January in Syros: mixed conditions, plan around the weather
Trade-offs · 6/10January averages 14°C (56°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 97 mm, so plan one flexible day in three; you still get almost no days with 6+ hours of sunshine and 9.7 hours of daylight.
It scores 6/10 here, 11th of 12 months, against 9.6/10 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? April scores 3.6 points higher here — enough to change the trip.
February holds up well in Syros — 9th best month
Good · 7.3/10February averages 13°C (56°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 58 mm, so plan one flexible day in three; you still get about 6 days with 6+ hours of sunshine and 10.6 hours of daylight.
It scores 7.3/10 here, 9th of 12 months, against 9.6/10 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? April scores 2.3 points higher here — enough to change the trip.
March ranks 6th of 12 for Syros — one of the best windows
Best window · 8.5/10Temperatures hover around 14°C (57°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 50 mm of rain this month — a flexible day or two helps — with about 16 days with 6+ hours of sunshine and 11.7 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Syros at 8.5/10 (6th of 12), just behind April at 9.6/10.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
April in Syros tops the year's climate scores
Best window · 9.6/10April averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 27 mm of rain — occasional showers rather than washed-out days — alongside about 27 days with 6+ hours of sunshine and 13 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Syros at 9.6/10 — the reference point every other month on this page is measured against.
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 layers you can shed by midday plus one warm layer for the evening.
May is one of the strongest months in Syros (2nd)
Best window · 9.6/10Temperatures hover around 19°C (66°F) — the kind of month where neither heat nor cold forces the schedule.
With around 22 mm of rain, any showers tend to pass through rather than settle in; about 31 days with 6+ hours of sunshine and 14 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Syros at 9.6/10 (2nd of 12), just behind April at 9.6/10.
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 layers you can shed by midday plus one warm layer for the evening.
June is one of the strongest months in Syros (3rd)
Best window · 9.1/10June averages 23°C (74°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rain is a non-issue at 11 mm for the month, with about 30 days with 6+ hours of sunshine and 14.6 hours of daylight to work with.
A 9.1/10 puts this among the year's best months in Syros (3rd of 12); only April scores higher, at 9.6/10.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection.
July in Syros: strong conditions, 7th of 12
Good · 8.2/10July averages 26°C (78°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rain is a non-issue at 5 mm for the month, with about 31 days with 6+ hours of sunshine and 14.3 hours of daylight to work with.
It scores 8.2/10 here, 7th of 12 months, against 9.6/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection.
August holds up well in Syros — 8th best month
Good · 7.8/10Days in August average 26°C (79°F) and humidity near 74% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
At just 9 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 13.4 hours of daylight.
That is 7.8/10 on the same scale — 8th of 12 months, versus 9.6/10 for the best month here.
Budget for mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
If your dates are flexible, April is materially better in Syros — 1.8 points higher on the same scale.
September in Syros — one of the year's strongest windows (5th)
Best window · 8.6/10At 25°C (76°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
With around 16 mm of rain, any showers tend to pass through rather than settle in; about 23 days with 6+ hours of sunshine and 12.2 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Syros at 8.6/10 (5th of 12), just behind April at 9.6/10.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection.
October in Syros — one of the year's strongest windows (4th)
Best window · 8.9/10October averages 21°C (70°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rain is a non-issue at 8 mm for the month, with about 14 days with 6+ hours of sunshine and 11 hours of daylight to work with.
A 8.9/10 puts this among the year's best months in Syros (4th of 12); only April scores higher, at 9.6/10.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, a hat and real sun protection.
November in Syros — workable with trade-offs
Trade-offs · 6.9/10November 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.
Rainfall runs 75 mm, so plan one flexible day in three; you still get about 4 days with 6+ hours of sunshine and 9.9 hours of daylight.
It scores 6.9/10 here, 10th of 12 months, against 9.6/10 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? April scores 2.7 points higher here — enough to change the trip.
December in Syros — workable with trade-offs
Trade-offs · 5.9/10Temperatures hover around 16°C (61°F) — the kind of month where neither heat nor cold forces the schedule.
109 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 5.9/10 on the same scale — 12th of 12 months, versus 9.6/10 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, April is materially better in Syros — 3.7 points higher on the same scale.
