Weather: rain in mountains, up to 34°C elsewhere

Cloudy conditions with rain and isolated storms, mainly in mountain areas, are forecast by the Hellenic National Meteorological Service (EMY) for Monday, 21 September 2026, according to in.gr. In the rest of the country, weather conditions are expected to be generally clear, with temperatures remaining unusually high for the season, in a picture that, as the same source describes it, is more reminiscent of summer conditions than early autumn. The EMY forecast, as reported by in.gr, concerns all Greek territory for that day, with clear distinction between mountain and other areas.

As in.gr reports, the maximum temperature is expected to reach 33 to 34 degrees Celsius locally, with the highest values recorded in Thessaly and the Peloponnese. Winds, according to the same source, will blow with intensity 3 to 5 Beaufort, with no particularly intense phenomena reported outside mountain and mainland areas where rain and storms are expected. The EMY forecast, as reported by in.gr, makes no mention of specific protective measures beyond the general description of weather phenomena for the day, nor does it specify particular times for storm appearance in mountain areas or duration of rainfall.

The coexistence of rain and storms in mountain areas with high temperatures in lowland and coastal areas, as described by in.gr, reflects the unstable atmospheric conditions prevailing in parts of the country during the current period. For mountain area residents, the forecast for isolated storms implies increased caution, while in areas such as Thessaly and the Peloponnese the heat of 33 to 34 degrees maintains conditions more summery than autumnal, affecting daily activities and travel in urban and rural areas. The mild to moderate winds of 3 to 5 Beaufort, according to in.gr, are not expected to create particular problems for maritime or land travel, as this represents relatively low intensity compared to other periods of the year.

In.gr notes that instability is expected to continue in the coming days, but provides no further details on weather evolution beyond Monday, 21 September 2026. The source does not mention a named weather system or warning bulletin number, limiting itself to describing the general picture for that specific day, with cloud cover in mountain areas and heat in other areas being the two main characteristics of the forecast for Monday. For related news around weather phenomena, see also the article on barometric low and flood risk in the south.