Sinaia in May sees moderate daytime temperatures of 18°C (64°F) and nighttime lows of 7°C (45°F). Rainfall is fairly high this month at around 140 mm (5.5 in), so pack a rain jacket to stay dry.
If you prefer enjoying temperate temperatures and rain-free days, June, July, August and September typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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Pick a month to see the average temperature, rainfall and sunshine in Sinaia - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Sinaia typically stay consistent throughout May, with daily highs averaging around 18°C (64°F). Nights are cold, with lows typically ranging from -1°C (30°F) to 3°C (37°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 Sinaia spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on weather observations in Sinaia 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 Sinaia 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
See the full Sinaia 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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