Winter is about to end.
This is a graph for German consumers, showing a typical household consumption of natural gas:


http://www.swm.de/dms/swm/bilder/pri...erlauf-gas.gif

I suppose the consumption in the Ukraine will fall sharply soon as well - and the winter was warm in Central Europe, so the underground storage sites are probably well-filled.

The industrial consumption of natural gas is more evenly distributed over the year, of course.