Kassari Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Kassari, Hiiumaa, Estonia. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's break down all the details for a clearer picture.
Generally, Kassari receives mid-range precipitation levels, with 649 mm (26 in) annually. The distribution varies significantly throughout the year, with a distinct dry season during certain months, as shown in our charts below.
Monthly Rainfall & Rainy Days
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Kassari experiences moderate seasonal variation in rainfall, with monthly averages ranging from 72 mm (2.8 in) in August, the wettest month, and 36 mm (1.4 in) in May, the driest month.
August, the wettest month, has a maximum daytime temperature of 22°C (72°F). The city receives 257 hours of sunshine in this period. During the driest month May you can expect a temperature of 15°C (59°F). For more detailed insights into the city's temperatures, visit our Kassari 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 September
Explore Kassari's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Kassari spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Estonia: City Comparison
The map below shows the annual precipitation across Estonia. You can also select the different months in case you are interested in a specific month.
Kassari vs World: Rainfall Compared
Kassari's average annual precipitation is 649 mm (26 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.
Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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.
The proximity of a location to a large body of water can significantly affect its rainfall patterns:
- Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
- Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA, over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Kassari's weather, including sunshine hours, humidity levels, and temperature data, visit our Kassari Climate page.
Kassari Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kassari - and find the best time to visit.
Kassari 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Kassari climate overview or explore weather in Estonia.
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Where to go in September - average daytime high across popular destinations.
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