Your September weather guide
WarmWeather in Venice in September
September is a good time for Venice if you want warm sightseeing weather rather than strong heat, but you need to be comfortable with rain. Average daytime highs are around 23°C, falling to 16°C at night, with about 10 rainy days during the month. That makes light clothing and an evening layer a sensible combination. Choose it for comfortable daytime exploring and a sea that is still warm enough for swimming, not guaranteed dry skies.
Long-term climate averages for Venice, not a forecast · 1991-2020
Venice, month by month
Your snapshot
At a glance
The useful details for Venice.
- Average daytime high
- 22.7°C
- 9 in 10 days stay below 26°C
- Average night-time low
- 16.1°C
- coldest 10% of nights: 13°C or lower
- Compared with London
- +4.1°C
- London averages 18.6°C in September
- Sea temperature
- 22.6°C
- year to year: 22°C to 24°C
- Sunshine per day (est.)
- 6.5h
- 53% of 12.3 h of daylight
- Rainy days (1 mm+)
- 10
- 120 mm over the month
- Humidity
- 74%
- Days over 25°C
- 22%
- 0% over 30°C
- Record high 1991-2020
- 30.6°C
- 2019-09-01
- Record low 1991-2020
- 9.0°C
- 2002-09-30
- Flight from London
- ≈ 2 h 12 min
- 1121 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 Venice and ranks 124th of 134 destinations we compare for September - see where else is hot in September. Within Italy it is 14th of 16 (Italy in September). Against London's average high of 18.6°C in September, Venice is 4.1°C warmer by day and 4.9°C warmer at night.
Daytime and night-time in September
The typical September day in Venice peaks at 22.7°C, but that is an average: the warmest 10% of days reach 26.2°C or more. Roughly 1 in 5 days top 25°C and 1 in 500 pass 30°C. Nights average 16.1°C; one night in ten drops to 12.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 30.6°C (2019-09-01) and the coldest night 9.0°C (2002-09-30).
Rain in September
Wet (more than 8 rainy days): about 10 days with 1 mm or more, 120 mm in total. Year to year it varies a lot - the wettest September was 2017 with 235 mm, the driest 1997 with 28 mm. Humidity averages 74%.
Sea temperature in September
The sea averages 22.6°C - warm enough to swim (22°c+). Depending on the year it ranges from 21.6°C to 23.7°C. For the warmest sea here, come in August (25.9°C).
Sunshine and daylight
Around 6.5 hours of sunshine a day (estimated from cloud cover), 12.3 hours of daylight: the sun rises about 06:49 and sets about 19:23 local time in mid-September. Average cloud cover is 47%.
Is September a good time to visit Venice?
It is a reasonable choice: warm days but expect showers. The best months for Venice on our scoring are July, August, June; months averaging 25°C or more: Jul, Aug.
Warm days, with a cooler edge after dark
The warmth should suit travellers who find hotter city breaks tiring. Days reach 25°C on 22% of occasions, so there is still scope for warmer afternoons, but sustained heat is not the main reason to come. Humidity averages 74%, which can make a warm spell feel a little sticky; breathable clothes are more useful than heavy layers while you are out walking. After sunset, keep a jumper or light jacket handy. The coldest nights can fall to around 13°C or lower, so packing only summer clothes would be a mistake. Plan more energetic walking for the cooler parts of warmer days.
Keep your plans flexible around rain
Rain is the main catch in September. With about 10 rainy days, it makes sense to leave room to swap outdoor plans around rather than expect a completely dry break. Carry a compact umbrella or lightweight waterproof and choose shoes you can comfortably wear in wet weather. There is still about 6.5 hours of sunshine a day within 12.3 hours of daylight, so the wet outlook does not mean constant gloom. You have daylight for unhurried exploring, but sunshine will not necessarily last throughout it. September works best if you are happy to adjust your pace when the weather changes.
A little perspective
Venice through the year
September is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 7.1°C | 1.5°C | 9.4°C | 3.5 | 60 | 8 | 0% |
| February | 8.7°C | 2.0°C | 8.3°C | 4.4 | 62 | 7 | 0% |
| March | 12.3°C | 5.1°C | 9.8°C | 5.4 | 69 | 8 | 0% |
| April | 16.3°C | 8.9°C | 13.5°C | 6.0 | 82 | 10 | 0% |
| May | 20.8°C | 13.5°C | 18.4°C | 6.8 | 93 | 10 | 7% |
| Junebest | 24.8°C | 17.6°C | 22.9°C | 8.2 | 77 | 9 | 47% |
| Julybest | 27.2°C | 19.9°C | 25.5°C | 9.1 | 60 | 8 | 82% |
| Augustbest | 27.4°C | 20.2°C | 25.9°C | 8.3 | 82 | 8 | 80% |
| SeptemberSelected | 22.7°C | 16.1°C | 22.6°C | 6.5 | 120 | 10 | 22% |
| October | 17.8°C | 12.0°C | 18.8°C | 4.6 | 118 | 11 | 0% |
| November | 12.5°C | 7.2°C | 15.1°C | 3.3 | 125 | 11 | 0% |
| December | 8.0°C | 2.6°C | 11.8°C | 3.5 | 79 | 9 | 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
- Sea
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.
Croatia · 23°C by day · sea 23°C
Pula
Bulgaria · 23°C by day · sea 23°C
Sunny Beach
France · 24°C by day · sea 23°C
Nice
United States · 24°C by day · sea 21°C
New York
Spain · 24°C by day · sea 24°C
Barcelona
A little more detail
Venice in September FAQs
Plain answers, grounded in the averages.
Is Venice hot in September?
Venice is warm in September: the average daytime high is 22.7°C and nights average 16.1°C. Roughly 1 in 5 September days reach 25°C.
Can you swim in the sea in Venice in September?
The sea around Venice averages 22.6°C in September, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 22°C to 24°C depending on the year.
How much does it rain in Venice in September?
Venice sees about 10 rainy days (1 mm or more) and 120 mm of rain in a typical September. The wettest September between 1991 and 2020 was 2017 (235 mm) and the driest was 1997 (28 mm).
How sunny is Venice in September?
Venice gets around 6.5 hours of sunshine a day in September out of 12.3 hours of daylight (estimated from average cloud cover).
How does Venice compare with the UK in September?
Venice is on average 4.1°C warmer than London by day in September (22.7°C against 18.6°C).
What is the hottest September on record in Venice?
Between 1991 and 2020 the hottest September day in Venice reached 30.6°C on 2019-09-01, and the coldest night dropped to 9.0°C on 2002-09-30.
Is the sea warm enough for swimming in September?
Yes. The sea averages 22.6°C, with a year-to-year range of 22°C to 24°C, putting it in the swimming range. It is a reasonable month to pack swimwear, though a wet or cooler day may make getting out feel less comfortable.
How much warmer is Venice than London in September?
Venice has an average daytime high of 22.7°C, compared with London's 18.6°C - a difference of 4.1°C. Expect noticeably warmer afternoons rather than intense heat, while still bringing an evening layer and protection from rain.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Venice. Sea temperature from the nearest 5 km sea cell, 1.5 km from that point. 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