May · Greece
Best time to visit Ios in May Weather, crowds & prices
Weather in Ios in May
Average temperature 19°C, 18 mm of rain, about 31 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
8.2/10
Ranked #6 of 12 months
- Avg temp
- 19°C
- Rainfall
- 18 mm
- Humidity
- 78%
- Days with 6h+ sun
- 31
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Ios scores 8.2/10 for beach and coastal travel - an above-average month (#6 of 12). Expect around 19°C, 18 mm of rain, and roughly 31 days with 6+ hours of sunshine this month.
Ios mixes a hilltop Cycladic town, sandy Mylopotas beach and a famously busy summer nightlife scene.
May holds up well in Ios — 6th best month
With 19°C (67°F) on average, May delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
With around 18 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.
That is 8.2/10 on the same scale — 6th of 12 months, versus 9.8/10 for the best month here.
Pack light clothing, swimwear and real sun protection.
Budget for mid-season pricing, and crowds are moderate.
If your dates are flexible, June is materially better in Ios — 1.6 points higher on the same scale.
Frequently asked
- What is the weather like in Ios in May?
- In May, Ios averages 19°C, 18 mm of rain, and about 31 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is May a good time to visit Ios?
- May earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Ios in May?
- Expect about 18 mm of rain in May. Average humidity is 78% and there are about 31 days with 6+ hours of sunshine.
Curated in Ios
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Ios, Greece. Live activities and tours from GetYourGuide, matched to this destination.