Have to disagree with you on this one - we went for a walk on Monday at 6pm and it was sunny and 70 degrees. Went out yesterday at noon and it was sunny and nearly 60, which with a strong mid-April sun felt very warm. The next 2 days will feature more sun, and while a bit cooler than normal, it's going to feel just fine in the sun.
This might not be "ideal" spring weather for some, but I think calling this weather terrible is a little much.