Sofia is warmest in August, averaging 30° by day and 15° at night. The wettest month is December with 102 mm, and the year brings about 791 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 3° | -6° | 78 mm | 9.2 h | Cool |
| February | 7° | -4° | 48 mm | 10.3 h | Cool |
| March | 9° | -1° | 62 mm | 11.7 h | Cool |
| April | 14° | 4° | 63 mm | 13.2 h | Mild |
| May | 20° | 9° | 78 mm | 14.4 h | Sightseeing |
| June | 25° | 13° | 96 mm | 15.1 h | Sightseeing |
| July | 30° | 15° | 53 mm | 14.8 h | Beach weather |
| August | 30° | 15° | 59 mm | 13.7 h | Beach weather |
| September | 24° | 12° | 45 mm | 12.3 h | Sightseeing |
| October | 18° | 6° | 50 mm | 10.8 h | Sightseeing |
| November | 12° | 1° | 57 mm | 9.5 h | Cool |
| December | 6° | -3° | 102 mm | 8.9 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: July and August — highs around 30°, nights no colder than 15°, and at most 59 mm of rain in a month.
Walking the city: May, June, September and October — highs of 18–25° and no more than 96 mm of rain a month.