Poland
Warsaw in September: weather & travel advice
This month's data profile
Strong month under the current formula
Warsaw in September is climatically well suited to city breaks and active holidays and hiking. The average daily high is around 20 °C. With about 10 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
77/100 · #2
Warmth
#4
Dryness
#2
Sun
#6
Published best categories: Overall, City break, Active, Family
Warsaw · SeptemberPhoto: Scotch Mist · CC BY-SA 4.0Climate facts
- Average high
- 20 °C
- Average low
- 10 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 4 h/day
- Humidity
- 72 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 25 | 14 | 11 | 61 | 5.7 | 65 | 2.4 | 80 |
| September (selected) | 20 | 10 | 10 | 53 | 4.0 | 72 | 2.7 | 77 |
| October | 13 | 4 | 9 | 46 | 2.2 | 82 | 3.0 | 53 |
How do the previous and next months compare?
Baseline: September (77/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | +3 | +5.3 °C | +4.7 °C | +1.6 | +8.3 mm | +1.7 h | -6.3 % | -0.3 m/s |
| October | -24 | -6.8 °C | -5 °C | -0.4 | -6.7 mm | -1.8 h | +10 % | +0.3 m/s |
All twelve months in context
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Where to stay in Warsaw
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Useful next decisions
Frequently asked questions
How warm is Warsaw in September?
The average daily high is around 20 °C, with an average daily low of about 10 °C.
Does it rain a lot in Warsaw in September?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 53 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Warsaw?
By the climate score, June, July, August and September are the strongest months for Warsaw. September is one of them.