It's frustrating. I think we all accept and understand late season cold happens there's no surprise there but the damage to ag is certainly enhanced when you have a March that's +5 vs one that was -5 given the ability of a colder March to hold back explosive greenups. We have certainly entered a hemispheric cycle of warm late winter early spring then a cold mid to late spring over the last half decade. I'm not sure the exact cause my guess is stronger pvs and more polar cold being released during the seasonal pv breakdown but it's just a hunch.
Regardless there are cumulative effects of doing this year over year and within the year as well. It'll be interesting to see if we see parts of the region affected by late spring cold start heading into drought territory in June/ July if you remember last year we were headed toward dry but elsa came along and held off dryness for a while.
When it comes to holding back heat and humidity maybe that's relevant for the deep south and some coastal areas but heat and humidity in April and even early may around here is about as rare as late season cold. Sure we might pop and random 90 in April/ early may but it's not commonplace. If people want to hold off true heat and humidity hope for a late may or early June wedge or cutoff when dews 65-70 and highs near 90 are more likely, or a July cold front, or early fall fronts in mid August to early September not -15-20 days in April when our averages are struggling into the low 70s with lows still in the mid 40s