Climate of Siófok
Somogy County · monthly averages, precipitation, records and warming trend
Climate of Siófok in brief
Based on daily data from 2000–2025, the mean annual temperature in Siófok is 11.9 °C. Summer afternoons reach 27.2 °C on average in July, while January nights fall to -2.5 °C. The area receives about 677 mm of precipitation a year, spread over 114 days with at least 1 mm.
That makes Siófok the 151st warmest of 348 Hungarian towns: 0.2 °C warmer than the national town average (11.7 °C), and 9 mm drier (182nd by precipitation).
A typical year brings 21 hot days (at least 30 °C), 74 summer days (at least 25 °C) and 72 frost days (minimum below 0 °C). The warmest month is July, the coldest January.
The climate is warming: the 2000–2009 average was 11.5 °C, while 2016–2025 averaged 12.3 °C (+0.9 °C). The warmest year was 2024 (13.5 °C), the coldest 2005 (10.3 °C).
Records of the period: the highest daily maximum was 37.1 °C (20 July 2007), the lowest minimum -19.8 °C (15 December 2001), and the wettest day brought 55.2 mm (30 August 2025).
Current conditions: Siófok weather forecast · 7-day forecast · what to expect in September.
Climate table of Siófok
Click a month for the detailed monthly page.
| Month | Avg high | Avg low | Mean | Precip. | Wet days | Hot days | Frost days | Soil 0–7 cm |
|---|---|---|---|---|---|---|---|---|
| January | 3.7 °C | -2.5 °C | 0.5 °C | 45 mm | 9 | 0.0 | 22.0 | 1.1 °C |
| February | 6.3 °C | -1.4 °C | 2.3 °C | 45 mm | 9 | 0.0 | 16.9 | 2.3 °C |
| March | 11.1 °C | 1.9 °C | 6.5 °C | 49 mm | 10 | 0.0 | 9.8 | 6.1 °C |
| April | 16.7 °C | 6.8 °C | 11.9 °C | 45 mm | 9 | 0.0 | 0.8 | 11.8 °C |
| May | 21.1 °C | 11.7 °C | 16.6 °C | 71 mm | 12 | 0.1 | 0.0 | 16.8 °C |
| June | 25.3 °C | 16.1 °C | 21.0 °C | 66 mm | 11 | 4.0 | 0.0 | 21.4 °C |
| July | 27.2 °C | 18.0 °C | 22.8 °C | 63 mm | 10 | 8.2 | 0.0 | 23.6 °C |
| August | 27.0 °C | 17.8 °C | 22.5 °C | 62 mm | 8 | 7.8 | 0.0 | 23.4 °C |
| September | 21.6 °C | 13.2 °C | 17.3 °C | 70 mm | 9 | 0.6 | 0.0 | 18.0 °C |
| October | 16.2 °C | 8.4 °C | 12.1 °C | 56 mm | 8 | 0.0 | 0.3 | 12.5 °C |
| November | 10.1 °C | 3.6 °C | 6.7 °C | 54 mm | 9 | 0.0 | 5.2 | 7.0 °C |
| December | 4.6 °C | -0.8 °C | 1.8 °C | 52 mm | 10 | 0.0 | 16.9 | 2.4 °C |
| Year | 16.0 °C | 7.8 °C | 11.9 °C | 677 mm | 114 | 20.7 | 72.0 | 12.2 °C |
Temperature through the year
Bar: average low to average high; dot: monthly mean (°C).
Precipitation by month
Average monthly total (mm).
Warming in Siófok
Annual mean temperature; red: above the 2000–2025 average, blue: below.
Records
Highest temperature
37.1 °C 20 July 2007Lowest temperature
-19.8 °C 15 December 2001Wettest day
55.2 mm 30 August 2025Compared with nearby towns
| Town | Mean | Precip./year | Hot days | Frost days |
|---|---|---|---|---|
| Siófok | 11.9 °C | 677 mm | 21 | 72 |
| Balatonboglár | 12.3 °C | 706 mm | 18 | 54 |
| Balatonföldvár | 12.1 °C | 692 mm | 18 | 61 |
| Balatonlelle | 12.1 °C | 696 mm | 18 | 64 |
| Barcs | 12.4 °C | 751 mm | 28 | 70 |
| Csurgó | 12.2 °C | 784 mm | 24 | 64 |
| Fonyód | 12.1 °C | 713 mm | 21 | 66 |
| Igal | 12.0 °C | 724 mm | 23 | 70 |
| Kadarkút | 12.1 °C | 770 mm | 25 | 69 |
Weather in Siófok by month
Frequently asked questions
What is the climate like in Siófok?
The mean annual temperature is 11.9 °C with about 677 mm of precipitation a year. Summers are warm (27.2 °C average high in July), winters are cold (-2.5 °C average low in January).
What is the hottest month in Siófok?
July, with an average temperature of 22.8 °C and highs around 27.2 °C.
What is the wettest month in Siófok?
May, with 71 mm on average.
What was the highest temperature ever recorded in Siófok?
37.1 °C on 20 July 2007 (period 2000–2025).
When is the best time to visit Siófok?
Pleasant daytime temperatures (18–27 °C) are typical in May, June, August, September.
Source: Meteon's own daily dataset built from the ERA5-Land reanalysis (Copernicus / ECMWF), 2000–2025, about 9 km grid resolution. Values describe the town's surroundings and can differ slightly from a single weather station. Hot day: maximum ≥ 30 °C; summer day: ≥ 25 °C; frost day: minimum < 0 °C; wet day: ≥ 1 mm.