Hi ANthony,
Wow, you are getting so close. Pretty soon it will be time for the single digit dance-love that!
Typically the crowds in June are heavy but not quite to the point of the July and August masses. I like to use
www.touringplans.com to help figure out expected crowd levels. The site utilizes a number of factors like special events, holidays and past attendance to show an expected crowd level on a scale of one to ten. One is the lowest crowds and shortest expected rate times and ten is the highest crowds and longest expected wait times. For the week of June 7-13, the site is predicting levels at seven and eight. You will be on property during the last Star Wars weekend at Hollywood Studios, June 12-14. If you are a Star Wars fan, be sure to checkout the special events-if you are not a Star Wars fan, be sure to visit Hollywood Studios on a different day as this event often increases the crowds at that park.
As for weather, it will most likely be hot. The average highs are in the low nineties and the lows are around seventy. You can expect to encounter a number of rain showers as June is often the highest amount of yearly rainfall, with approximately 7.3 inches. Typically the rain comes in a quick but heavy daily shower and then clears away, however Disney World was stuck in the middle of an odd tropical depression pattern recently that produced a good deal of long rain periods. Hopefully that has moved on and will not be seen again for some time.
Be sure to stay cool, take breaks out of the sun and drink plenty of water. It is easy to become over-heated when you are not use to the heat. Don't forget your sunscreen and most importantly.... enjoy!