My flight HEL=>PRG was delayed. Scheduled aircraft was not able to leave AMS due to weather. Am I eligible for compensation?

I am a bit new to compensations, but after spending 9 hours between flights, and then 4 more hours due to delay, I am wondering about my situation. When aircraft finally arrived to HEL, airline told us that delay was caused by weather conditions in AMS, and scheduled aircraft was not able to leave airport. Thus, airline assembled another crew and aircraft, which arrived to take us to our destination. Taking into account that weather conditions is something that airline cannot control, I wonder it is important that it was weather in third airport, not in HEL or PRG.