How to Handle Shiitake Spawn Plugs During Hot Weather

I received my mushroom spores in the mail. I see the best climate is 75-85 degrees [Fahrenheit]. It will reach the 90s and above here very soon and I was concerned that this would bee too hot. If so, what is the best way to store these mushrooms until the fall?

The high temperatures are not a problem. The logs should be sprinkled with water for a couple of hours each week unless there has been a good rainfall. After wetting the logs and let the bark dry until the next wetting.