Rainy season is from May to October. Winter is from November to February and summer is form March to April.
Flora and fauna
Mixed deciduous forest, deciduous dipterocarp forest, hill evergreen forest and coniferous forest blankets the national park with various plants such as Toona ciliata, Cinnamomum iners, Hopea odorata, Lagerstroemia calyculata, Tectona grandis, Xylia xylocarpa, Pterocarpus macrocarpus, Invingia malayana, Shorea obtusa, S.siamensis, Dipterocarpus obtusifolius, D. tuberculatus and Dalbergia oliveri. Also various bamboo, fern and palm can be found at the lower part of the National Park.
The parks is a safe heaven for wildlife including several mammals such as Tiger, Sambar Deer, Asiatic Black Bear, Macaque, Common Wild Boar, Siamese Hare and Common Muntjak as well as different birds such as Duck, Coucal, Bulbul, Egret and Barbet.
Attractions in Si Lanna National Park
Mon Hin Lai Waterfall
Mon Hin Lai Waterfall, is situated at Huai Mae Paeng in Chiang Mai. The 6 level waterfall is full of water all year round and creates spectacular view.