I've been here in a chieftain once. 48 degrees 1000m strip, nil wind in the
goonies at max weight.
One of Pipers responses to an accident where a Navajo crashed after losing an engine on a 40 degree day was that the aircraft was not certified to operate beyond the lines on the performance chart. The lines end about 36 degrees at sea level. Piper stated that performance degraded very quickly beyond these lines and the aircraft should not be operated in these conditions.