When to go · Ios
Ios, month by month
The best months for Ios: Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Mar, Nov, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Nov–Mar (most businesses shut); mid-Aug for Meltemi wind and crowds.14 °C (57 °F) / 9 °C (48 °F), 9 rain days57 °F (14 °C) / 48 °F (9 °C), 9 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Mar (most businesses shut); mid-Aug for Meltemi wind and crowds.14 °C (57 °F) / 9 °C (48 °F), 8 rain days57 °F (14 °C) / 48 °F (9 °C), 8 rain daysCrowds: Low
- MarchAvoidListed as a month to avoid: Nov–Mar (most businesses shut); mid-Aug for Meltemi wind and crowds.16 °C (61 °F) / 10 °C (50 °F), 6 rain days61 °F (16 °C) / 50 °F (10 °C), 6 rain daysCrowds: Low
- AprilGoodOutside the best window (Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife). Across Greece: Wildflowers and good walking; Orthodox Easter (12 April 2026, 2 May 2027) fills ferries and rooms. Islands start reopening.19 °C (66 °F) / 12 °C (54 °F), 4 rain days66 °F (19 °C) / 54 °F (12 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- MayGoodOutside the best window (Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife). Across Greece: Warm, green and open; sea cool but swimmable late in the month. Best for sightseeing and hiking.23 °C (73 °F) / 15 °C (59 °F), 2 rain days73 °F (23 °C) / 59 °F (15 °C), 2 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Ios's best window: Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife.27 °C (81 °F) / 19 °C (66 °F), 1 rain days81 °F (27 °C) / 66 °F (19 °C), 1 rain daysCrowds: High
- JulyGreatInside Ios's best window: Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife.29 °C (84 °F) / 22 °C (72 °F), 0 rain days84 °F (29 °C) / 72 °F (22 °C), 0 rain daysCrowds: High
- AugustGreatInside Ios's best window: Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife.29 °C (84 °F) / 22 °C (72 °F), 0 rain days84 °F (29 °C) / 72 °F (22 °C), 0 rain daysCrowds: High · 1 festival or holiday
- SeptemberGreatInside Ios's best window: Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife.26 °C (79 °F) / 20 °C (68 °F), 1 rain days79 °F (26 °C) / 68 °F (20 °C), 1 rain daysCrowds: Medium
- OctoberGoodOutside the best window (Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife). Across Greece: Still swimmable in Crete and Rhodes; many Cyclades businesses close after mid-month.22 °C (72 °F) / 17 °C (63 °F), 4 rain days72 °F (22 °C) / 63 °F (17 °C), 4 rain daysCrowds: Low
- NovemberAvoidListed as a month to avoid: Nov–Mar (most businesses shut); mid-Aug for Meltemi wind and crowds.18 °C (64 °F) / 13 °C (55 °F), 7 rain days64 °F (18 °C) / 55 °F (13 °C), 7 rain daysCrowds: Low
- DecemberAvoidListed as a month to avoid: Nov–Mar (most businesses shut); mid-Aug for Meltemi wind and crowds.15 °C (59 °F) / 11 °C (52 °F), 9 rain days59 °F (15 °C) / 52 °F (11 °C), 9 rain daysCrowds: Low
Compare two months
Weather, crowds and prices for any two months in Ios, side by side.
Verdict
Jun: Great
Jul: Great
Daytime high
Jun: 27 °C (81 °F)81 °F (27 °C)
Jul: 29 °C (84 °F)84 °F (29 °C)
Night low
Jun: 19 °C (66 °F)66 °F (19 °C)
Jul: 22 °C (72 °F)72 °F (22 °C)
Rain days
Jun: 1
Jul: 0 (better)
Crowds
Jun: High
Jul: High
Prices
Jun: High
Jul: High
Festivals listed
Jun: 0
Jul: 0
June: Inside Ios's best window: Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife.
July: Inside Ios's best window: Jun and Sep (warm sea, fewer people); Jul–Aug for nightlife.
Ios: figures are long-term averages from this guide, not a forecast.