Triest Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Triest, Friuli Venezia Giulia, Italy. This average is based on long-term data collected between 1990 and 2020. Now, let's explore all the details to give you a full picture.
Triest experiences significant rain/snowfall throughout the year, averaging 1484 mm (58 in) of precipitation annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Triest can be quite wet during November, receiving approximately 189 mm (7.4 in) of precipitation over 13 rainy days.
In contrast July, experiences much drier conditions, with 81 mm (3.2 in) of rainfall, spread across 12 rainy days.
November, the wettest month, has a maximum daytime temperature of 13°C (55°F). The city receives 98 hours of sunshine in this period. During the driest month July you can expect a temperature of 28°C (82°F). For more detailed insights into the city's temperatures, visit our Triest Temperature page.
Annual Rainfall in Italy: City Comparison
The map below shows the annual precipitation across Italy. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Triest vs World: Rainfall Compared
Triest's average annual precipitation is 1484 mm (58 in). Let's compare this to some popular worldwide tourist destinations:
In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.
Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Climate change is affecting precipitation patterns worldwide, including Triest:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
- Approximately 70% of lightning bolts strike land rather than oceans.
- A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.
For more detailed information about Triest's weather, including sunshine hours, humidity levels, and temperature data, visit our Triest Climate page.
