January in Kefalonia: expect compromises
Hardest · 1.4/10Temperatures hover around 14°C (57°F) — the kind of month where neither heat nor cold forces the schedule.
132 mm of rain signals a properly wet month, with only almost no days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 1.4/10 on the same scale — 12th of 12 months, versus 10/10 for the best month here.
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, August is materially better in Kefalonia — 8.6 points higher on the same scale.
February in Kefalonia — the hardest end of the year
Hardest · 3.5/10Temperatures hover around 13°C (56°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 62 mm of rain this month — a flexible day or two helps — with about 7 days with 6+ hours of sunshine and 10.6 hours of daylight to work around it.
That is 3.5/10 on the same scale — 9th of 12 months, versus 10/10 for the best month here.
Budget for 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 packable rain layer.
If your dates are flexible, August is materially better in Kefalonia — 6.5 points higher on the same scale.
March in Kefalonia — the hardest end of the year
Hardest · 4.5/10March averages 14°C (57°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 80 mm, so plan one flexible day in three; you still get about 16 days with 6+ hours of sunshine and 11.7 hours of daylight.
It scores 4.5/10 here, 8th of 12 months, against 10/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Flexible dates? August scores 5.5 points higher here — enough to change the trip.
April in Kefalonia — workable with trade-offs
Trade-offs · 6.7/10Temperatures hover around 16°C (61°F) — the kind of month where neither heat nor cold forces the schedule.
With around 38 mm of rain, any showers tend to pass through rather than settle in; about 26 days with 6+ hours of sunshine and 13 hours of daylight fill the rest.
That is 6.7/10 on the same scale — 6th of 12 months, versus 10/10 for the best month here.
Budget for mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening.
If your dates are flexible, August is materially better in Kefalonia — 3.3 points higher on the same scale.
May in Kefalonia — reliably good (5th best month)
Good · 8.1/10May averages 20°C (67°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 40 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 14.1 daylight hours.
It scores 8.1/10 here, 5th of 12 months, against 10/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection.
Flexible dates? August scores 1.9 points higher here — enough to change the trip.
June ranks 2nd of 12 for Kefalonia — one of the best windows
Best window · 9.9/10With 25°C (76°F) on average, June delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
At just 14 mm for the month, rain will not shape your plans; you get about 30 days with 6+ hours of sunshine and 14.6 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Kefalonia at 9.9/10 (2nd of 12), just behind August at 10/10.
Expect peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection.
July is one of the strongest months in Kefalonia (3rd)
Best window · 9.9/10Days in July average 28°C (82°F) — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
At just 4 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 14.4 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Kefalonia at 9.9/10 (3rd of 12), just behind August at 10/10.
Budget for 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 · 10/10August averages 28°C (82°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 24 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 13.5 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Kefalonia at 10/10 — the reference point every other month on this page is measured against.
Figure on peak pricing, with 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.
September in Kefalonia — one of the year's strongest windows (4th)
Best window · 9.2/10September averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 63 mm, so plan one flexible day in three; you still get about 22 days with 6+ hours of sunshine and 12.2 hours of daylight.
A 9.2/10 puts this among the year's best months in Kefalonia (4th of 12); only August scores higher, at 10/10.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
October in Kefalonia — middling scores, decent value
Trade-offs · 6.5/10With 22°C (71°F) on average, October delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
102 mm of rain signals a properly wet month, with only about 12 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 6.5/10 on the same scale — 7th of 12 months, versus 10/10 for the best month here.
Budget for 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, August is materially better in Kefalonia — 3.5 points higher on the same scale.
November in Kefalonia — the hardest end of the year
Hardest · 2.9/10Temperatures hover around 19°C (66°F) — the kind of month where neither heat nor cold forces the schedule.
157 mm of rain signals a properly wet month, with only about 1 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 2.9/10 on the same scale — 10th of 12 months, versus 10/10 for the best month here.
Budget for 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, August is materially better in Kefalonia — 7.1 points higher on the same scale.
December in Kefalonia — the hardest end of the year
Hardest · 1.6/10December averages 15°C (60°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
At 126 mm this is a genuinely wet month: almost no days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 1.6/10 here, 11th of 12 months, against 10/10 in the destination's best month.
Plan for low-season pricing, with 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.
Flexible dates? August scores 8.4 points higher here — enough to change the trip.
