Heraklion
Municipality of Viannos
5,504 residents (2021) · −12.2% since 2011 · altitude 857 m · July 25 °C
- Population (2021 census)
- 5,504
- Change since 2011
- −12.2%
- Altitude of the seat
- 857 m
- Regional unit
- Heraklion
Climate
Averages for 2001–2025: 0.0 days a year of 37 °C or more, 30 tropical nights, 0 frost days and about 468 mm of rain.
| Month | Mean high | Mean low | Rain |
|---|---|---|---|
| Jan | 10.0 °C | 7.3 °C | 84 mm |
| Feb | 9.9 °C | 6.9 °C | 72 mm |
| Mar | 11.5 °C | 7.9 °C | 43 mm |
| Apr | 14.1 °C | 9.8 °C | 28 mm |
| May | 18.2 °C | 13.2 °C | 19 mm |
| Jun | 22.4 °C | 17.1 °C | 7 mm |
| Jul | 24.9 °C | 19.5 °C | 2 mm |
| Aug | 25.2 °C | 20.0 °C | 4 mm |
| Sept | 22.8 °C | 18.2 °C | 19 mm |
| Oct | 18.9 °C | 15.2 °C | 44 mm |
| Nov | 15.3 °C | 12.2 °C | 55 mm |
| Dec | 11.7 °C | 9.1 °C | 91 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 1,432 degree days a year. A 90 m² middle-floor flat from 1980–2010 would need around 750 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 Q693813