Your assessment of April weather is correct. It was a colder-than-normal April – 5.8 degrees colder.

Here’s the April weather stats, according to Guy Verhoff, Pandora weather observer:
April 2018 average temperature: 43.9 degrees
April normal average temperature: 49.7 degrees
April 2018 precipitation: 2.34 inches; snowfall 2.3 inches
April normal average precipitation: 3.48 inches
April high temperature reading: 79 degrees on April 13th
April low temperature reading: 19 degrees on April 8

The attachment below shows April'a daily weather summary.