Weekly Climate Summary for 23 August 2025 through 29 August 2025 UTC
South Pole Station, Antarctica

Temperature:
Average temp... -53.0°C / -63.4°F
Maximum temp... -40.9°C / -41.6°F on day 23
Minimum temp... -61.2°C / -78.2°F on day 26

Wind:
Average wind speed.......... 9.6 mph or 8.3 knots
Prevailing wind direction... Grid North
Maximum wind speed.......... 36 mph or 31 knots on day 27
Maximum wind direction...... Grid Northwest
Average vectored wind....... 049 degrees at 6.6 knots

Station Pressure:
Average pressure... 694.0 mb
Highest pressure... 701.8 mb on day 23
Lowest pressure.... 685.9 mb on day 29

Physio-altitude:
Average physio-alt = 10105 ft/ 3080 m
Highest physio-alt = 10406 ft/ 3172 m on day 29
Lowest physio-alt  =  9816 ft/ 2992 m on day 23

Sky Cover:
Average cloud cover (8ths)... 3
Days clear................... 3
Days partly cloudy........... 4
Days cloudy.................. 0

Sunshine:
Sunrise on 20 September 2025
Average hours per day... 0.0
Percent of possible..... 0

Visibility:
1 day with visibility of 1/4 mile or less.

Balloon flight data:
Number of soundings for the week..... 11
Average height of soundings.......... 137.6 mb, or 14123 meters
Highest sounding..................... 7.5 mb, or 28647 meters on day 27/00Z flight

2 soundings were missed (one of these was canceled due to extended aircraft delay)

**RECORDS**
8/23: An average wind speed of 0.7 knots breaks the previous daily record of 4.0 knots set on this day in 2018.

8/24: An average wind speed of 2.3 knots breaks the previous daily record of 3.2 knots, set on this day in 1975.