Having the same issues here. Normal for this time of year is mid 40's, today will be 75. 90% of my trees already broke dormancy. Living room is full of trees right now and for the next 2 months unfortunately. :(.
Not sure of the exact cause but its related to the Suns magnetic fields which is affecting the earths magnetic fields. Also sunspot activity is way down which means cold is coming in the near future. From what I have read this is a repeating cycle every 200 years or so. Then there is also a 400 year cycle. These cycles lead the the earths cooling, mini ice ages and that sort of stuff.
My gut tells me thi is the calm before the storm. One last warm spell and then the cold will set in. Worldwide there has been crazy weather everywhere. Snowing in summer ect, very heavy rains, atmospheric rivers I think they are calling them. This is all caused by the sun and solar winds of which there has been a 30% decrease in over the last 10 years or so.. May not sound like much but it is huge..
The other planets in our solar system are also going through changes so the changes on our planet have nothing to do with man everything to do with the sun.
There's a channel on you tube. Adapt 2030 that discusses this stuff in pretty good detail. Lots of charts and graphs and historical records to back up this theory.