We report Filtered Rayleigh Scattering measurements of two dimensional temperature fields in weakly ionized. A measurement system that pairs the frequency tripled output (254nm) of a titanium sapphire laser with a narrow linewidth atomic mercury filter was used. Temperature measurements were performed in 50 torr glow discharges of argon, argon mixed with 1% nitrogen, and nitrogen. The 50 torr argon discharge was studied in a diffuse mode (20 mA) as well as in a contracted mode (70-130 mA). The data from the diffuse discharges is found to be consistent with prior measurements. Data from both the diffuse and contracted discharges is in agreement with calculation. The measurements have a spatial resolution of better than 1 mm, and uncertainties of approximately 5 percent.