With daytime temperatures of 23°C (73°F) and nighttime lows of 11°C (52°F), September in Bacău brings high temperatures during the day. The excellent weather makes it an appealing time to visit.
If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August and September typically offer the best circumstances for Bacău.
Min Temperature
Max Temperature
Chance of Rain
Precipitation
Rainy days
Pick a month to see the average temperature, rainfall and sunshine in Bacău - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Bacău typically drop from around 24°C (75°F) at the start of September to approximately 20°C (68°F) by the end. 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 Bacău 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 Bacău from 1976 through 2026.
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).
Pleasant temperatures in September 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 Bacău 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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