  In the present letter we examine the possibility of constraining dyon black
holes based on the available observational data at the scale of the Solar
system. For this we consider the classical tests of general relativity, viz.,
the perihelion precession of the planet Mercury and the deflection of light by
the Sun. In connection to mathematical analysis we are considering static and
spherically symmetric dyon black hole which carries both the electric and
magnetic charge simultaneously, which are encoded it by the parameters
$\lambda_0$ and $\beta_0$. We constrain these two parameters using the Solar
system tests and obtain the permissible range from the observations.
