Climate data for Bernardo O'Higgins Base (Chile), Antarctica (1961–1990, extremes 1953–present) Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Record high °C (°F) 12.0 (53.6) 10.0 (50) 11.4 (52.5) 5.0 (41) 11.5 (52.7) 10.6 (51.1) 7.0 (44.6) 12.8 (55) 14.0 (57.2) 9.2 (48.6) 9.2 (48.6) 10.0 (50) 14.0 (57.2) Daily mean °C (°F) 0.5 (32.9) 0.1 (32.2) −1.4 (29.5) −4.1 (24.6) −6.3 (20.7) −8.0 (17.6) −8.5 (16.7) −8.4 (16.9) −5.6 (21.9) −3.5 (25.7) −1.7 (28.9) 0.1 (32.2) −3.9 (25) Record low °C (°F) −10.1 (13.8) −14.0 (6.8) −20.0 (−4) −25.0 (−13) −30.0 (−22) −34.2 (−29.6) −34.4 (−29.9) −33.2 (−27.8) −29.2 (−20.6) −26.0 (−14.8) −15.0 (5) −10.6 (12.9) −34.4 (−29.9) Average precipitation mm (inches) 28.9 (1.138) 64.0 (2.52) 74.1 (2.917) 78.0 (3.071) 66.7 (2.626) 50.7 (1.996) 65.5 (2.579) 67.2 (2.646) 87.7 (3.453) 87.1 (3.429) 61.9 (2.437) 38.7 (1.524) 770.5 (30.335) Average relative humidity (%) 81 84 83 81 84 82 82 81 82 81 80 81 82 Mean monthly sunshine hours 105 83 35 28 18 11 15 29 46 73 92 111 646 Source #1: NOAA[3] Source #2: Dirección Meteorológica de Chile (extremes),[4] Deutscher Wetterdienst (sun, 1961–1990)[5][lower-alpha 1]