 24-hour rainfall | 53.2 mm in Ponte de Lima, on the 29th | |
| Highest maximum wind speed (gust) | 91.8 km/h at Cabo da Roca, on the 29th | |
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Lisboa:
UTC:
Copyright © Portuguese Institute for Sea and Atmosphere 2026
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