For misd-agin's benefit, here is the relevant page from Boeing, 2009. Of course they could be wrong.................
19
Factors Effecting Stopping Distance
• Speed
– Higher approach speed more distance
– Example 737-800 has increased flaps 30 and
40 approach speed for tail clearance.
• Wind - headwind good, tailwind bad
• Slope - uphill good, downhill bad
• Temperature, Altitude
• Inoperative equipment
I expect the 900 too.