Do not judge your workout's effectiveness by the degree of sweating. Sweating is just a a body's thermoregulatory mechanism to cool you down.

Often people believe that sweating is related to hard work, but in reality, it doesn't necessarily indicate the sign of exertion. One may sweat profusely at certain intensity of exercise in summers and may not even sweat with the same intensity in winters! Also, there are individual variations and certain other determinants of the degree of sweating.