The best time to visit Heraklion is April, May, June, September and October, when average highs sit in the comfortable low-to-high twenties, rain is scarce and sunshine is long. May brings an average high of 25.1 °C with just 6 rain days, while October reaches 24.7 °C with 5 rain days and October's mild warmth carries into the shoulder. July and August are hottest and busiest with school-holiday crowds, so they fall outside the pick. Winter is quiet and much cooler, with January's high of 15.6 °C and 12 rain days.
Best months AprilMayJuneSeptemberOctober
Heraklion (Crete) month by month
Average highs and lows (°C), 2016–2025. Highlighted bars are the best months.
| Month | High | Low | Rain days | Sun / day |
|---|---|---|---|---|
| January | 15.6 °C | 9 °C | 12 | 7.8 h |
| February | 16.3 °C | 9.2 °C | 10 | 8.8 h |
| March | 18.1 °C | 10.1 °C | 9 | 9.9 h |
| April | 21.4 °C | 12.5 °C | 5 | 11.2 h |
| May | 25.1 °C | 16.1 °C | 6 | 12.2 h |
| June | 29.2 °C | 20.5 °C | 2 | 13.6 h |
| July | 31.2 °C | 23.3 °C | 1 | 13.4 h |
| August | 30.9 °C | 23.3 °C | 1 | 12.9 h |
| September | 28.4 °C | 20.6 °C | 4 | 11.7 h |
| October | 24.7 °C | 17.2 °C | 5 | 9.9 h |
| November | 21.3 °C | 14.2 °C | 8 | 9.1 h |
| December | 17.3 °C | 10.8 °C | 12 | 7.9 h |
How the months are picked.A month qualifies when its average high sits in the comfortable 20–28 °C band (scored down towards 9 °C and 37 °C), rain days are few and sunshine hours are high — at least 78 % of the city's best-scoring month. July and August are then set aside as peak season (school-holiday crowds and prices) whenever at least three other months qualify; where summer is the only comfortable window they stay. Figures are ten-year averages (2016-01-01 to 2025-12-31) from ERA5 reanalysis data via Open-Meteo (CC BY 4.0) for the city centre coordinates.
When to go, and what to expect
Spring (Mar–May)
Ideal for Knossos and walking before the heat — a top window.
Summer (Jun–Aug)
June is warm but manageable; midsummer suits beach-and-heat lovers only.
Autumn (Sep–Nov)
September and October are superb — warm sea, sun and fewer people.
Winter (Dec–Feb)
For culture-first travellers happy with cool, showery days.
Notable events
- Spring (April, sometimes early May)
- Greek Orthodox Easter celebrations
- Summer (July–September)
- Heraklion Summer Arts Festival (music, theatre, film)
- November
- Feast of Agios Minas, the city's patron saint
- Autumn (September–October)
- Cretan grape and wine harvest festivities
Frequently asked
Is August too hot to visit Heraklion?
August is hot, with an average high of 30.9 °C and only 1 rain day. It's fine for beach days but tough for sightseeing at Knossos, and it's the busiest month — cooler June (29.2 °C) or September (28.4 °C) are easier.
What is the rainiest month in Heraklion?
January and December are wettest, each with 12 rain days. By contrast June, July and August see just 1–2 rain days, and the best months of April and October have only 5 rain days.
Is winter worth visiting Heraklion?
Winter is quiet and mild rather than cold — January reaches 15.6 °C — but expect 12 rain days and shorter days with 7.8 hours of sunshine. It suits museum and history travellers, not beach-goers.
Know when to go? Now decide where to stay — our Heraklion (Crete) area guide →
Areas of Heraklion (Crete)
Best time to visit near here
Sources
- Open-Meteo historical weather API — monthly climate normals, 2016–2025 (CC BY 4.0)
- ERA5 reanalysis (ECMWF / Copernicus) — the underlying temperature, precipitation and sunshine data
- ReasonStay methodology — how the best months are computed and checked
An independent guide to Heraklion (Crete) — honest, verified, no invented data. Climate figures: ERA5 via Open-Meteo, 2016–2025 averages; the best months are computed from them, not opinion.