Kassari Weather in September
In Kassari, September brings moderate daytime temperatures around 17°C (63°F), with nights cooling to 11°C (52°F). Expect quite a bit of rainfall this month.
Rainfall in Kassari in September
This month experiences about 16 days of rain according to historical data, averaging 61 mm (2.4 in). With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Kassari in September
In September, Kassari sees moderate temperatures, with highs of 17°C (63°F). Nights drop to around 11°C (52°F). The difference between afternoon and evening temperatures is usually noticeable. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Kassari in September
The area enjoys a moderate level of sunlight, with around 144 hours. It's a good balance between sunny and cloudy days.Should you favor a climate that's both dry and comfortably warm, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Estonia, check out our Kassari's climate page.
Kassari Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
17°C (63°F)
Chance of Rain
53%
Precipitation
61 mm (2.4 in)
Rainy days
16 days
Humidity
82% *
Sunshine
144 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kassari typically drop from around 17°C (63°F) at the start of September to approximately 13°C (55°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 13°C (55°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Kassari in September
Browse day-by-day weather records for Kassari spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kassari historical weather extremes in September
Based on weather observations in Kassari between 1976 and 2025, these are the recorded extremes during September.
- The hottest September day on record in Kassari reached 27°C (81°F) (September 4, 2024).
- The lowest daytime temperature in September was 6°C (43°F), recorded on September 16, 1993.
- The lowest overnight temperature recorded in September was -1°C (30°F) (September 30, 1993).
Best Places in Estonia in September
Find out more about the weather in Estonia and which places have the best travel conditions in this month. See all of Estonia in September →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Kassari in September
For Kassari in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Kassari in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Estonia, check out our Kassari's climate page.
Temperature Rainfall Sunshine Humidity
See the full Kassari climate overview or explore weather in Estonia.
