Peak tourist season in Cambodia falls between late November and January, which is relatively cool by Cambodian standards with temperatures in the mid to high twenties. November attracts visitors for the annual Water Festival in Phnom Penh with its long boat races along the Tonle Sap river. Some bike trails which are impassable during the rainy season also dry out at this time of year.
From March onwards things heat up, reaching above thirty-five degrees around Khmer New Year in mid April. During New Year itself the whole country is in a festive mood, with celebrations in virtually every village. After Khmer New Year is typically when the heat finally pops and the monsoon begins.
Although some routes are flooded during the rainy season, most run all year round. One of the best kept secrets is that rainy season can actually be a very pleasant time to visit, with sunny blue skies, lush green jungle and rice paddies, and fewer tourists..not to mention the cheaper flights! The monsoon storms themselves are pretty predictable and rarely last longer than an hour or so., so if you’re the kind of person who wants to see a different side to Cambodia and doesn’t mind a bit of mud, it’s definitely a great time to come.