2008 Outback 2.5i SOHC recently replaced at 140,000 miles after a catastrophic HG failure.
It was really hot (92-97f, about 35C) the other day. Whenever I went up a long hill on the highway, the coolant temp would nudge up to the start of the red zone (110 to 117C according to bluetooth ODB dongle & Torgue Lite on my Android phone) and the A/C would blow hot air. When I leveled out or went downhill the temp would drop back to 9 o'clock (under 106c) and the A/C would start blowing cold air again. This cycle repeated whenever going up a long hill or extended idling in rush hour traffic.