Without giving us an error budget, e.g. max error at 25C, max error due to temperature, it's hard to say, but I'm assuming that max error due to temperature is more stringent than max error at 25C, because the latter can be calibrated out whereas the former cannot.
I would recommend just using a pair of 0.1% resistors if you can. Nowadays they're fairly inexpensive. Digikey sells 10K 0.1% 0603 resistors for 25c apiece that have 25ppm/C max tempco, with the price dropping to 10c apiece at high volumes. At that max tempco, even if one resistor has a +25ppm/C tempco and the other has -25ppm/C tempco, that will affect the output ratio of the divider by 0.0625% of fullscale -- at a 3V supply that's just under 2mV.
If you need tighter specs, get 10ppm/C resistors (more expensive: Mouser sells some from Xicon that are 75c apiece, dropping to about 20c apiece at very high volumes)
Or use an integrated matched pair of resistors meant for voltage dividers -- those are even more expensive, but you can get 5ppm/C tracking tempco from TT Electronics sold by Digikey at about $2.00 apiece dropping to 65c at very high volumes.
Or use a switched-capacitor voltage divider, and filter the heck out of it to get rid of switching noise.