The best time to visit Warsaw is May, June and September, when average highs sit in the comfortable low-to-mid 20s and the sunshine is generous — June reaches 24.4 °C with 12.5 hours of sun a day, while September eases to 20.3 °C with just 10 rain days. July and August are peak season, hot enough but crowded with school-holiday visitors and busier around the Old Town. Winter is the quiet low season, cold and grey with highs near freezing and short, dim days.
Best months MayJuneSeptember
Warsaw month by month
Average highs and lows (°C), 2016–2025. Highlighted bars are the best months.
| Month | High | Low | Rain days | Sun / day |
|---|---|---|---|---|
| January | 2.1 °C | -2.6 °C | 13 | 2.9 h |
| February | 4.5 °C | -1.6 °C | 11 | 4.6 h |
| March | 8.9 °C | 0.4 °C | 10 | 7 h |
| April | 14.3 °C | 4.7 °C | 10 | 9.5 h |
| May | 19.2 °C | 9.1 °C | 12 | 11.4 h |
| June | 24.4 °C | 14.3 °C | 11 | 12.5 h |
| July | 24.8 °C | 15.6 °C | 14 | 11.6 h |
| August | 25 °C | 15.4 °C | 11 | 11 h |
| September | 20.3 °C | 11.5 °C | 10 | 8.8 h |
| October | 13.9 °C | 7 °C | 13 | 5.9 h |
| November | 7.1 °C | 2.4 °C | 10 | 3.4 h |
| December | 3.6 °C | -0.4 °C | 12 | 2.2 h |
How the months are picked.A month qualifies when its average high sits in the comfortable 20–28 °C band (scored down towards 9 °C and 37 °C), rain days are few and sunshine hours are high — at least 78 % of the city's best-scoring month. July and August are then set aside as peak season (school-holiday crowds and prices) whenever at least three other months qualify; where summer is the only comfortable window they stay. Figures are ten-year averages (2016-01-01 to 2025-12-31) from ERA5 reanalysis data via Open-Meteo (CC BY 4.0) for the city centre coordinates.
When to go, and what to expect
Spring (Mar–May)
May is a sweet spot — green, bright and comfortable for the Old Town.
Summer (Jun–Aug)
June is the pick; July–August are lively but hot and busy.
Autumn (Sep–Nov)
September is excellent value — mild days, lighter crowds.
Winter (Dec–Feb)
For festive markets and low-season calm, not for warmth or daylight.
Notable events
- December
- Warsaw Christmas Market in the Old Town
- Summer (Sunday afternoons, May–September)
- Chopin Concerts in Łazienki Park
- June
- Wianki Midsummer Festival on the Vistula
- September
- Warsaw Autumn International Festival of Contemporary Music
Frequently asked
Is Warsaw too hot in August?
No — August highs average 25 °C, warm but rarely oppressive. The bigger factor is crowds, as school holidays make it peak season around the Old Town.
What is the rainiest month in Warsaw?
July has the most rain days at 14, closely followed by January and October with 13. May and December each see 12, so spring and summer bring frequent but usually brief showers.
Is winter worth visiting Warsaw?
Only for the Christmas market and quiet streets. Highs hover near freezing — 2.1 °C in January — with just 2.2 hours of sun a day in December, so days are cold and short.
Know when to go? Now decide where to stay — our Warsaw area guide →
Areas of Warsaw
Best time to visit near here
Sources
- Open-Meteo historical weather API — monthly climate normals, 2016–2025 (CC BY 4.0)
- ERA5 reanalysis (ECMWF / Copernicus) — the underlying temperature, precipitation and sunshine data
- ReasonStay methodology — how the best months are computed and checked
An independent guide to Warsaw — honest, verified, no invented data. Climate figures: ERA5 via Open-Meteo, 2016–2025 averages; the best months are computed from them, not opinion.