The use of nanofluids in the Thermosciences has been of great interest since it enables a substantial improvement in the heat transfer capacity in thermal machines. This is possible due to the presence particles in suspension, with diameters less than 100 nm, dispersed in conventional fluids. Parameters such as viscosity and thermal conductivity are determining factors in the performance of these materials as thermal fluids in different applications. The objective of the present work was to determine the dynamic viscosity and the shear stress of three distinct nanofluids under controlled temperature conditions (range -10 Celsius degrees to 30 Celsius degrees) at laboratory. In addition, shear rate and rotation rate were also conditioning parameters. The experimental apparatus was assembled coupling a viscometer with a thermal bath. The obtained results showed an increase of the dynamic viscosity with temperature for all nanofluids with respect to their base fluids. An increase of the relative viscosity was also observed especially at higher temperatures. The three nanofluids have shown a non-newtonian behavior. With high shear rates, the measured viscosities tended towards constant values. Curve adjustments were performed between viscosity vs temperature and viscosity vs shear rate using exponential decay function and the Power Law, respectively. The achievements of this research added scientific understanding about the viscosity and rheological behavior of nanofluids at low temperatures.