Mid-June vs. July

[disneybliss2]

We typically go mid-June (around the 14th) and stay for 10 days. We may need to change our trip to July (week after the 4th--the 7th which worries me that it would still be too close to the 4th and be crowded; stay same amount of time, 10 days). What weather and crowd differences would we notice? Hotter, more rain, more crowded in July, no difference, or better? Would we be better off keeping the trip in June, see no difference in switching, or better in July? Easywdw actually has crowd level for July at an 8 for the dates we would go and 9s for the dates in June, which surprises me & may change to a higher crowd level in July as the date gets closer.

Thanks for the help!