Rainwater planning

Olsztyn rainfall profile for rainwater calculations

Monthly 1991–2020 precipitation normals for Olsztyn, annual total and an example yield from a 100 m² roof.

642.4 mmAnnual total
52.0 m³Example: 100 m² roof, 0.9 × 0.9
1991–2020IMGW normal period
JanFebMarAprMayJunJulAugSepOctNovDecYear
42.133.139.437.559.870.188.063.858.557.747.045.4642.4

Source: IMGW-PIB Climate Portal, 1991–2020 climate normals, OPAD_SUMA. Normals are long-term averages, not a forecast for a specific year.