The temperature in the morning can be cold to chilly. Some mornings I wear a fleece under my light windbreaker coat, sometimes I do not. So guess about 50 degrees but it is cold in a moving vehicle. Then it warms up to mid 70 in the afternoon and then cools down again at night. These rangers are tough guys, the upper body gets the brunt of the wind and his legs are not as exposed so maybe he is fine with his coat and shorts. None of the guests wear shorts on game drives but we might around the camp at lunch time.