Island in South Aegean, Greece
Ios weather by month and the best time to visit
When to go to Ios
June and September are warm and lively without the peak crush; July–August is hot, loud and full. Most venues close from late October to May.
Ios weather by month
Average daily high, rainfall and conditions.
- Jan14°97 mm
- Feb14°83 mm
- Mar15°49 mm
- Apr16°26 mm
- May19°18 mm
- Jun23°6 mm
- Jul26°2 mm
- Aug26°3 mm
- Sep24°19 mm
- Oct21°49 mm
- Nov18°68 mm
- Dec15°93 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 14°C57°F | 12°C54°F | 97 mm | 75% | Cool |
| February | 14°C56°F | 12°C54°F | 83 mm | 76% | Cool |
| March | 15°C58°F | 13°C56°F | 49 mm | 76% | Cool |
| April | 16°C61°F | 15°C58°F | 26 mm | 77% | Cool |
| May | 19°C67°F | 18°C64°F | 18 mm | 78% | Pleasant |
| June | 23°C74°F | 21°C71°F | 6 mm | 76% | Pleasant |
| July | 26°C78°F | 24°C74°F | 2 mm | 74% | Pleasant |
| August | 26°C78°F | 24°C75°F | 3 mm | 75% | Pleasant |
| September | 24°C75°F | 22°C72°F | 19 mm | 74% | Pleasant |
| October | 21°C70°F | 20°C67°F | 49 mm | 75% | Pleasant |
| November | 18°C64°F | 16°C62°F | 68 mm | 76% | Pleasant |
| December | 15°C59°F | 14°C56°F | 93 mm | 76% | Cool |
Best months across Greece
| Place | Best months | Warmest month |
|---|---|---|
| Athens | Apr–Jun, Sep–Oct | Jul (33°C) |
| Santorini | May–Jun, Sep–Oct | Aug (26°C) |
| Mykonos | May–Jun, Sep | Aug (25°C) |
| Crete | May–Jun, Sep–Oct | Aug (28°C) |
| Rhodes | May–Jun, Sep–Oct | Aug (32°C) |
| Corfu | May–Jun, Sep–Oct | Aug (30°C) |
| Thessaloniki | Apr–Jun, Sep–Oct | Jul (34°C) |
| Naxos | May–Jun, Sep–Oct | Aug (27°C) |
| Paros | May–Jun, Sep–Oct | Aug (27°C) |
| Zakynthos | May–Jun, Sep–Oct | Aug (29°C) |
| Chania | May–Jun, Sep–Oct | Jul (30°C) |
| Milos | May–Jun, Sep–Oct | Aug (26°C) |
| Kos | May–Jun, Sep–Oct | Aug (32°C) |
| Kefalonia | May–Jun, Sep–Oct | Aug (29°C) |
| Meteora | Apr–May, Sep–Oct | Jul (36°C) |
| Halkidiki | Jun–Sep | Jul (29°C) |
| Ios | Jun–Sep | Aug (26°C) |
| Lefkada | May–Jun, Sep–Oct | Aug (31°C) |
| Nafplio | Apr–Jun, Sep–Oct | Jul (36°C) |
| Skiathos | Jun–Jul, Sep | Aug (28°C) |
| Hydra | May–Jun, Sep–Oct | Aug (28°C) |
| Peloponnese | Apr–Jun, Sep–Oct | Aug (33°C) |
| Thassos | Jun–Jul, Sep | Aug (33°C) |
Quick answers
What is the best month to visit Ios?
Jun–Sep. June and September are warm and lively without the peak crush; July–August is hot, loud and full. Most venues close from late October to May.
When is the rainy season in Ios?
Rain peaks in January with about 97 mm. No month averages 150 mm or more.
What is the hottest month in Ios?
August, with average highs of 26°C (78°F).
How cold does Ios get?
The coolest nights are in January, averaging 12°C (54°F).
More about Ios
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.9°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.