Temp raises when at a stop - 1995 Honda Civic

Could be the thermostat, Or The fan isn,t working,

It sounds like you may have a leak somewhere, possibly in your radiator. Been there, done that. I had to have the whole radiator replaced. You could pay to have it diagnosed from a trusted mechanic, or you would purchase some sealant, which can be added to the radiator fluid. Considering the age of your car, you may choose to take the more economical option first, but that is entirely up to you. If there is a whole or crack, it needs to be sealed. If, after you fill it, you notice that fluid is dripping, then you have a leak. If you choose to take it in for a check-up, make sure to get an estimate first. For older cars (which I have experience with), you don't want to invest more than what the car is worth. Good luck! JD