Ahtari Weather in September
September in Ahtari brings moderate temperatures, with highs of 15°C (59°F) and nights dropping to 6°C (43°F). Rainfall is on the higher side this month, averaging around 65 mm (2.6 in), so keep a rain jacket handy.
Rainfall in Ahtari in September
Typically, you can expect about 18 days of rain this month, with 65 mm (2.6 in) on average. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Ahtari in September
In September, Ahtari sees moderate temperatures, with highs of 15°C (59°F). Nights drop to around 6°C (43°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Wind Speed in Ahtari in September
Average wind conditions reach 2 m/s (4 knots) in September. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Ahtari.
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 Ahtari's climate page.
Ahtari Temperature in September
Min Temperature
6°C (43°F)
Max Temperature
15°C (59°F)
Chance of Rain
58%
Precipitation
65 mm (2.6 in)
Rainy days
18 days
Humidity
83%
Windspeed
2 m/s (4 knots)
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ahtari typically drop from around 16°C (61°F) at the start of September to approximately 10°C (50°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 8°C (46°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 Ahtari in September
Browse day-by-day weather records for Ahtari spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ahtari historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Ahtari.
- On September 5, 2024, temperatures climbed to 26°C (79°F), marking the warmest September day on record.
- On September 27, 1986, Ahtari saw its coldest September day with temperatures maxing out at 2°C (36°F).
- The lowest overnight temperature recorded in September was -7°C (19°F) (September 30, 1978).
- The heaviest September precipitation occurred on September 28, 2006, when 31 mm (1.2 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 Ahtari in September
The weather can swing between comfortable and chilly in September, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Wet weather is likely, so pack waterproof gear for multiple rainy days.What To Do in Ahtari 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 Ahtari's climate page.
Temperature Rainfall Humidity Wind Speed
See the full Ahtari climate overview or explore weather in Finland.
