Serres
Municipality of Visaltia
23,468 residents (2021) · −15.4% since 2011 · altitude 127 m · July 35 °C
- Population (2021 census)
- 23,468
- Change since 2011
- −15.4%
- Area
- 658.3 km²
- Density
- 36 per km²
- Altitude of the seat
- 127 m
- Regional unit
- Serres
Climate
Averages for 2001–2025: 17.7 days a year of 37 °C or more, 66 tropical nights, 26 frost days and about 544 mm of rain.
| Month | Mean high | Mean low | Rain |
|---|---|---|---|
| Jan | 9.5 °C | 1.9 °C | 53 mm |
| Feb | 11.4 °C | 2.8 °C | 38 mm |
| Mar | 15.0 °C | 5.3 °C | 48 mm |
| Apr | 19.4 °C | 8.9 °C | 44 mm |
| May | 25.2 °C | 14.1 °C | 50 mm |
| Jun | 31.0 °C | 18.9 °C | 46 mm |
| Jul | 34.8 °C | 21.8 °C | 30 mm |
| Aug | 34.7 °C | 21.7 °C | 25 mm |
| Sept | 28.9 °C | 17.3 °C | 43 mm |
| Oct | 22.3 °C | 11.9 °C | 51 mm |
| Nov | 16.5 °C | 7.7 °C | 50 mm |
| Dec | 10.9 °C | 3.4 °C | 66 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 1,692 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 Q2324833