Grottaferrata Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Grottaferrata, Lazio, Italy. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let's break down all the details for a clearer picture.

Grottaferrata is known for its substantial rainfall, with annual precipitation reaching 1014 mm (40 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.

Monthly Precipitation Levels

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

Grottaferrata can be quite wet during November, receiving approximately 149 mm (5.9 in) of precipitation over 15 rainy days.

In contrast July, experiences much drier conditions, with 28 mm (1.1 in) of rainfall, spread across 5 rainy days.

November, the wettest month, has a maximum daytime temperature of 17°C (63°F). The city receives 129 hours of sunshine in this period. During the driest month July you can expect a temperature of 31°C (88°F). For more detailed insights into the city's temperatures, visit our Grottaferrata Temperature page.

Grottaferrata's average annual precipitation is 1014 mm (40 in). Let's compare this to some popular worldwide tourist destinations:

Boston, USA, experiences 1238 mm (49 in) of annual precipitation, including significant snowfall during the winter.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

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.

• 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 Grottaferrata's weather, including sunshine hours, humidity levels, and temperature data, visit our Grottaferrata Climate page.