Hämeenlinna Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Hämeenlinna, Southern Finland, Finland. 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.

Generally, Hämeenlinna receives mid-range precipitation levels, with 699 mm (28 in) annually.

Monthly Precipitation Levels

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

The climate in Hämeenlinna shows significant variation throughout the year. Expect 87 mm (3.4 in) of precipitation during the wettest month July, distributed over 15 rainy days.

In contrast, March offers drier and sunnier days, with around 38 mm (1.5 in) of snow/rainfall over 15 snowy/rainy days.

July, the wettest month, has a maximum daytime temperature of 23°C (73°F). The city receives 247 hours of sunshine in this period. During the driest month March you can expect a temperature of 3°C (37°F). For more detailed insights into the city's temperatures, visit our Hämeenlinna Temperature page.

Hämeenlinna's average annual precipitation is 699 mm (28 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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 Hämeenlinna:

• 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.

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