The 10-day span for Phnom Penh runs from a high near 93° on Sunday down to 75° overnight on Wednesday. Roughly 0.33 in of rain falls over the period, with Wednesday the most likely wet day (74%). Wind is the one to watch: gusts to 27 mph around Wednesday. Longer view: a tropical climate — warm all year, with the calendar split into wet and dry rather than hot and cold.
Phnom Penh, Cambodia · 11.56°N, 104.92°E · Asia/Phnom_Penh · Forecast computed for these exact coordinates