May in Iaşi averages 23°C (73°F) during the day and 12°C (54°F) at night. Quite a bit of rainfall is typical this month, with around 65 mm (2.6 in) on average. An umbrella is a good idea.
If you're inclined towards comfortable temperatures and drier conditions, May is a good time to visit Iaşi.
Min Temperature
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Pick a month to see the average temperature, rainfall and sunshine in Iaşi - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Iaşi typically stay consistent throughout May, with daily highs averaging around 23°C (73°F). Nights are cool, with lows typically ranging from 9°C (48°F) to 13°C (55°F).
50-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 Iaşi spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Iaşi between 1976 and 2026, these are the recorded extremes during May.
Find out more about the weather in Romania and which places have the best travel conditions in this month. See all of Romania 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).
For Iaşi in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Iaşi climate overview or explore weather in Romania.
Where to go in May - average daytime high across popular destinations.
Bucharest
24°C (75°F) Timişoara24°C (75°F) Mamaia
21°C (70°F) Constanţa21°C (70°F) Cluj-Napoca21°C (70°F) Eforie Nord21°C (70°F) Sibiu
20°C (68°F) Braşov
19°C (66°F) Need travel inspiration? Check out our bucket list articles and be inspired.
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