Depends on the temperature, ULSD/LSD, batch quality, additives, and refinery that made it.

What are you specifically looking for?

2.2 to 5.3 cSt at 40*C is whats normal. At 210*F, the viscosity of diesel is about 1.3 cSt. At 0*F, it's about 28 cSt. (centistoke *cSt*- A unit of measure representing 1/100th of a stoke (S), which is the fundamental unit of kinematic viscosity.)