Monthly climate guide
Kefalonia weather in May
Expect warm weather in Kefalonia in May: afternoons reach about 21°C (70°F), while nights drop to around 18°C (64°F). Around 24 mm of rain falls over the month (fairly dry), and skies are a mix of sun and cloud. Daytime highs are 3°C warmer than April and 4°C cooler than June.
What stands out in May
- It's one of the drier months, with about 64% less rain than Kefalonia's average.
- Temperatures are climbing — June is around 4°C warmer.
- Kefalonia is usually about 2°C cooler than Kalamata, 190 km away, in May.
- Days and nights are close, only about 3°C apart.
Avg high
21°C
70°F
Avg low
18°C
64°F
Rainfall
24 mm
fairly dry
Humidity
76%
relative
Sky
48%
cloud · a mix of sun and cloud
Kefalonia weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 11°C / 53°F | 111 mm | 74% | 66% |
| February | 14°C / 57°F | 12°C / 53°F | 93 mm | 75% | 65% |
| March | 15°C / 60°F | 13°C / 55°F | 74 mm | 77% | 59% |
| April | 18°C / 64°F | 15°C / 58°F | 33 mm | 76% | 51% |
| May | 21°C / 70°F | 18°C / 64°F | 24 mm | 76% | 48% |
| June | 25°C / 78°F | 22°C / 71°F | 23 mm | 73% | 28% |
| July | 28°C / 83°F | 25°C / 76°F | 10 mm | 70% | 14% |
| August | 29°C / 85°F | 26°C / 78°F | 14 mm | 67% | 16% |
| September | 27°C / 80°F | 24°C / 75°F | 72 mm | 68% | 33% |
| October | 23°C / 73°F | 20°C / 68°F | 101 mm | 72% | 47% |
| November | 19°C / 67°F | 17°C / 63°F | 115 mm | 72% | 59% |
| December | 16°C / 60°F | 13°C / 56°F | 134 mm | 72% | 61% |
What to pack for May
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
Is May a good time to visit Kefalonia?
Our Kefalonia guide recommends: June and September for warm weather and sea; spring is green and good for hiking.
Visit Melissani around midday, when sunlight shines straight into the cave.
Best time to visit Kefalonia →Other Greece cities in May
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Kefalonia weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/greece/kefalonia/may
<a href="https://weathercompare.eu/weather/greece/kefalonia/may">Kefalonia weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/greece/kefalonia" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Kefalonia weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/greece/kefalonia/may">Kefalonia weather in May</a> – WeatherCompare</p>
Kefalonia in May: quick answers
Is May a good time to visit Kefalonia?
Yes. May is one of the best months for Kefalonia, with highs around 21°C and about 24 mm of rain.
How warm is Kefalonia in May?
Average highs are about 21°C (70°F) and average lows about 18°C (64°F), based on 10 years of daily data.
Does it rain a lot in Kefalonia in May?
Kefalonia typically gets around 24 mm of rain in May — fairly dry.
When is the best time to visit Kefalonia?
June and September for warm weather and sea; spring is green and good for hiking.
Figures are long-term averages for the area around Kefalonia (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.