Weather in Sofia in September 2025
Average weather
Average temperature in Sofia in September
Going from a maximum of +90°F during the day to a minimum of +48°F during the night, the temperature in September averages around +77°F.
The average maximum temperature goes down 13% by the end of the month, compared with the beginning of the month, from +81°F to +75°F.
Is Sofia warm or cold in September?
Sofia is typically warm in September.
Maximum temperatures go down compared to the previous month from +82°F to +73°F. The minimum temperature also goes down from +59°F to +52°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Sofia:
Climate in Sofia in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +82°F | +73°F | +63°F | ||||
| Min. temperature | ||||||
| +43°F | +30°F | +23°F | ||||
| Max. temperature | ||||||
| +127°F | +117°F | +91°F | ||||
| Rainfall | ||||||
| 39 mm | 36 mm | 40 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 63% | 67% | 74% | ||||
| Air pressure | ||||||
| 1015 HPa | 1017 HPa | 1019 HPa | ||||
| Sunny days | ||||||
| 16 | 14 | 12 | ||||
| Cloudy days | ||||||
| 2 | 5 | 10 | ||||
| Rainy days | ||||||
| 8 | 9 | 8 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +82°F in the day, the average maximum temperature lowers to +73°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 39 mm to 36 mm. Humidity rises from 63% to 67%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 16 sunny days in August to 14 in September.
October brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Sofia is gradually increasing during September, going from 1 m/s to 2 m/s over the course of the month.
Rain
How was the weather last September in Sofia?
Climate Change Over the Years
The climate in Sofia in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1991 (+58°F) and the highest in 2014 (+66°F). The driest year was 1993 with only 278 mm of rainfall, and the wettest year was 2013 with 1194 mm.
FAQ
Is September a good time to visit Sofia?
Can you sunbathe in Sofia in September?
Is Sofia rainy in September?
Is it sunny in Sofia in September?
Other cities in Bulgaria
Monthly weather in Sofia
Source of the data
For this page, we’ve looked at the typical weather in Sofia, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.