Lalmonirhat District (Rangpur division) with an area of 1241.46 sq km, is bounded by Kuchbihar and Jalpaiguri districts of West Bengal (India) on the north, rangpur district on the south, kurigram district and Kuchbihar district of West Bengal on the east, Nilphamari and Rangpur districts on the west. The district is striped shape. Main rivers 7, most noted of which are Tista, Dharla and Saniajan. The river Saniajan originating from the Himalaya has strong current. Sarnamati, Trimohoni, Ratnai and Sati rivers are almost silted. The biggest irrigation project of the country, Tista Barrage Project (length 615 m) is located at Doani of Hatibandha upazila. Temperature: highest 32.3 oC, lowest 11.2 oC; total rainfall 2931 mm.