What September feels like in Heraklion
September is early autumn in Heraklion. Afternoons hit 28.1°C (82.6°F), about 2.8°C (5°F) below the July peak: sightseeing works best in the morning or evening. Nights fall to about 20.2°C (68.4°F), 7.9°C (14.2°F) below the afternoon, still warm enough for short sleeves. Humidity averages 64%: hot spells feel a little sticky.
Rain in Heraklion in September
Rain turns up on about 4 of 30 days; wet days bring about 6.1 mm (0.2 in), enough to soak you without an umbrella, close to the city's usual 6.5 mm.
How September compares to the rest of the year
September is the 4th warmest month of the year; afternoons are 2.8°C (5°F) cooler than in August, with 17 mm more rain. Temperatures keep falling into October, to about 23.7°C (74.7°F), and it gets wetter.
September in Heraklion: what 20 years show
Based on monthly averages from 2006–2025, not daily records.
Usual range
In most years September averages 27–30°C (81–85°F) in the afternoon, with 9–45 mm of rain. Rain falls about one day in 8 in an average September.
Records
| Record | Year | Avg high | Rain | Rainy days |
|---|---|---|---|---|
| Warmest September | 2013 | 29.9°C (85.8°F) | 1 mm | 0 |
| Coolest September | 2009 | 26.2°C (79.2°F) | 77 mm | 6 |
| Wettest September | 2009 | 26.2°C (79.2°F) | 77 mm | 6 |
| Driest September | 2013 | 29.9°C (85.8°F) | 1 mm | 0 |
Odds across years
In 6 of 20 years, September had 6 or more rainy days. In 4 of 20 years, it had under 10 mm of rain. In 5 of 20 years, the average high reached 29°C (84.2°F) or more. In 9 of 20 years, it stayed below 28°C (82.4°F).
Who September suits
- Sightseeing: a good fit — warm but manageable for a city walk.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
Tips for visiting Heraklion in September
Sun Protection
Loose, breathable clothing plus sunscreen and a wide-brimmed hat.
What to wear in Heraklion in September
These are estimates from monthly averages, so read each temperature as "around".
By time of day
- Morning, around 22°C (71°F): light clothes with a thin layer to start.
- Afternoon, around 28°C (83°F): light clothes, a hat and sunscreen.
- Evening, around 24°C (75°F): add the thin layer again.
Cooler year or hotter year
In a cooler year like 2009, September highs averaged 26.2°C (79.2°F), so a light extra layer is worth packing. In a hotter year like 2013 they reached 29.9°C (85.8°F), so keep your clothes light.
Packing for 7 days
Expect about 1 wet day in a week, with about 6.1 mm (0.2 in) on that day.
- Light, breathable clothes
- A thin layer for the morning and evening
- A hat, sunscreen and sunglasses
- Light, breathable shoes
Travelling on specific dates? Check your exact dates in the Trip Planner.
Quick questions
How warm is Heraklion in September?
Afternoons average 28.1°C (82.6°F) and nights about 20.2°C (68.4°F), hot by most people's standards; it is the 4th warmest month of the year.
Does it rain a lot in Heraklion in September?
Not especially: about 4 rainy days (24 mm), mostly moderate rain.
What should I wear in Heraklion in September?
Pack sun protection, plus a layer for cool mornings and evenings.
Is September or October better for visiting Heraklion?
September scores clearly better on our climate ranking (#4 of 12 vs #7). October is cooler and has more rainy days.
