Ten years of Berlin's own hourly weather, asked one question: at this hour, in this month, does opening the window pull water out of the room or push more in. Pick the room you are standing in, then tap any square.
A grid of twelve months by twenty four hours. Each square shows how many grams of water one cubic metre of Berlin outdoor air can take out of this room at that hour. Use the arrow keys to move, or tap a square.
The ring marks the hour you are reading this. Squares are ten year averages, so a wet week sits worse than its square and a dry one better.
Built from Deutscher Wetterdienst Climate Data Center hourly temperature and humidity for Berlin-Tempelhof, station 433, ten complete years from 2016 to 2025, 87,116 measured hours. Data licence GeoNutzV. Averages describe a normal Berlin year, not today's weather.