Weather in Trieste in September 2024
Average weather
Average temperature in Trieste in September
Going from a maximum of +28°C during the day to a minimum of +8°C during the night, the temperature in September averages around +24°C.
The average maximum temperature goes down 20% by the end of the month, compared with the beginning of the month, from +25°C to +21°C.
Is Trieste warm or cold in September?
Trieste is typically warm in September.
Maximum temperatures go down compared to the previous month from +29°C to +24°C. The minimum temperature also goes down from +20°C to +16°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Trieste:
Climate in Trieste in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +24°C | +19°C | ||||
| Min. temperature | ||||||
| +8°C | +6°C | -1°C | ||||
| Max. temperature | ||||||
| +37°C | +32°C | +30°C | ||||
| Rainfall | ||||||
| 97 mm | 153 mm | 153 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 63% | 66% | 70% | ||||
| Air pressure | ||||||
| 1013 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 17 | 13 | 11 | ||||
| Cloudy days | ||||||
| 8 | 9 | 11 | ||||
| Rainy days | ||||||
| 6 | 8 | 9 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +29°C in the day, the average maximum temperature lowers to +24°C. Prepare for more rain. Average rainfall goes from 97 mm to 153 mm. Humidity rises from 63% to 66%. The average wind speed doesn’t change much during September, staying around 1 m/s. The days becoming less sunny, going from 17 sunny days in August to 13 in September.
October brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Trieste is gradually decreasing during September, going from 4 m/s to 1 m/s over the course of the month.
Rain
How was the weather last September in Trieste?
Climate Change over Years
The climate in Trieste in September has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+22°C) and the highest in 2016 (+30°C). The driest year was 1985 with only 12 mm of rainfall, and the wettest year was 2013 with 478 mm.
FAQ
Is September a good time to visit Trieste?
Can you sunbathe in Trieste in September?
Is Trieste rainy in September?
Is it sunny in Trieste in September?
Other cities in Italy
Monthly weather in Trieste
Source of the data
For this page, we’ve looked at the typical weather in Trieste, based on historical hourly weather data from January 1, 1979, to December 31, 2022.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.