Experimental results are discussed concerning temperature effects from $25^{circ}C$ to $100^{circ}C$ on amorphous silicon solar cells. N-I-P hydrogenated amorphous silicon solar cells are fabricated on stainless steel and indium tin oxide glass substrates. The open circuit voltage, short circuit current, fill factor and conversion efficiency have been measured under AM1 condition as a function of temperature. The open circuit voltage decreased by $2.6mV/^{circ}C$ while the short circuit current increases with increased temperature. The conversion efficiency is almost independent of temperature which is contrary to widely using single crystalline solar cells of which efficiencies decrease with increasing temperature.