my trucks engine fan comes on quite a lot... is this normal? could something be wrong? but i really noticed it alot today just driving around the parking lot at work. comes on for maybe a minute at the most and then shuts off for a few more than comes back on....what's the deal here? never comes on while highway driving though........

 

Is it hot in Hawaii ??? Mine doesnt do that but it hasnt been above 65 yet here in Wyoming. It probably isnt getting enough air idleing around in the parking lot