January in Alonnisos — the hardest end of the year
Hardest · 4.9/10January averages 10°C (50°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 23 sunny days and 9.8 hours of daylight.
It scores 4.9/10 here, 11th of 12 months, against 10/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Alonnisos — 5.1 points higher on the same scale.
February in Alonnisos — workable with trade-offs
Trade-offs · 5.4/10February averages 10°C (50°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 65 mm, so plan one flexible day in three; you still get about 21 sunny days and 10.7 hours of daylight.
It scores 5.4/10 here, 9th of 12 months, against 10/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Alonnisos — 4.6 points higher on the same scale.
March in Alonnisos — workable with trade-offs
Trade-offs · 5.5/10March averages 11°C (52°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 70 mm, so plan one flexible day in three; you still get about 26 sunny days and 12 hours of daylight.
It scores 5.5/10 here, 8th of 12 months, against 10/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Alonnisos — 4.5 points higher on the same scale.
April in Alonnisos — workable with trade-offs
Trade-offs · 6/10April 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 49 mm, so plan one flexible day in three; you still get about 28 sunny days and 13.3 hours of daylight.
It scores 6/10 here, 7th of 12 months, against 10/10 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 packable rain layer.
If your dates are flexible, June is materially better in Alonnisos — 4 points higher on the same scale.
May in Alonnisos — reliably good (5th best month)
Good · 7.5/10May averages 18°C (64°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 40 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 14.3 daylight hours.
It scores 7.5/10 here, 5th of 12 months, against 10/10 in the destination's best month.
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 Alonnisos — 2.5 points higher on the same scale.
June in Alonnisos — the year's strongest window
Best window · 10/10June averages 24°C (74°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 20 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 14.9 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Alonnisos at 10/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection.
July in Alonnisos — the year's strongest window
Best window · 10/10July averages 27°C (80°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 32 mm of rain — occasional showers rather than washed-out days — alongside about 31 sunny days and 14.6 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Alonnisos at 10/10 — 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 Alonnisos — the year's strongest window
Best window · 10/10August averages 26°C (79°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rain is a non-issue at 15 mm for the month, with about 31 sunny days and 13.7 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Alonnisos at 10/10 — 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.
September in Alonnisos — the year's strongest window
Best window · 8.6/10September averages 22°C (72°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 86 mm, so plan one flexible day in three; you still get about 28 sunny days and 12.4 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Alonnisos at 8.6/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
October in Alonnisos — reliably good (6th best month)
Good · 7.4/10October averages 18°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 43 mm of rain — occasional showers rather than washed-out days — alongside about 27 sunny days and 11.2 daylight hours.
It scores 7.4/10 here, 6th of 12 months, against 10/10 in the destination's best month.
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 Alonnisos — 2.6 points higher on the same scale.
November in Alonnisos — workable with trade-offs
Trade-offs · 5.3/10November 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.
Rainfall runs 77 mm, so plan one flexible day in three; you still get about 24 sunny days and 10 hours of daylight.
It scores 5.3/10 here, 10th of 12 months, against 10/10 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 packable rain layer.
If your dates are flexible, June is materially better in Alonnisos — 4.7 points higher on the same scale.
December in Alonnisos — the hardest end of the year
Hardest · 4.7/10December averages 12°C (53°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 106 mm this is a genuinely wet month: about 22 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.7/10 here, 12th of 12 months, against 10/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
If your dates are flexible, June is materially better in Alonnisos — 5.3 points higher on the same scale.
