Thinking of visiting Sinaia in September? Expect pleasant temperatures reaching 19°C (66°F) during the day, dropping to 8°C (46°F) at night, and note that quite a bit of rainfall is likely.
If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
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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 drop from around 14°C (57°F) at the start of September to approximately 10°C (50°F) by the end. Nights are cold, with lows typically ranging from 1°C (34°F) to 5°C (41°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 50 years of weather observations in Sinaia between 1976 and 2026, these are the recorded extremes.
Find out more about the weather in Romania and which places have the best travel conditions in this month. See all of Romania in September →
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 September, 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.
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 September - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
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