The city lies on the west bank of the Uruguay River, opposite Bella Unión, Uruguay, about 440 km east-southeast of the provincial capital (Corrientes) and 640 km north of  Buenos Aires.
Climate
More information Climate data for Monte Caseros (1991–2020, extremes 1961–present), Month ...
| Climate data for Monte Caseros (1991–2020, extremes 1961–present) | 
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | 
| Record high °C (°F) | 41.7 (107.1)
 | 42.1 (107.8)
 | 40.6 (105.1)
 | 39.1 (102.4)
 | 33.7 (92.7)
 | 30.9 (87.6)
 | 31.6 (88.9)
 | 35.8 (96.4)
 | 37.0 (98.6)
 | 38.3 (100.9)
 | 39.8 (103.6)
 | 41.0 (105.8)
 | 42.1 (107.8)
 | 
| Mean daily maximum °C (°F) | 32.4 (90.3)
 | 31.2 (88.2)
 | 29.6 (85.3)
 | 25.8 (78.4)
 | 21.7 (71.1)
 | 19.3 (66.7)
 | 18.9 (66.0)
 | 21.7 (71.1)
 | 23.1 (73.6)
 | 25.8 (78.4)
 | 28.7 (83.7)
 | 31.1 (88.0)
 | 25.8 (78.4)
 | 
| Daily mean °C (°F) | 26.2 (79.2)
 | 25.1 (77.2)
 | 23.3 (73.9)
 | 19.9 (67.8)
 | 16.2 (61.2)
 | 13.9 (57.0)
 | 13.1 (55.6)
 | 15.1 (59.2)
 | 17.0 (62.6)
 | 20.0 (68.0)
 | 22.6 (72.7)
 | 24.9 (76.8)
 | 19.8 (67.6)
 | 
| Mean daily minimum °C (°F) | 20.6 (69.1)
 | 20.0 (68.0)
 | 18.3 (64.9)
 | 15.3 (59.5)
 | 12.0 (53.6)
 | 9.8 (49.6)
 | 8.8 (47.8)
 | 10.1 (50.2)
 | 11.9 (53.4)
 | 14.9 (58.8)
 | 16.8 (62.2)
 | 19.1 (66.4)
 | 14.8 (58.6)
 | 
| Record low °C (°F) | 10.8 (51.4)
 | 9.5 (49.1)
 | 5.8 (42.4)
 | 3.2 (37.8)
 | −1.2 (29.8)
 | −4.0 (24.8)
 | −3.7 (25.3)
 | −2.2 (28.0)
 | −0.1 (31.8)
 | 3.9 (39.0)
 | 5.9 (42.6)
 | 7.3 (45.1)
 | −4.0 (24.8)
 | 
| Average precipitation mm (inches) | 157.4 (6.20)
 | 140.6 (5.54)
 | 136.8 (5.39)
 | 197.2 (7.76)
 | 114.7 (4.52)
 | 82.3 (3.24)
 | 61.7 (2.43)
 | 64.5 (2.54)
 | 91.9 (3.62)
 | 157.6 (6.20)
 | 149.1 (5.87)
 | 167.3 (6.59)
 | 1,521.1 (59.89)
 | 
| Average precipitation days (≥ 0.1 mm) | 8.8 | 8.1 | 8.0 | 9.1 | 8.4 | 7.6 | 6.4 | 5.6 | 7.8 | 10.3 | 8.1 | 9.1 | 97.2 | 
| Average relative humidity (%) | 68.4 | 72.5 | 74.6 | 78.0 | 81.1 | 81.5 | 78.3 | 73.7 | 72.5 | 73.0 | 68.1 | 67.5 | 74.1 | 
| Mean monthly sunshine hours | 285.9 | 232.7 | 241.8 | 188.9 | 178.1 | 146.7 | 165.0 | 178.6 | 188.8 | 224.8 | 256.9 | 271.5 | 2,594.8 | 
| Percentage possible sunshine | 66 | 64 | 62 | 61 | 59 | 51 | 51 | 52 | 53 | 61 | 64 | 66 | 59 | 
| Source 1: Servicio Meteorológico Nacional[1][2][3] | 
| Source 2: World Meteorological Organization (sunshine hours 1981–2010),[4] NOAA (percent sun 1961–1990)[5] | 
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