Ostrołęka Weather in September

September in Ostrołęka brings pleasant temperatures around 19°C (66°F) during the day, dropping to 9°C (48°F) at night, with quite a bit of rainfall expected, averaging around 63 mm (2.5 in) for the month.

Rainfall in Ostrołęka in September

Rain is expected on roughly 13 days, totalling around 63 mm (2.5 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Ostrołęka in September

Daytime highs in Ostrołęka in September reach 19°C (66°F), with nights around 9°C (48°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 9°C (48°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.

If you prefer enjoying temperate temperatures and rain-free days, May, 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.

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For a detailed overview over the year and the best time to visit Poland, check out our Ostrołęka's climate page.

Ostrołęka Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 44%  

Precipitation 63 mm (2.5 in)  

Rainy days 13 days  

What to Wear in Ostrołęka in September

For Ostrołęka in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket.

What To Do in Ostrołęka in September

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

Cycling

10/10

Walking

10/10

Camping

4/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Poland, check out our Ostrołęka's climate page.

More climate data for Ostrołęka

Temperature Rainfall

See the full Ostrołęka climate overview or explore weather in Poland.