1-4 SUNSHINE HOURS BY ZONE(1999) |
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| (hour) | |||||||||||||
| Zone | January | February | March | April | May | June | July | August | September | October | November | December | Annual Average |
| The Northwest Part of Sichuan Basin | 94.5 | 88.5 | 91.8 | 106.1 | 115.4 | 71.9 | 140.6 | 129.6 | 79.3 | 52.4 | 49.4 | 99.4 | 1 118.5 |
| The Northeast Part of Sichuan Basin | 45.3 | 77.7 | 52.8 | 113.9 | 136.5 | 83.3 | 156.4 | 212.3 | 150.8 | 51.3 | 58.9 | 60.3 | 1 200.1 |
| The Central Part of Sichuan Basin | 47.6 | 53.8 | 77.0 | 112.4 | 109.6 | 63.2 | 139.2 | 156.4 | 137.8 | 46.1 | 46.0 | 43.6 | 1 032.3 |
| The Southwest Part of Sichuan Basin | 44.0 | 54.4 | 87.9 | 102.0 | 100.8 | 67.4 | 124.8 | 99.0 | 88.2 | 46.3 | 21.4 | 73.7 | 909.8 |
| The Southeast Part of Sichuan Basin | 36.0 | 63.8 | 96.7 | 106.3 | 109.6 | 62.1 | 146.4 | 158.6 | 127.1 | 28.1 | 34.9 | 57.4 | 1 026.9 |
| The Northwest Part of Plateau Region in the Northwest Part of Sichuan | 228.6 | 184.9 | 193.8 | 205.4 | 177.4 | 158.7 | 179.3 | 178.5 | 203.0 | 156.9 | 187.6 | 225.5 | 2 279.4 |
| The Northeast Part of Plateau Region in the Northwest Part of Sichuan | 215.2 | 172.9 | 169.8 | 196.1 | 175.2 | 130.0 | 138.4 | 172.5 | 198.2 | 126.4 | 201.8 | 197.6 | 2 093.8 |
| The South Part of Plateau Region in the Northwest Part of Sichuan | 277.6 | 252.1 | 269.4 | 240.7 | 156.7 | 171.4 | 145.2 | 126.7 | 159.0 | 200.8 | 226.2 | 262.0 | 2 487.6 |
| The North Part of Mountainous Region in the Southwest Part of Sichuan | 169.1 | 156.2 | 199.6 | 185.0 | 108.2 | 101.3 | 133.1 | 146.6 | 176.3 | 88.4 | 126.5 | 143.5 | 1 733.5 |
| The South Part of Mountainous Region in the Southwest Part of Sichuan | 244.3 | 258.2 | 278.0 | 264.0 | 195.0 | 231.1 | 162.1 | 176.5 | 170.3 | 189.4 | 181.6 | 168.4 | 2 518.6 |