Kouvola Weather in September
Kouvola in September sees moderate temperatures, with highs around 16°C (61°F) and overnight lows of 8°C (46°F). Rainfall is fairly high at around 60 mm (2.4 in) on average, so pack waterproofs just in case.
Rainfall in Kouvola in September
Typically, you can expect about 17 days of rain this month, with 60 mm (2.4 in) on average. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Kouvola in September
September in Kouvola brings moderate temperatures, with highs of 16°C (61°F) and nights around 8°C (46°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.If you prefer dry days with pleasant temperatures, June, July and August typically offer the best 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 Finland, check out our Kouvola's climate page.
Kouvola Temperature in September
Min Temperature
8°C (46°F)
Max Temperature
16°C (61°F)
Chance of Rain
55%
Precipitation
60 mm (2.4 in)
Rainy days
17 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kouvola typically drop from around 17°C (63°F) at the start of September to approximately 11°C (52°F) by the end. Nights are cold, with lows typically ranging from 5°C (41°F) to 10°C (50°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 Kouvola in September
Browse day-by-day weather records for Kouvola spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kouvola historical weather extremes in September
According to our 49 years of weather records for Kouvola, the following extremes were recorded between 1976 and 2025.
- On September 4, 2024, temperatures climbed to 27°C (81°F), marking the warmest September day on record.
- Kouvola experienced its chilliest September day on September 23, 2014, reaching only 3°C (37°F).
- The coldest night in September in Kouvola was on September 30, 1993, with a minimum of -4°C (25°F).
- The heaviest September precipitation occurred on September 28, 2012, when 28 mm (1.1 in) of precipitation fell.
Best Places in Finland in September
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in September →
perfect weather
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tolerable
unpleasant
poor
What to Wear in Kouvola in September
Pack for changing conditions in Kouvola in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Rain gear is recommended, you can expect wet weather on multiple days.What To Do in Kouvola 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 Finland, check out our Kouvola's climate page.
See the full Kouvola climate overview or explore weather in Finland.
