Air Guitar World Championship Finland
This is something you might want to add to your bucket list. August is also the perfect time to visit Finland. The days are long and the temperature is amazing.
Posio Weather in September
In Posio, September brings low daytime temperatures around 12°C (54°F), with nights cooling to 5°C (41°F). Expect quite a bit of rainfall this month.
Rainfall in Posio in September
You can expect rain on around 18 days based on historical patterns, with 70 mm (2.8 in) average for the month. With rain spread across many days but low totals, showers are typically short and light rather than heavy.
Temperature in Posio in September
Temperatures in Posio in September top out at 12°C (54°F) and drop to 5°C (41°F) overnight. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.For Posio itself, July generally stands out with 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.
Posio Temperature in September
Min Temperature
5°C (41°F)
Max Temperature
12°C (54°F)
Chance of Rain
59%
Precipitation
70 mm (2.8 in)
Rainy days
18 days
Humidity
85% *
* Data from: Kuusamo, Finland (48 KM, 30 Miles).
Posio Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Posio - and find the best time to visit.
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
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Posio in September
The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Rain is likely on several days, so bring a good rain jacket.
What To Do in Posio in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling6/10 -
Walking6/10 -
Barbeque3/10 -
Camping4/10 -
Outdoor sports6/10
Posio 3-Day Forecast
More climate data for Posio
See the full Posio climate overview or explore weather in Finland.
Popular in September
Where to go in September - average daytime high across popular destinations.
Helsinki
16°C (61°F) Turku17°C (63°F) Tampere
15°C (59°F) Vuokatti
13°C (55°F) Rovaniemi13°C (55°F) Äkäslompolo12°C (54°F) Ruka12°C (54°F) Levi12°C (54°F) Bucket list
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Air Guitar World Championship Finland
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