January in Kefalonia — the hardest end of the year
Hardest · 4.5/10January averages 15°C (59°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.5/10 here, 10th of 12 months, against 9.2/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, May is materially better in Kefalonia — 4.7 points higher on the same scale.
February in Kefalonia — the hardest end of the year
Hardest · 4.5/10February averages 16°C (61°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.5/10 here, 11th of 12 months, against 9.2/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, May is materially better in Kefalonia — 4.7 points higher on the same scale.
March in Kefalonia — workable with trade-offs
Trade-offs · 6.5/10March averages 19°C (66°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 6.5/10 here, 9th of 12 months, against 9.2/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, May is materially better in Kefalonia — 2.7 points higher on the same scale.
April in Kefalonia — reliably good (6th best month)
Good · 8/10April averages 23°C (73°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 8/10 here, 6th of 12 months, against 9.2/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
May in Kefalonia — the year's strongest window
Best window · 9.2/10May averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 14.2 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Kefalonia at 9.2/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
June in Kefalonia — the year's strongest window
Best window · 9.2/10June averages 30°C (86°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 14.5 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Kefalonia at 9.2/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
July in Kefalonia — the year's strongest window
Best window · 9.2/10July averages 32°C (90°F) at 60% humidity — genuinely punishing heat. Anything outdoors needs to happen before 10am.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 14.2 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Kefalonia at 9.2/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
August in Kefalonia — the year's strongest window
Best window · 9.2/10August averages 31°C (88°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 13.3 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Kefalonia at 9.2/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
September in Kefalonia — the year's strongest window
Best window · 9.2/10September averages 28°C (82°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 23 sunny days and 12 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Kefalonia at 9.2/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
October in Kefalonia — reliably good (7th best month)
Good · 8/10October averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 8/10 here, 7th of 12 months, against 9.2/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
November in Kefalonia — reliably good (8th best month)
Good · 8/10November averages 20°C (68°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 8/10 here, 8th of 12 months, against 9.2/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
December in Kefalonia — the hardest end of the year
Hardest · 4.5/10December averages 17°C (63°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 110 mm this is a genuinely wet month: about 19 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.5/10 here, 12th of 12 months, against 9.2/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, May is materially better in Kefalonia — 4.7 points higher on the same scale.
