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The temperature is quite comfortable inside the building as it is well controlled. I would guess the temp is in the lower 70's upper 60's? This is not s definite number just guessing because those temps are good to me and I was comfortable. Factor in too, it depends on when you go and how many ppl are there. I went on a field trip with a school so the more bodies, the warmer.
Yes shorts would be great
I was there in July on very warm days & had on shorts & tank top & was fine.
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