Keszthely weather in September
Averages, precipitation and records for every September since 2000
What is September like in Keszthely?
In September, daytime highs in Keszthely average 21.2 °C and night-time lows 13.1 °C, giving a monthly mean of 17.1 °C. Expect about 79 mm of precipitation on 10 wet days.
September is the 4th warmest month of the year here: 5.0 °C cooler than August and 4.9 °C warmer than October.
An average September brings 0.5 hot days (30 °C or more), 6.0 summer days (25 °C or more).
Compared with the September average of Hungarian towns (17.3 °C), Keszthely is 0.2 °C cooler — the 233rd warmest of 348.
The warmest September was in 2023 (19.8 °C), the coolest in 2001 (14.5 °C). The wettest was 2010 (177 mm), the driest 2009 (21 mm). September in 2016–2025 averaged 17.9 °C, compared with 16.3 °C in 2000–2009 (+1.5 °C).
September records: 32.9 °C (4 September 2024) and 5.6 °C (26 September 2018). The average topsoil temperature (0–7 cm) is 17.7 °C.
Planning a trip? Check the 7-day forecast for Keszthely and the current weather. See also the full climate of Keszthely and Hungary in September.
September mean temperature by year
Red: warmer than the average (17.1 °C), blue: cooler.
September precipitation by year
Monthly total (mm).
Every September in Keszthely, 2000–2025
Highlighted: the warmest and the coolest year. Click a year for its daily data.
| Year | Mean | Highest | Lowest | Precip. |
|---|---|---|---|---|
| September 2025 | 18.2 °C | 27.2 °C | 7.3 °C | 58 mm |
| September 2024 | 18.1 °C | 32.9 °C | 7.2 °C | 166 mm |
| September 2023 | 19.8 °C | 28.6 °C | 12.5 °C | 53 mm |
| September 2022 | 16.2 °C | 27.4 °C | 5.9 °C | 158 mm |
| September 2021 | 18.0 °C | 30.0 °C | 8.6 °C | 34 mm |
| September 2020 | 18.0 °C | 27.3 °C | 6.8 °C | 67 mm |
| September 2019 | 17.7 °C | 31.2 °C | 8.1 °C | 66 mm |
| September 2018 | 18.0 °C | 27.6 °C | 5.6 °C | 61 mm |
| September 2017 | 15.7 °C | 28.8 °C | 8.5 °C | 149 mm |
| September 2016 | 18.8 °C | 28.2 °C | 8.8 °C | 41 mm |
| September 2015 | 17.6 °C | 32.0 °C | 8.9 °C | 70 mm |
| September 2014 | 16.4 °C | 25.3 °C | 8.9 °C | 163 mm |
| September 2013 | 15.7 °C | 25.6 °C | 8.2 °C | 97 mm |
| September 2012 | 18.6 °C | 30.0 °C | 7.1 °C | 48 mm |
| September 2011 | 19.6 °C | 30.6 °C | 10.7 °C | 29 mm |
| September 2010 | 14.6 °C | 22.6 °C | 7.6 °C | 177 mm |
| September 2009 | 18.9 °C | 29.2 °C | 11.4 °C | 21 mm |
| September 2008 | 15.6 °C | 31.9 °C | 5.7 °C | 60 mm |
| September 2007 | 14.6 °C | 25.2 °C | 6.5 °C | 106 mm |
| September 2006 | 17.9 °C | 29.2 °C | 10.8 °C | 39 mm |
| September 2005 | 16.8 °C | 26.9 °C | 9.6 °C | 60 mm |
| September 2004 | 16.3 °C | 26.1 °C | 8.9 °C | 37 mm |
| September 2003 | 16.6 °C | 27.9 °C | 7.5 °C | 42 mm |
| September 2002 | 15.7 °C | 26.6 °C | 6.1 °C | 61 mm |
| September 2001 | 14.5 °C | 24.8 °C | 6.3 °C | 138 mm |
| September 2000 | 16.5 °C | 26.8 °C | 9.1 °C | 49 mm |
September in nearby towns
| Town | Avg high | Avg low | Precip. | Wet days |
|---|---|---|---|---|
| Keszthely | 21.2 °C | 13.1 °C | 79 mm | 10 |
| Hévíz | 21.2 °C | 13.1 °C | 79 mm | 10 |
| Lenti | 21.4 °C | 12.9 °C | 95 mm | 10 |
| Letenye | 21.6 °C | 12.8 °C | 95 mm | 10 |
| Nagykanizsa | 21.5 °C | 13.2 °C | 89 mm | 10 |
| Pacsa | 21.4 °C | 13.0 °C | 85 mm | 10 |
| Zalaegerszeg | 21.1 °C | 13.0 °C | 88 mm | 10 |
| Zalakaros | 21.7 °C | 13.4 °C | 85 mm | 10 |
| Zalalövő | 21.2 °C | 12.9 °C | 90 mm | 10 |
Other months in Keszthely
Frequently asked questions
What is the weather like in Keszthely in September?
Average highs of 21.2 °C and lows of 13.1 °C, with about 79 mm of precipitation on 10 wet days.
How hot does it get in Keszthely in September?
The September record is 32.9 °C (4 September 2024); there are 0.5 days of 30 °C or more in an average September.
How much does it rain in Keszthely in September?
79 mm on average; the wettest September (2010) brought 177 mm.
What was the warmest September in Keszthely?
2023, with a mean of 19.8 °C (data 2000–2025).
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.