The environmental conditions produce variations of the fresh properties of conventional as well as self-compacting concrete (SCC) and, consequently, affect the material quality during production. Though the characteristics of SCC in the fresh state are generally evaluated through engineering-type tests, rheological studies with viscometers permit a deeper comprehension of its behavior, in this manner contributing to a more rational mix design. This work is an up-scaling to the concrete level of the mortar study presented in CPI 4/09. It resumes an exhaustive experimental program aiming to evaluate the influence of temperature (from 10 to 40ºC), time (up to more than 1 hour after fabrication) and waiting conditions (stationary or periodically remixed) on the properties of SCC. Rheological measurements through a BML viscometer, and slump-flow and V-funnel tests were performed. The results allow concluding that the attention to such conditions cannot be minimized.