Mount Sidley
Mount Sidley is a mountain located within the Antarctic Treaty area. At 4,181 meters in elevation, it is the highest volcano in Antarctica and is part of the Volcanic Seven Summits. It is the third most looked-up sight in Antarctica on English Wikipedia.
Planning a visit
The climate at Mount Sidley is consistently cold throughout the year. The warmest months are January and December, with daily highs around -22 °C and lows around -26 °C. Conditions become significantly colder during the winter months, with July temperatures dropping to an average high of -36 °C and a low of -42 °C. Precipitation occurs in small amounts year-round, typically falling on 1 to 4 days per month.
Mount Sidley is situated in the Executive Committee Range. As it is in the Antarctic Treaty area, travel logistics are specialized and require significant planning. The mountain is named after Maybelle E. Sidley.
Weather by month
The warmest month is January, with an average high of -22 °C. Rain is spread fairly evenly through the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high, °C | -22 | -26 | -30 | -33 | -34 | -34 | -36 | -38 | -36 | -32 | -27 | -22 |
| Average low, °C | -26 | -31 | -35 | -38 | -39 | -39 | -42 | -43 | -42 | -37 | -31 | -27 |
| Rainfall, mm | 18 | 17 | 30 | 27 | 35 | 41 | 36 | 29 | 31 | 26 | 19 | 16 |
| Rainy days | 3 | 3 | 3 | 3 | 4 | 2 | 2 | 1 | 2 | 1 | 1 | 3 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.
