Yên Châu is a district (huyện) of Sơn La province in the Northwest region of Vietnam. As of 2019 the district had a population of 79,295. The district covers an area of 844 km2. The district capital is the eponymous Yên Châu.

Climate

Climate data for Yên Châu
MonthJanFebMarAprMayJunJulAugSepOctNovDecYear
Record high °C (°F)35.2 (95.4)37.3 (99.1)39.3 (102.7)42.4 (108.3)42.0 (107.6)39.9 (103.8)39.5 (103.1)38.4 (101.1)37.9 (100.2)36.6 (97.9)36.2 (97.2)34.4 (93.9)42.4 (108.3)
Mean daily maximum °C (°F)23.0 (73.4)25.3 (77.5)29.0 (84.2)32.3 (90.1)33.5 (92.3)33.0 (91.4)32.5 (90.5)32.0 (89.6)31.2 (88.2)29.2 (84.6)26.5 (79.7)23.8 (74.8)29.3 (84.7)
Daily mean °C (°F)16.5 (61.7)18.6 (65.5)22.1 (71.8)25.2 (77.4)26.9 (80.4)27.3 (81.1)27.1 (80.8)26.7 (80.1)25.6 (78.1)23.3 (73.9)20.0 (68.0)16.9 (62.4)23.0 (73.4)
Mean daily minimum °C (°F)12.5 (54.5)14.3 (57.7)17.4 (63.3)20.4 (68.7)22.6 (72.7)23.8 (74.8)23.8 (74.8)23.5 (74.3)22.2 (72.0)19.8 (67.6)16.1 (61.0)12.6 (54.7)19.1 (66.4)
Record low °C (°F)−1.5 (29.3)3.5 (38.3)5.3 (41.5)9.2 (48.6)15.7 (60.3)16.0 (60.8)18.3 (64.9)20.3 (68.5)14.9 (58.8)8.8 (47.8)3.7 (38.7)−0.4 (31.3)−1.5 (29.3)
Average rainfall mm (inches)13.0 (0.51)14.6 (0.57)34.6 (1.36)103.3 (4.07)152.9 (6.02)191.9 (7.56)220.5 (8.68)252.8 (9.95)144.1 (5.67)56.6 (2.23)19.6 (0.77)11.7 (0.46)1,215.3 (47.85)
Average rainy days3.02.95.311.614.816.418.217.811.47.44.02.3115.2
Average relative humidity (%)76.774.072.173.876.180.883.284.783.781.379.678.479.6
Mean monthly sunshine hours134.3136.5159.6180.4201.8154.9160.7162.2169.2155.0146.3147.81,906
Source: Vietnam Institute for Building Science and Technology

21°30′00″N 104°19′59″E/21.500°N 104.333°E/ 21.500; 104.333