07 Honda civic

Hi just wondering if anyone else ever had the same issue.
My civic would start no problem but once it got kinda cold
out it struggle to start so I changed my battery had my
starter check three times passed all three times changed
starter relay still won’t start and checked my alternator by
running the car and removing the neg battery cable and
stood on but just won’t start anymore lights and
everything work alarm works just when I turn the key it
just clicks once and that’s all anyone have any idea what it
can be