Monthly Climate Summary for June 2007 
South Pole Station, Antarctica

Temperature:
Average temp............ -52.0C / -61.6F
Departure from normal... +6.6C / +11.9F
Maximum temp............ -40.7C / -41.3F on day 20 
Minimum temp............ -68.1C / -90.6F on day 26 

Wind:
Average wind speed.......... 17.0 mph or 14.8 knots
Prevailing wind direction... Grid Northeast or 030 degrees
Maximum wind speed.......... 40 mph or 35 knots on day 28
Maximum wind direction...... Grid Northeast 
Average vectored wind....... 028 degrees at 13.6 knots

Station Pressure:
Average pressure........ 684.2 mb or 20.204 in. Hg
Departure from normal... +3.2 mb or +0.094 in. Hg
Highest pressure........ 699.0 mb or 20.641 in. Hg on day 06
Lowest pressure......... 658.3 mb or 19.440 in. Hg on day 27

Physio-altitude:
Average Physio-alt = 10470 ft / 3191 m
Highest Physio-alt = 11458 ft / 3492 m on day 27
Lowest Physio-alt  = 9920 ft / 3023 m on day 06

Sky Cover:
Average cloud cover (8ths)... 06
Days clear................... 02
Days partly cloudy........... 14
Days cloudy.................. 14

Sunshine:
Sunrise on 21 September 2007
Average hours per day... 0.0
Percent of possible..... 0

Visibility... 10 days with a visibility of 1/4 mile or less.

Snowfall..... Trace; average net change at snow stakes +2.565 inches.

Balloon flight data:
Number of soundings for the month... 30 
Average height of sounding.......... 94.8 mb or 16028 meters above msl
Highest sounding.................... 13.4 mb or 25588 meters above msl
                                     on the day 30 /00Z sounding

Remarks:
00 soundings were missed.
07 soundings were terminated above 50 mb.
05 soundings were terminated between 50 and 100 mb.
18 soundings were terminated below 100 mb.

**RECORDS**
Day 27 - The peak wind speed of 33 kts/38 mph tied the record previously set in 1987.
Day 28 - The peak wind speed of 35 kts/40 mph broke the previous record of 28 kts/32 mph set in 2001.
Day 28 - The average daily wind speed of 20.8 kts/23.9 mph broke the previous record of 18.7 kts/21.5 mph set in 1963.
Day 30 - The maximum temperature of -44.3C/-47.7F broke the previous record of -47.5C/-53.5F set in 1973.
The monthly average temperature of -52.0C/-61.6F makes this the warmest June on record, breaking the previous record of -52.6C/-62.7F set in 1965.
The average sky cover of 6 oktas (eighths) tied the record for highest sky cover amount in June last set in 1990. 
The number of clear days this month (2 days) was a record low for June, breaking the previous record of 3 days last set in 1990. 
The average monthly change at the snow stake field of +2.565 inches was a record accumulation for June, breaking the previous record of 2.20 inches set in 1962.

Prepared by: John Gallagher and Tim Markle