Weather in Warsaw in September
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn September, Warsaw sees average highs of 20.0°C (68.0°F) and lows of 10.7°C. Conditions are pleasantly mild and moderately rainy (8 rainy days), with roughly 8.9 hours of sunshine a day. This is peak season for good reason — conditions are close to ideal. For the complete picture, see the best time to visit Warsaw — every month compared. Once you know when to go, find your Warsaw packing list at 247PackingList.
Get ready for Warsaw in September
Search flights to Warsaw
Compare 100+ airlines for September — one search, best price.
Search Flights →Thermal travel layers
Pack proper layers — winters are genuinely cold and evenings drop fast year-round.
Check Price →What to pack for Warsaw in September
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
- Light waterproof layer
Compare all months in Warsaw
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 3.3°C | 54.4mm | 8/10 |
| February | 4.7°C | 53.8mm | 8/10 |
| March | 8.4°C | 28.8mm | 10/10 |
| April | 12.5°C | 56.1mm | 10/10 |
| May | 17.8°C | 78.9mm | 10/10 |
| June | 24.2°C | 82.0mm | 10/10 |
| July | 25.3°C | 75.8mm | 10/10 |
| August | 24.8°C | 103.6mm | 9/10 |
| September | 20.0°C | 53.1mm | 10/10 |
| October | 14.6°C | 59.0mm | 10/10 |
| November | 7.2°C | 40.9mm | 10/10 |
| December | 2.7°C | 53.1mm | 8/10 |
Full month-by-month guide: best time to visit Warsaw →
For facts about Poland — currency, language and dialling code — see our Poland country guide at 247CountryInfo. Travellers also find it useful to keep a Warsaw travel guide to hand. Check clothing sizes in Poland before you shop.
Frequently Asked Questions
Is September a good time to visit Warsaw?
September rates 10/10 for visiting Warsaw — excellent time to visit. Expect average highs of 20.0°C, 53.1mm of rain across the month and about 8.9 hours of daily sunshine.
What is the temperature in Warsaw in September?
In September, Warsaw has average highs of 20.0°C (68.0°F) and average lows of 10.7°C (51.3°F).
Does it rain in Warsaw in September?
Not much. September averages just 53.1mm of rain in Warsaw — the odd shower is possible but most days stay dry.
What should I wear in Warsaw in September?
For Warsaw in September (20.0°C highs / 10.7°C lows), pack warm layers plus light jacket or fleece, comfortable walking shoes, light waterproof layer.
More essentials for Warsaw in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.