| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 14.4° | 0.3° | 5.2mm | 1.8 | 76 |
| February | 16° | 2.8° | 4mm | 2.5 | 82 |
| March | 18.4° | 5.9° | 9.6mm | 3.2 | 88 |
| April | 21.2° | 9° | 16mm | 4.6 | 91 |
| May | 23.3° | 12° | 73.8mm | 11.5 | 77 |
| June | 24.5° | 14.8° | 166.5mm | 17.2 | 70 |
| July | 23.8° | 15° | 251.2mm | 22.4 | 70 |
| August | 23.4° | 14.3° | 217.4mm | 21.7 | 70 |
| September | 22° | 12.7° | 155.9mm | 18.7 | 70 |
| October | 20.7° | 9.2° | 54.9mm | 10 | 80 |
| November | 17.7° | 3.8° | 11.5mm | 2.7 | 87 |
| December | 15.2° | 0.3° | 1.9mm | 0.9 | 80 |
January in Sanchuan averages a daily high of 14.4°C with nights around 0.3°C. Rain is rare — about 1.8 wet days and 5.2mm across the month. Comfortable conditions for being outdoors all day.
February in Sanchuan averages a daily high of 16°C with nights around 2.8°C. Rain is rare — about 2.5 wet days and 4mm across the month. Comfortable conditions for being outdoors all day.
March in Sanchuan averages a daily high of 18.4°C with nights around 5.9°C. Expect roughly 3.2 wet days totalling 9.6mm. Comfortable conditions for being outdoors all day.
April in Sanchuan averages a daily high of 21.2°C with nights around 9°C. Expect roughly 4.6 wet days totalling 16mm. Comfortable conditions for being outdoors all day.
May in Sanchuan averages a daily high of 23.3°C with nights around 12°C. Expect roughly 11.5 wet days totalling 73.8mm. Comfortable conditions for being outdoors all day.
June in Sanchuan averages a daily high of 24.5°C with nights around 14.8°C. Expect roughly 17.2 wet days totalling 166.5mm. Generally workable, with some weather to plan around.
July in Sanchuan averages a daily high of 23.8°C with nights around 15°C. Expect roughly 22.4 wet days totalling 251.2mm. Generally workable, with some weather to plan around.
August in Sanchuan averages a daily high of 23.4°C with nights around 14.3°C. Expect roughly 21.7 wet days totalling 217.4mm. Generally workable, with some weather to plan around.
September in Sanchuan averages a daily high of 22°C with nights around 12.7°C. Expect roughly 18.7 wet days totalling 155.9mm. Generally workable, with some weather to plan around.
October in Sanchuan averages a daily high of 20.7°C with nights around 9.2°C. Expect roughly 10 wet days totalling 54.9mm. Comfortable conditions for being outdoors all day.
November in Sanchuan averages a daily high of 17.7°C with nights around 3.8°C. Rain is rare — about 2.7 wet days and 11.5mm across the month. Comfortable conditions for being outdoors all day.
December in Sanchuan averages a daily high of 15.2°C with nights around 0.3°C. Rain is rare — about 0.9 wet days and 1.9mm across the month. Comfortable conditions for being outdoors all day.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Sanchuan peaks at 91.
Based on 30 years of records, March–April scores highest for comfort in Sanchuan, balancing daytime temperature against rainfall.
June is the warmest, averaging a daily high of 24.5°C.
July is the wettest, averaging 251.2mm of rain across roughly 22.4 wet days.
January is the coolest month, with average daily highs around 14.4°C.