Perhaps, but not necessarily too hot since you’re measuring the surface temperature of the back side of the container. If that were the ambient temperature of a large part of your cage, I would say definitely too warm – and your snakes would be letting you know by staying away from it. Here’s where an infrared thermometer would come in handy. What’s the temperature a couple of inches away from that 94 degrees? What temperature is the snake choosing most often? Is that the maximum temp your setup will produce? Will it still produce that high a temp in the depths of winter, or will it drop considerably? I’d be a little more concerned about the 75 degree end being too cool and getting cooler as the cold weather begins.
I aim for a hot spot in the very low 90’s, with the coolest part of the cage not below 79. My blood pythons usually register a surface temperature of 83-84 degrees. Hope this information helps.
-Joan