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May in Horta brings pleasant temperatures around 18°C (64°F) during the day, dropping to 16°C (61°F) at night, with quite a bit of rainfall expected, averaging around 64 mm (2.5 in) for the month.
If your ideal day consists of dry skies and pleasant temperatures, June, July, August, September and November typically offer the best circumstances for Horta.
Pick a month to see the average temperature, rainfall and sunshine in Horta - and find the best time to visit.
48-year average (1976-2025)
Based on our historical records, temperatures in Horta typically stay consistent throughout May, with daily highs averaging around 18°C (64°F). Nights are pleasant, with lows typically ranging from 14°C (57°F) to 16°C (61°F).
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Horta spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
The extremes listed below come from historical weather data collected in Horta from 1999 through 2026.
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in May →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full Horta climate overview or explore weather in Portugal.
Where to go in May - average daytime high across popular destinations.
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