Trieste Weather in September

September in Trieste typically sees daytime highs of 23°C (73°F) and nighttime lows of 15°C (59°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Trieste in September

Typically around 11 days of rainfall are expected, averaging 169 mm (6.7 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Trieste in September

September in Trieste brings high temperatures, with highs of 23°C (73°F) and nights around 15°C (59°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 15°C (59°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Trieste in September

Enjoy a sunny month with about 211 hours of sunshine, the clear skies make Trieste even more beautiful.

Average water temperature in September

At 22°C (72°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July typically offers the best weather for Trieste.