Weather in Heraklion in September 2025
Average weather
Average temperature in Heraklion in September
Going from a maximum of +91°F during the day to a minimum of +66°F during the night, the temperature in September averages around +82°F.
The average maximum temperature goes down 21% by the end of the month, compared with the beginning of the month, from +84°F to +79°F.
Is Heraklion warm or cold in September?
Heraklion is typically warm in September.
Maximum temperatures go down compared to the previous month from +82°F to +79°F. The minimum temperature also goes down from +73°F to +70°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
September is one of the warmest months in Heraklion, here is the comparison with other months:
Water temperature in Heraklion in September
Water in Heraklion in September is Warm. It varies from +75°F to +79°F, with an average of +77°F. This is almost similar to the air temperature, which averages +79°F.
The water temperature in September is one of the warmest of the entire year:
Can you swim in Heraklion in September?
Climate in Heraklion in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +82°F | +79°F | +73°F | ||||
| Min. temperature | ||||||
| +68°F | +57°F | +54°F | ||||
| Max. temperature | ||||||
| +104°F | +99°F | +91°F | ||||
| Rainfall | ||||||
| 5 mm | 17 mm | 47 mm | ||||
| Wind | ||||||
| 4 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +79°F | +77°F | +73°F | ||||
| Humidity | ||||||
| 62% | 64% | 67% | ||||
| Air pressure | ||||||
| 1010 HPa | 1013 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 29 | 22 | 12 | ||||
| Cloudy days | ||||||
| 1 | 3 | 9 | ||||
| Rainy days | ||||||
| 1 | 4 | 7 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as great as in August. It’s getting colder in September. From +82°F in the day, the average maximum temperature lowers to +79°F. Prepare for more rain. Average rainfall goes from 5 mm to 17 mm. Humidity rises from 62% to 64%. Winds are calmer in comparison to August, going down from 4 m/s to 3 m/s on average. The days becoming less sunny, going from 29 sunny days in August to 22 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Heraklion is gradually increasing during September, going from 5 m/s to 5 m/s over the course of the month.
Rain
How was the weather last September in Heraklion?
Climate Change Over the Years
The climate in Heraklion in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1983 (+68°F) and the highest in 2023 (+73°F). The driest year was 1990 with only 234 mm of rainfall, and the wettest year was 2019 with 1122 mm.
FAQ
Is September a good time to visit Heraklion?
Can you sunbathe in Heraklion in September?
Can you swim in Heraklion in September?
Is Heraklion rainy in September?
Is it sunny in Heraklion in September?
Other cities in Greece
Monthly weather in Heraklion
Source of the data
For this page, we’ve looked at the typical weather in Heraklion, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.