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Greece in October: Thessaloniki, Athens and Heraklion climate comparison
Compare Thessaloniki, Athens and Heraklion in October using the 2001-2025 series below to plan shoulder-season sightseeing and island transfers.
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Climate reference locations
These numbered markers show reference locations with historical climate estimates (2001-2025) for each area. Select a location on the map or via the quick buttons to jump to its climate table.
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Map data: Natural Earth
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3 climate reference locations
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- Thessaloniki (October · 16 °C · 1.6 mm/day (2001-2025))
- Athens (October · 19.1 °C · 1.6 mm/day (2001-2025))
- Heraklion (October · 21.1 °C · 1.5 mm/day (2001-2025))
Location coordinates: Thessaloniki, Athens, Heraklion (Wikidata, CC0).
Use the 5-degree north-to-south gradient to structure an October trip
Across the 2001-2025 October series, mean monthly temperatures step up steadily from north to south: 16.0 °C in Thessaloniki, 19.1 °C in Athens and 21.1 °C in Heraklion on Crete, while mean precipitation stays modest across all three points (1.5 to 1.6 mm/day).
October suits walking-heavy itineraries around Athens and Thessaloniki’s UNESCO monuments as well as southern stays on Crete, without the intense midday heat of July and August.
- Thessaloniki (16.0 °C, 1.6 mm/day): pack a light jacket for evening waterfront walks along the Thermaic Gulf.
- Athens (19.1 °C, 1.6 mm/day): comfortable conditions for the Acropolis, Agora and neighbourhood walks.
- Heraklion and Crete (21.1 °C, 1.5 mm/day): warmest October mean among the three Greek reference points.
Sources: UNESCO Monuments in Thessaloniki, Thessaloniki New Waterfront
Read the local month comparison
Across the selected points, mean monthly temperature ranges from 16.0 to 21.1 °C. Mean precipitation ranges from 1.5 to 1.6 mm per day. Those ranges describe this selected point comparison, not every destination in Greece.
Use the comparison for trip planning
- Check which named point is relevant to the stops on your actual route.
- Use mean temperature as background for planning your activities. A monthly mean includes both daytime and night-time conditions.
- Keep alternatives for weather-dependent plans and check a local forecast close to departure.
- Do not infer rain hours, rainy-day counts or severe-weather risk from millimetres per day.
Source and processing
NASA POWER climatology, 2001-2025. The values are T2M (mean air temperature at two metres, °C) and PRECTOTCORR (mean corrected precipitation, mm/day). City coordinates come from Wikidata. Selection, month extraction, translation, rounding and table arrangement are changes to the original data. NASA POWER data licence: CC BY 4.0. Coordinates: CC0.
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Climate by month
These historical gridded estimates describe the area around each coordinate. They are not a forecast for a particular trip. Precipitation in millimetres per day is not a count of rainy days.
Thessaloniki
Reference period 2001-2025 · Coordinates (latitude, longitude) 40.6403°, 22.9356°
| Month | Mean air temperature at 2 m (°C) | Mean precipitation (mm/day) |
|---|---|---|
| October | 16 | 1.6 |
Athens
Reference period 2001-2025 · Coordinates (latitude, longitude) 37.9842°, 23.7281°
| Month | Mean air temperature at 2 m (°C) | Mean precipitation (mm/day) |
|---|---|---|
| October | 19.1 | 1.6 |
Heraklion
Reference period 2001-2025 · Coordinates (latitude, longitude) 35.3403°, 25.1344°
| Month | Mean air temperature at 2 m (°C) | Mean precipitation (mm/day) |
|---|---|---|
| October | 21.1 | 1.5 |
Sources
- UNESCO Monuments in Thessaloniki (Thessaloniki Tourism Organization). Accessed
- Thessaloniki New Waterfront (Thessaloniki Tourism Organization). Accessed
- NASA POWER Climatology API (NASA POWER). Accessed
- NASA POWER temporal data processing (NASA POWER). Accessed
- NASA POWER dataset and data licence (NASA / Registry of Open Data on AWS). Accessed
- Wikidata structured-data licensing (Wikimedia). Accessed
- Thessaloniki coordinate record (Wikidata). Accessed
- Athens coordinate record (Wikidata). Accessed
- Heraklion coordinate record (Wikidata). Accessed