Serres
Municipality of Irakleia
21,614 residents (2021) · −16.6% since 2011 · altitude 33 m · July 36 °C
- Population (2021 census)
- 21,614
- Change since 2011
- −16.6%
- Area
- 451.5 km²
- Density
- 48 per km²
- Altitude of the seat
- 33 m
- Regional unit
- Serres
Climate
Averages for 2001–2025: 31.0 days a year of 37 °C or more, 68 tropical nights, 31 frost days and about 577 mm of rain.
| Month | Mean high | Mean low | Rain |
|---|---|---|---|
| Jan | 9.8 °C | 1.4 °C | 53 mm |
| Feb | 12.0 °C | 2.6 °C | 39 mm |
| Mar | 15.8 °C | 5.1 °C | 49 mm |
| Apr | 20.3 °C | 8.9 °C | 48 mm |
| May | 26.2 °C | 14.1 °C | 55 mm |
| Jun | 32.2 °C | 19.0 °C | 49 mm |
| Jul | 36.2 °C | 22.1 °C | 33 mm |
| Aug | 35.9 °C | 22.1 °C | 30 mm |
| Sept | 29.9 °C | 17.4 °C | 45 mm |
| Oct | 23.1 °C | 11.8 °C | 54 mm |
| Nov | 16.9 °C | 7.3 °C | 53 mm |
| Dec | 11.1 °C | 2.8 °C | 69 mm |
Values are reanalysis on a grid of about 50 km, corrected to the seat's altitude. On islands and coasts the grid covers much sea, so summer highs on land are usually 1–3 °C above the table.
Heating: about 1,675 degree days a year. A 90 m² middle-floor flat from 1980–2010 would need around 900 litres of heating oil a winter.
Useful tools for the area
Nearby municipalities
Sources: ELSTAT censuses and area via Wikidata (CC0); altitude from the Copernicus DEM; climate from the NASA Langley Research Center POWER Project (MERRA-2 reanalysis on a grid of about 50 km, corrected to the seat's altitude). Some municipal boundaries changed in 2019, so the comparison with 2011 may not cover exactly the same area. Updated 2026-10-28. Wikidata Q2708275