Your September weather guide
WarmWeather in Budapest in September
September is a good time for Budapest if you want warm sightseeing weather rather than dependable heat. Average daytime highs are around 21°C, with nights falling to about 13°C, so light layers make more sense than a summer-only wardrobe. The catch is rain: around 8 days have measurable rainfall. For a UK traveller, it suits a city break with plenty of walking, provided you can adjust outdoor plans when the weather turns.
Long-term climate averages for Budapest, not a forecast · 1991-2020
Budapest, month by month
Your snapshot
At a glance
The useful details for Budapest.
- Average daytime high
- 21.4°C
- 9 in 10 days stay below 27°C
- Average night-time low
- 12.6°C
- coldest 10% of nights: 8°C or lower
- Compared with London
- +2.8°C
- London averages 18.6°C in September
- Sunshine per day (est.)
- 5.8h
- 47% of 12.3 h of daylight
- Rainy days (1 mm+)
- 8
- 58 mm over the month
- Humidity
- 70%
- Days over 25°C
- 21%
- 2% over 30°C
- Record high 1991-2020
- 33.3°C
- 2008-09-07
- Record low 1991-2020
- 3.6°C
- 2018-09-26
- Flight from London
- ≈ 2 h 36 min
- 1447 km, short-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How September compares
September is the 4th warmest month of the year in Budapest and ranks 127th of 134 destinations we compare for September - see where else is hot in September. Against London's average high of 18.6°C in September, Budapest is 2.8°C warmer by day and 1.4°C warmer at night.
Daytime and night-time in September
The typical September day in Budapest peaks at 21.4°C, but that is an average: the warmest 10% of days reach 26.8°C or more. Roughly 1 in 5 days top 25°C and 1 in 53 pass 30°C. Nights average 12.6°C; one night in ten drops to 8.4°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest September day here reached 33.3°C (2008-09-07) and the coldest night 3.6°C (2018-09-26).
Rain in September
Wet (more than 8 rainy days): about 8 days with 1 mm or more, 58 mm in total. Year to year it varies a lot - the wettest September was 2010 with 153 mm, the driest 1991 with 9 mm. Humidity averages 70%.
Sunshine and daylight
Around 5.8 hours of sunshine a day (estimated from cloud cover), 12.3 hours of daylight: the sun rises about 06:21 and sets about 18:57 local time in mid-September. Average cloud cover is 53%.
Is September a good time to visit Budapest?
September is not the strongest month here: warm days and frequent rain. The best months for Budapest on our scoring are August, July, June; months averaging 25°C or more: Jul, Aug.
Comfortable days, but pack for cooler evenings
The usual daytime warmth should make walking around comfortable without the persistent heat you might expect from a summer trip. A light top can work during warmer afternoons, but keep a jumper or jacket handy for shade and evenings. The warmest days reach around 27°C or more, so a September visit can still call for lighter clothing and a gentler pace at midday. At the other end, colder nights fall to around 8°C or below. If you like sitting outside after dark, bring a proper layer rather than relying on daytime warmth to last. September suits travellers who prefer mild conditions but can dress for variation.
Leave room to change plans when it rains
Rain is the main compromise, so avoid building the whole trip around being outdoors. Around 8 rainy days means a waterproof jacket and shoes that cope with wet pavements deserve space in your bag. That does not mean rain lasts all day, but a dry stay is not something to rely on. There is still useful light for exploring: September averages about 5.8 hours of sunshine within 12.3 hours of daylight. Keep outdoor plans flexible and use brighter spells when they arrive. If guaranteed sunshine matters more than comfortable walking temperatures, Budapest in September is not a particularly safe bet.
A little perspective
Budapest through the year
September is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|
| January | 3.1°C | -2.9°C | 2.7 | 36 | 8 | 0% |
| February | 5.5°C | -2.3°C | 3.5 | 36 | 8 | 0% |
| March | 10.6°C | 1.3°C | 4.7 | 41 | 8 | 0% |
| April | 16.6°C | 6.3°C | 6.1 | 46 | 9 | 2% |
| May | 21.2°C | 11.3°C | 6.6 | 67 | 12 | 20% |
| Junebest | 24.8°C | 15.3°C | 7.4 | 71 | 11 | 48% |
| Julybest | 26.9°C | 17.2°C | 8.1 | 72 | 10 | 68% |
| Augustbest | 26.9°C | 17.0°C | 8.1 | 58 | 9 | 69% |
| SeptemberSelected | 21.4°C | 12.6°C | 5.8 | 58 | 8 | 21% |
| October | 15.7°C | 7.7°C | 4.4 | 52 | 8 | 1% |
| November | 9.2°C | 3.0°C | 2.8 | 52 | 9 | 0% |
| December | 3.6°C | -1.8°C | 2.4 | 44 | 8 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in September
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
France · 21°C by day
Paris
Italy · 23°C by day
Lake Garda
Italy · 23°C by day · sea 23°C
Venice
Italy · 23°C by day · sea 23°C
Lido di Jesolo
Italy · 23°C by day
Milan
A little more detail
Budapest in September FAQs
Plain answers, grounded in the averages.
Is Budapest hot in September?
Budapest is warm in September: the average daytime high is 21.4°C and nights average 12.6°C. Roughly 1 in 5 September days reach 25°C.
How much does it rain in Budapest in September?
Budapest sees about 8 rainy days (1 mm or more) and 58 mm of rain in a typical September. The wettest September between 1991 and 2020 was 2010 (153 mm) and the driest was 1991 (9 mm).
How sunny is Budapest in September?
Budapest gets around 5.8 hours of sunshine a day in September out of 12.3 hours of daylight (estimated from average cloud cover).
How does Budapest compare with the UK in September?
Budapest is on average 2.8°C warmer than London by day in September (21.4°C against 18.6°C).
What is the hottest September on record in Budapest?
Between 1991 and 2020 the hottest September day in Budapest reached 33.3°C on 2008-09-07, and the coldest night dropped to 3.6°C on 2018-09-26.
Is Budapest warmer than London in September?
Yes. Budapest's average daytime high is 21.4°C, compared with London's 18.6°C, a difference of 2.8°C. That gives you a warmer daytime average, but not consistently hot weather. You should still pack layers for evenings and cooler spells.
How likely is hot weather in September?
Warm afternoons are quite possible, but strong heat is uncommon. Around 21% of days reach 25°C, while only 2% reach 30°C. Pack something light for warmer spells, but do not choose September expecting every day to feel like high summer.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid), 1991-2020
Averages computed from daily values at Budapest. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C