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Pietarsaari Weather in September

September in Pietarsaari typically sees daytime highs of 15°C (59°F) and nighttime lows of 8°C (46°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Pietarsaari in September

Typically around 16 days of rainfall are expected, averaging 65 mm (2.6 in) for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Pietarsaari in September

If you're visiting Pietarsaari in September, expect highs of 15°C (59°F) and overnight lows 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.

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.

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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 Pietarsaari's climate page.

Pietarsaari Temperature in September

Min TemperatureMin Temperature 8°C (46°F)  
Max TemperatureMax Temperature 15°C (59°F)  
Chance of RainChance of Rain 54%  
PrecipitationPrecipitation 65 mm (2.6 in)  
Rainy daysRainy days 16 days  

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 →

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Legend 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 Pietarsaari 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 Pietarsaari in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling
6/10
Walking
6/10
Barbeque
5/10
Camping
4/10
Outdoor sports
10/10

Select a Month

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 Pietarsaari's climate page.

More climate data for Pietarsaari