Rainwater planning

Katowice rainfall profile for rainwater calculations

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

723.2 mmAnnual total
58.6 m³Example: 100 m² roof, 0.9 × 0.9
1991–2020IMGW normal period
JanFebMarAprMayJunJulAugSepOctNovDecYear
43.839.447.744.975.778.7103.873.169.953.449.043.8723.2

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