Weather in Kefalonia for September 2025
Until now, September 2025 in Kefalonia has been nearly identical to the historical average, with a temperature of 26.5 °C (showing only a slight deviation of -0.2 °C).
Expect cooler weather in the next days in Kefalonia with the forecast suggesting a temperature of 25.6 °C, lower than the historical average.
In general, the average temperature in Kefalonia at the beginning of September is 26.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 24.4 °C by the end of September.
Kefalonia in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 68.3 mm.
Is September a good time to visit Kefalonia? check out the best time to travel to Kefalonia page.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
Kefalonia Weather September
Temperatures trend during September in Kefalonia
September weather in Kefalonia day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Sunny | 26° /22° | 0.7 mm | 7 | |
| 2 Sept. | Sunny | 27° /21° | 0 mm | 7 | |
| 3 Sept. | Sunny | 28° /22° | 0 mm | 7 | |
| 4 Sept. |  Moderate rain at times | 27° /22° | 4.6 mm | 7 | |
| 5 Sept. | Sunny | 25° /20° | 3.2 mm | 6 | |
| 6 Sept. | Sunny | 27° /20° | 3.1 mm | 7 | |
| 7 Sept. |  Patchy rain possible | 27° /21° | 1 mm | 6 | |
| 8 Sept. | Sunny | 27° /21° | 0.1 mm | 7 | |
| 9 Sept. | Sunny | 27° /21° | 0.5 mm | 7 | |
| 10 Sept. | Sunny | 27° /21° | 6.4 mm | 7 | |
| 11 Sept. | Sunny | 27° /22° | 2.2 mm | 7 | |
| 12 Sept. | Sunny | 26° /21° | 0.8 mm | 7 | |
| 13 Sept. | Sunny | 27° /21° | 0.7 mm | 7 | |
| 14 Sept. |  Overcast | 25° /20° | 0.5 mm | 6 | |
| 15 Sept. | Sunny | 27° /22° | 0 mm | 1.7 | |
| 16 Sept. | Sunny | 27° /22° | 0 mm | 1.7 | |
| 17 Sept. | Sunny | 26° /21° | 0 mm | 1.5 | |
| 18 Sept. | Sunny | 27° /22° | 0.1 mm | 1.7 | |
| 19 Sept. | Sunny | 25° /20° | 0.1 mm | 1.9 | |
| 20 Sept. | Sunny | 25° /20° | 0 mm | 6 | |
| 21 Sept. | Sunny | 26° /20° | 0 mm | 6 | |
| 22 Sept. | Sunny | 26° /20° | 0 mm | 6 | |
| 23 Sept. | Sunny | 25° /20° | 0 mm | 6 | |
| 24 Sept. | Sunny | 25° /21° | 0 mm | 6 | |
| 25 Sept. | Sunny | 25° /20° | 0 mm | 6 | |
| 26 Sept. | Sunny | 25° /21° | 0 mm | 6 | |
| 27 Sept. |  Moderate rain | 26° /23° | 5.9 mm | 5 | |
| 28 Sept. | Patchy rain possible | 23° /21° | 2.1 mm | 5 | |
| 29 Sept. |  Patchy light rain with thunder | 24° /20° | 0.8 mm | 5 | |
| 30 Sept. | Patchy light rain with thunder | 23° /19° | 1.4 mm | 6 | |
| Next | |||||
Kefalonia weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 29°/23° | 25°/21° | 23°/19° |
| Rainfall | 10 mm | 68 mm | 20 mm |
| Wind | 21.3 km/h | 19.3 km/h | 17.8 km/h |
| Humidity | 64% | 66% | 69% |
| Rainy days | 2 days | 17 days | 4 days |
| Dry days | 29 days | 13 days | 27 days |
Planning a trip to Kefalonia? Discover the best time to visit
Kefalonia in September - FAQ
Kefalonia water temperatures in September
The average water temperature of the Mediterranean Sea near Kefalonia in September is 24.2 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Kefalonia in September?
- The average water temperature in Kefalonia in September is 24.2 °C.
- Can you swim in Kefalonia in September?
- Ideal conditions for families and casual swimmers. You can stay in for long swims or reef explorations with no thermal protection required.
What to pack to Kefalonia in September?
As you prepare for your trip to Kefalonia in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Kefalonia, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Kefalonia
UV exposure in Kefalonia during September
Quick links
Where is Kefalonia?Get accurate weather forecasts for Kefalonia, located at latitude 38.122 and longitude 20.502. Stay updated with localized weather information tailored for Kefalonia.