Sejny Weather in September

With daytime temperatures of 19°C (66°F) and nighttime lows of 9°C (48°F), September in Sejny brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 62 mm (2.4 in) falls on average.

Rainfall in Sejny in September

Past climate data indicates that roughly 14 days will see rain, totalling around 62 mm (2.4 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Sejny in September

Temperatures in Sejny in September top out at 19°C (66°F) and drop to 9°C (48°F) overnight. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. 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 your ideal day consists of dry skies and pleasant temperatures, June, July and August typically offer the best circumstances for Sejny.

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

Sejny Temperature in September

Min Temperature 9°C (48°F)  

Max Temperature 19°C (66°F)  

Chance of Rain 47%  

Precipitation 62 mm (2.4 in)  

Rainy days 14 days  

What to Wear in Sejny 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 Sejny 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 Sejny's climate page.

More climate data for Sejny

Temperature Rainfall

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