We analyze ground-based Fabry-Perot interferometer observations of upper thermospheric (~250 km) horizontal neutral winds derived from Doppler shifts in the 630.0 nm (red line) nightglow. The winds were measured over the following locations: South Pole (90¿S), Halley (76¿S, 27¿W), Arequipa (17¿S, 72¿W), Arecibo (18¿N, 67¿W), Millstone Hill (43¿N, 72¿W), S¿ndre Str¿mfjord (67¿N, 51¿W), and Thule (77¿N, 68¿W). We derive climatological quiet time (Kp 150). The seasonal dependence of the winds is generally annual, but there are isolated cases in which a semiannual variation is observed. Within the austral winter, winds measured from the South Pole show a substantial intraseasonal variation only along longitudes directed toward the magnetic pole. IMF effects are described in a companion paper.