Warsaw is warmest in August, averaging 26° by day and 14° at night. The wettest month is August with 90 mm, and the year brings about 674 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 2° | -6° | 56 mm | 8.0 h | Cool |
| February | 4° | -5° | 50 mm | 9.6 h | Cool |
| March | 9° | -2° | 28 mm | 11.5 h | Cool |
| April | 13° | 3° | 48 mm | 13.6 h | Mild |
| May | 19° | 9° | 59 mm | 15.5 h | Sightseeing |
| June | 24° | 13° | 75 mm | 16.5 h | Sightseeing |
| July | 26° | 15° | 81 mm | 16.1 h | Beach weather |
| August | 26° | 14° | 90 mm | 14.5 h | Beach weather |
| September | 22° | 10° | 48 mm | 12.4 h | Sightseeing |
| October | 15° | 5° | 53 mm | 10.3 h | Mild |
| November | 7° | 1° | 39 mm | 8.5 h | Cool |
| December | 1° | -2° | 47 mm | 7.5 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: July and August — highs around 26°, nights no colder than 14°, and at most 90 mm of rain in a month.
Walking the city: May, June and September — highs of 19–24° and no more than 75 mm of rain a month.