May · Greece
Best time to visit Alonnisos in May Weather, crowds & prices
Weather in Alonnisos in May
Average temperature 18°C, 40 mm of rain, about 30 days with 6+ hours of sunshine and 70% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
7.5/10
Ranked #5 of 12 months
- Avg temp
- 18°C
- Rainfall
- 40 mm
- Humidity
- 70%
- Days with 6h+ sun
- 30
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Alonnisos scores 7.5/10 for beach and coastal travel - an above-average month (#5 of 12). Expect around 18°C, 40 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Alonnisos is a Sporades island with a hilltop old village, pine-covered coast and a marine park for monk seals.
May in Alonnisos — reliably good (5th best month)
May 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 days with 6+ hours of sunshine and 14.3 daylight hours.
It scores 7.5/10 here, 5th of 12 months, against 10/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening.
Figure on mid-season pricing, with crowds are moderate.
Flexible dates? June scores 2.5 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Alonnisos in May?
- In May, Alonnisos averages 18°C, 40 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 7.5/10.
- Is May a good time to visit Alonnisos?
- May earns a 7.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Alonnisos in May?
- Expect about 40 mm of rain in May. Average humidity is 70% and there are about 30 days with 6+ hours of sunshine.
Curated in Alonnisos
Tickets & experiences
Things to do in Alonnisos
Alonnisos, Greece. Live activities and tours from GetYourGuide, matched to this destination.