Don't kid yourself. All year is the hot season. We went in early Feb and about died of the heat. I had 2 to 3 showers a day as the only way I could cool down was with cool water over my head. My insane and antsy husband went out in the afternoon when everyone else was resting and taking cover, inc the guides.

We were there in 1991 when it first opened after the Vietnamese left. What I would like to know is whether the potentially wonderful museum in Phnom Penh has been renovated. It was like visiting a ruin when we were there. Much of it was open air, sometimes not by design so it was a hot slog to go through it.