Climate charts
PiranSlovenia

Piran Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Piran, Slovenian Littoral (Primorska), Slovenia. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.

Piran has a notably wet climate with abundant precipitation, recording 1280 mm (50 in) of rainfall per year.

Monthly Rainfall & Rainy Days

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

The seasons in Piran, bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 179 mm (7 in) of precipitation. This rainfall is distributed across 13 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 55 mm (2.2 in) over 11 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

November, the wettest month, has a maximum daytime temperature of 15°C (59°F). The city receives 110 hours of sunshine in this period. During the driest month July you can expect a temperature of 27°C (81°F). For more detailed insights into the city's temperatures, visit our Piran Temperature page.

Daily Historical Precipitation

Average daily rainfall for each day of the month based on long-term records. 50-year average (1976-2025)

Average precipitation in August

Explore Piran's Historical Precipitation: 1976-2026

Browse day-by-day precipitation records for Piran spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.

Annual Rainfall in Slovenia: City Comparison

The map below shows the annual precipitation across Slovenia. You can also select the different months in case you are interested in a specific month.

Avg day temp (°C)
32°

Piran vs World: Rainfall Compared

Piran's average annual precipitation is 1280 mm (50 in). Let's compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm (21 in) of rainfall annually, with wet winters and dry summers typical of southern Spain.

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.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.

How is Precipitation Measured?

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.

  • Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
  • Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.
  • Interesting weather facts

    • Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
    • In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
    • Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

    For more detailed information about Piran's weather, including sunshine hours, humidity levels, and temperature data, visit our Piran Climate page.

    Piran Weather by Month

    Pick a month to see the average temperature, rainfall and sunshine in Piran - and find the best time to visit.

    Piran 3-Day Forecast

    More climate data for Piran

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