January in Kythnos — the hardest end of the year
Hardest · 2.2/10Temperatures hover around 13°C (56°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 76 mm of rain this month — a flexible day or two helps — with almost no days with 6+ hours of sunshine and 9.7 hours of daylight to work around it.
That is 2.2/10 on the same scale — 12th of 12 months, versus 9.9/10 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, June is materially better in Kythnos — 7.7 points higher on the same scale.
February in Kythnos — off-season conditions
Hardest · 3.4/10Temperatures hover around 13°C (56°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 60 mm of rain this month — a flexible day or two helps — with about 6 days with 6+ hours of sunshine and 10.6 hours of daylight to work around it.
That is 3.4/10 on the same scale — 10th of 12 months, versus 9.9/10 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 packable rain layer.
If your dates are flexible, June is materially better in Kythnos — 6.5 points higher on the same scale.
March in Kythnos — middling scores, decent value
Trade-offs · 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 51 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 5/10 here, 8th of 12 months, against 9.9/10 in the destination's best month.
Plan for 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? June scores 4.9 points higher here — enough to change the trip.
April holds up well in Kythnos — 7th best month
Good · 7.1/10Temperatures hover around 17°C (62°F) — the kind of month where neither heat nor cold forces the schedule.
At just 14 mm for the month, rain will not shape your plans; you get about 27 days with 6+ hours of sunshine and 13 hours of daylight.
That is 7.1/10 on the same scale — 7th of 12 months, versus 9.9/10 for the best month here.
Expect 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, June is materially better in Kythnos — 2.8 points higher on the same scale.
May in Kythnos: strong conditions, 5th of 12
Good · 8.1/10May averages 19°C (66°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 19 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 14 daylight hours.
It scores 8.1/10 here, 5th of 12 months, against 9.9/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection.
Flexible dates? June scores 1.8 points higher here — enough to change the trip.
June: the best month of the year in Kythnos
Best window · 9.9/10With 24°C (75°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 8 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 the top-ranked month of the year for Kythnos at 9.9/10 — the reference point every other month on this page is measured against.
Budget for 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 ranks 2nd of 12 for Kythnos — one of the best windows
Best window · 9.9/10Days in July average 26°C (80°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 14.3 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Kythnos at 9.9/10 (2nd of 12), just behind June at 9.9/10.
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 ranks 3rd of 12 for Kythnos — one of the best windows
Best window · 9.9/10August averages 27°C (80°F) and humidity near 71%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rain is a non-issue at 12 mm for the month, with about 31 days with 6+ hours of sunshine and 13.4 hours of daylight to work with.
A 9.9/10 puts this among the year's best months in Kythnos (3rd of 12); only June scores higher, at 9.9/10.
Plan for 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 ranks 4th of 12 for Kythnos — one of the best windows
Best window · 9.9/10September averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 24 mm of rain — occasional showers rather than washed-out days — alongside about 23 days with 6+ hours of sunshine and 12.2 daylight hours.
A 9.9/10 puts this among the year's best months in Kythnos (4th of 12); only June scores higher, at 9.9/10.
Plan for peak pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection.
October holds up well in Kythnos — 6th best month
Good · 8/10With 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.
At just 10 mm for the month, rain will not shape your plans; you get about 14 days with 6+ hours of sunshine and 11 hours of daylight.
That is 8/10 on the same scale — 6th of 12 months, versus 9.9/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection.
If your dates are flexible, June is materially better in Kythnos — 1.9 points higher on the same scale.
November in Kythnos — the hardest end of the year
Hardest · 4.7/10Temperatures hover around 19°C (65°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 55 mm of rain this month — a flexible day or two helps — with about 4 days with 6+ hours of sunshine and 9.9 hours of daylight to work around it.
That is 4.7/10 on the same scale — 9th of 12 months, versus 9.9/10 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 packable rain layer.
If your dates are flexible, June is materially better in Kythnos — 5.2 points higher on the same scale.
December in Kythnos: expect compromises
Hardest · 2.6/10December 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.
Rainfall runs 75 mm, so plan one flexible day in three; you still get almost no days with 6+ hours of sunshine and 9.4 hours of daylight.
It scores 2.6/10 here, 11th of 12 months, against 9.9/10 in the destination's best month.
Figure on 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 packable rain layer.
Flexible dates? June scores 7.3 points higher here — enough to change the trip.
