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Olsztyn Weather in September
Olsztyn in September averages 19°C (66°F) during the day and 9°C (48°F) at night. Keep in mind that quite a bit of rainfall is expected this month.
Rainfall in Olsztyn in September
Typically, about 15 days will experience rainfall, with an average of 66 mm (2.6 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Olsztyn in September
September in Olsztyn brings pleasant temperatures, with highs of 19°C (66°F) and nights around 9°C (48°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.If your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Olsztyn.
Olsztyn Temperature in September
Min Temperature
9°C (48°F)
Max Temperature
19°C (66°F)
Chance of Rain
49%
Precipitation
66 mm (2.6 in)
Rainy days
15 days
Olsztyn Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Olsztyn - and find the best time to visit.
Best Places in Poland in September
Find out more about the weather in Poland and which places have the best travel conditions in this month. See all of Poland 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 Olsztyn in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in Olsztyn in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Camping4/10 -
Outdoor sports10/10
Olsztyn 3-Day Forecast
More climate data for Olsztyn
See the full Olsztyn climate overview or explore weather in Poland.
Popular in September
Where to go in September - average daytime high across popular destinations.
Poznań
20°C (68°F) Kraków
20°C (68°F) Warsaw20°C (68°F) Gdańsk19°C (66°F) Gdynia
18°C (64°F) Sopot19°C (66°F) Kołobrzeg19°C (66°F) Zakopane17°C (63°F) Bucket list
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