Right after a week of drivin i still think my fans r cuttin in far 2 much n my temp gauge in the dash isnt exactly the best

so yesterday i fitted a revotec temp gauge, looks good and from what i can c works really well,

But from what i can c looks like my fans r cuttin in bout 85/90c n cuttin back out at 80, does this sound right?

The sender 4 the gauge is in the hose leadin from the block 2 the rad, i would have thought that they r cuttin in 2 soon,

" b fair at this time of year this aint no bad thin least it stops everthing over heatin but its a bit of a pain in the ass,

Can the Thermostat in the bottom of the rad go weak?