Annual Weather Averages in McMurdo
McMurdo is 1118 miles from Mount Siple, so the actual climate in Mount Siple can vary a bit.
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in Mount Siple
High Temp: 32 °F
Low Temp: -21 °F
Mean Temp: 3 °F
Precipitation: 0.42"
Humidity: 59%
Dew Point: -9 °F
Wind: 21 mph
Pressure: 29.17 "Hg
Visibility: 6 mi
January Climate & Weather Averages in Mount Siple
High Temp: 32 °F
Low Temp: 22 °F
Mean Temp: 27 °F
Precipitation: 0.44"
Humidity: 66%
Dew Point: 17 °F
Wind: 18 mph
Pressure: 29.23 "Hg
Visibility: 6 mi
February Climate & Weather Averages in Mount Siple
High Temp: 22 °F
Low Temp: 11 °F
Mean Temp: 16 °F
Precipitation: 0.38"
Humidity: 57%
Dew Point: 4 °F
Wind: 22 mph
Pressure: 29.17 "Hg
Visibility: 6 mi
March Climate & Weather Averages in Mount Siple
High Temp: 8 °F
Low Temp: -5 °F
Mean Temp: 1 °F
Precipitation: 0.58"
Humidity: 60%
Dew Point: -10 °F
Wind: 25 mph
Pressure: 29.18 "Hg
Visibility: 6 mi
April Climate & Weather Averages in Mount Siple
High Temp: -1 °F
Low Temp: -15 °F
Mean Temp: -8 °F
Precipitation: 0.39"
Humidity: 59%
Dew Point: -18 °F
Wind: 20 mph
Pressure: 29.19 "Hg
Visibility: 6 mi
May Climate & Weather Averages in Mount Siple
High Temp: 1 °F
Low Temp: -13 °F
Mean Temp: -6 °F
Precipitation: 0.37"
Humidity: 61%
Dew Point: -16 °F
Wind: 22 mph
Pressure: 29.18 "Hg
Visibility: 6 mi
June Climate & Weather Averages in Mount Siple
High Temp: -3 °F
Low Temp: -18 °F
Mean Temp: -10 °F
Precipitation: 0.30"
Humidity: 58%
Dew Point: -21 °F
Wind: 22 mph
Pressure: 29.22 "Hg
Visibility: 6 mi
July Climate & Weather Averages in Mount Siple
High Temp: -6 °F
Low Temp: -21 °F
Mean Temp: -14 °F
Precipitation: 0.40"
Humidity: 58%
Dew Point: -24 °F
Wind: 20 mph
Pressure: 29.22 "Hg
Visibility: 6 mi
August Climate & Weather Averages in Mount Siple
High Temp: -4 °F
Low Temp: -20 °F
Mean Temp: -12 °F
Precipitation: 0.51"
Humidity: 59%
Dew Point: -22 °F
Wind: 23 mph
Pressure: 29.22 "Hg
Visibility: 5 mi
September Climate & Weather Averages in Mount Siple
High Temp: -2 °F
Low Temp: -17 °F
Mean Temp: -9 °F
Precipitation: 0.67"
Humidity: 56%
Dew Point: -21 °F
Wind: 22 mph
Pressure: 29.08 "Hg
Visibility: 6 mi
October Climate & Weather Averages in Mount Siple
High Temp: 9 °F
Low Temp: -4 °F
Mean Temp: 2 °F
Precipitation: 0.49"
Humidity: 57%
Dew Point: -9 °F
Wind: 22 mph
Pressure: 29.05 "Hg
Visibility: 6 mi
November Climate & Weather Averages in Mount Siple
High Temp: 22 °F
Low Temp: 10 °F
Mean Temp: 16 °F
Precipitation: 0.27"
Humidity: 56%
Dew Point: 2 °F
Wind: 19 mph
Pressure: 29.13 "Hg
Visibility: 7 mi
December Climate & Weather Averages in Mount Siple
High Temp: 32 °F
Low Temp: 22 °F
Mean Temp: 27 °F
Precipitation: 0.26"
Humidity: 64%
Dew Point: 16 °F
Wind: 17 mph
Pressure: 29.19 "Hg
Visibility: 6 mi