I've seen this claim before, and traced it back to Sean Hannity. So, its just a mass media talking point.

Someone combed through studies on the subject from the 50s to 70s and while there was not the 97% consensus on global warming that there is today, there were something like 60% of studies predicting warming.

About 10% of studies predicted global cooling.

You've been misled by biased media outlets.