Scorpions will come out around sunset, with the best time to spot them being around 10 or 11.
Scorpions will usually start coming out about sunset. When the sun starts going out, and those insects start coming out at night, they're out hunting, usually you can find quite a few of them between the hours of about 10 and 11. Scorpions typically come out when the weather is roughly about 80 degrees throughout the evening. If you have a warm winter you are going to have scorpions worse throughout the summer.