It no doubt will be better in May, and better still come June. But don't be overly surprised if the output isn't w-a-y ahead of now, solar modules are much more productive when cool. Due to the cooler modules and the bright cold air it isn't unusual to see solar performance in the crisp days of Spring and Fall rival the long days of summer.
Last Monday (3/6/17) I did a test of a bifacial (two sided) module on the ice of Sky Pond in New Hampton. Due to the reflectivity of ice and snow and the cool temps, it
far exceeded the rated output by the manufacturer
Here's a link to the video;
https://www.youtube.com/watch?v=GPoFQ5_HpzM&t=122s