Boll weevils (Anthonomus grandis grandis Bohman) from near Portageville, MO; Starkville, MS; and Corpus Christi, TX were exposed to temperatures of approximately -4, -7, -9, -12, and -15°C for 6 hours to determine if there were differences in the cold tolerance of these populations. No statistically significant differences were observed between these populations; survival at -3.9°C averaged 82.7 percent; at -6.7°C, 72.2 percent; and at -9.4°C, 61.5 percent. Survival at -12 and -15°C was negligible across populations. While boll weevils have been quite facile in adapting to varying winter climates by acquiring diapause, these data suggest that little adaptation to cold temperature has occurred at the northern limits of the boll weevil's range.