I'm seeing a lot of similarities for this summer in comparison to the Summer of '13. If you take a look at the pattern from Mar-May '13 which was a ridiculously chilly to cold Spring, and quite wet, this Spring is certainly showing signs of heading that way.
Knowing the LRC and given the pattern moving forward over the next 2-3 weeks and beyond, these maps above may certainly come close to matching up by the time we close out Spring. Just look at the warm/dry parts of the CONUS near Cali/SW and almost identical dryness in the KS/TX Panhandle region compared to the current pattern we are in. The bulls eye of AN precip centered over the MW and somewhat across the App's looks similar to this year thus far except the bulls eye this year is across the southern Plains in E OK/Texarkana up into the OV.
Now, look at where the CFSv2 is trending for the rest of Spring into June...dagger of coolness and wetness across the middle of the nation...watch out for the Canadian wild fires this year and some pretty sun sets from a NW Flow pattern that will probably funnel smoke into our skies.
These ideas fall in line with what I'm thinking at the moment with a biased warm to hot start to Summer down in the southern Plains up into the KS region. Things begin to switch around mid summer into late summer and we may very well see a cool to cold August across the MW corn belts. Low solar, pattern recognition, LRC, neutral ENSO and my intuition are saying that this should be an ideal summer if you don't like the heat/humidity, except down south and parts of the Plains. I'm sure there will be some days of heat but heat waves won't be common across the MW/GL's/OV.