Sofia records about 581mm of rain across roughly 97 wet days a year, which is a 27% chance on an average day. June is the wettest month at 75mm (13% of the annual total) and January the driest at 33mm. Local rain type: thunderstorms. Sofia gets moderate rain with summer thunderstorms. The surrounding mountains create rapid weather changes — layers are essential.
Chance of rain on an average day: 27%
Rainfall climatology for Sofia. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 581mm |
| Rain days per year | 97 |
| Odds on an average day | 27% |
| Wettest month | June — 75mm over 13 days |
| Driest month | January — 33mm over 6 days |
| Rain type | thunderstorms |
| Best dry window | September offers warm, dry "golden autumn" conditions. |
| Worst rain window | May and June bring the most rainfall as mountain-enhanced thunderstorms. |
June delivers 127% more rain than January (75mm vs 33mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 13% of the annual total, so rain in Sofia is spread through the year — there is no season you can rely on being dry.
Sofia rain arrives in short, heavy bursts — shelter and timing matter more than gear.
Rain falls on about 13 days in June against 6 in January — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 33mm | 6 | 20% | 3°C |
| February | 33mm | 6 | 20% | 3°C |
| March | 38mm | 7 | 23% | 7°C |
| April | 51mm | 9 | 30% | 12°C |
| May | 73mm | 13 | 43% | 19°C |
| June | 75mm | 13 | 43% | 24°C |
| July | 50mm | 9 | 30% | 28°C |
| August | 43mm | 7 | 23% | 28°C |
| September | 38mm | 7 | 23% | 24°C |
| October | 38mm | 7 | 23% | 19°C |
| November | 46mm | 8 | 27% | 12°C |
| December | 42mm | 7 | 23% | 7°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Sofia we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Sofia records rain on roughly 97 days a year — about a 27% chance on any given day — totalling around 581mm.
June, with about 75mm over 13 rain days. That is 13% of the entire year's rainfall in a single month.
January is the driest month at 33mm across roughly 6 days. September offers warm, dry "golden autumn" conditions.
Sofia gets moderate rain with summer thunderstorms. The surrounding mountains create rapid weather changes — layers are essential.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.