| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 7.3° | 1.7° | 28mm | 14 | 31 |
| February | 11.2° | 3.8° | 26.1mm | 12 | 48 |
| March | 15.7° | 7.5° | 45.7mm | 13.1 | 60 |
| April | 20.7° | 12.1° | 96.2mm | 14.1 | 72 |
| May | 23.8° | 15.6° | 176.7mm | 16.2 | 70 |
| June | 25.5° | 18.5° | 226.5mm | 16.8 | 70 |
| July | 27.7° | 20.3° | 195.6mm | 13.9 | 69 |
| August | 27.9° | 19.7° | 127.4mm | 11.7 | 73 |
| September | 25.3° | 16.8° | 81mm | 9.5 | 81 |
| October | 19.9° | 13.3° | 93mm | 14.2 | 71 |
| November | 15.7° | 8.5° | 36.7mm | 9.5 | 67 |
| December | 10° | 3.4° | 20.6mm | 11 | 46 |
January in Guiyang averages a daily high of 7.3°C with nights around 1.7°C. Expect roughly 14 wet days totalling 28mm. A hard month to visit for comfort alone.
February in Guiyang averages a daily high of 11.2°C with nights around 3.8°C. Expect roughly 12 wet days totalling 26.1mm. Demanding conditions — pack for it and plan indoor options.
March in Guiyang averages a daily high of 15.7°C with nights around 7.5°C. Expect roughly 13.1 wet days totalling 45.7mm. Generally workable, with some weather to plan around.
April in Guiyang averages a daily high of 20.7°C with nights around 12.1°C. Expect roughly 14.1 wet days totalling 96.2mm. Generally workable, with some weather to plan around.
May in Guiyang averages a daily high of 23.8°C with nights around 15.6°C. Expect roughly 16.2 wet days totalling 176.7mm. Generally workable, with some weather to plan around.
June in Guiyang averages a daily high of 25.5°C with nights around 18.5°C. Expect roughly 16.8 wet days totalling 226.5mm. Generally workable, with some weather to plan around.
July in Guiyang averages a daily high of 27.7°C with nights around 20.3°C. Expect roughly 13.9 wet days totalling 195.6mm. Generally workable, with some weather to plan around.
August in Guiyang averages a daily high of 27.9°C with nights around 19.7°C. Expect roughly 11.7 wet days totalling 127.4mm. Generally workable, with some weather to plan around.
September in Guiyang averages a daily high of 25.3°C with nights around 16.8°C. Expect roughly 9.5 wet days totalling 81mm. Comfortable conditions for being outdoors all day.
October in Guiyang averages a daily high of 19.9°C with nights around 13.3°C. Expect roughly 14.2 wet days totalling 93mm. Generally workable, with some weather to plan around.
November in Guiyang averages a daily high of 15.7°C with nights around 8.5°C. Expect roughly 9.5 wet days totalling 36.7mm. Generally workable, with some weather to plan around.
December in Guiyang averages a daily high of 10°C with nights around 3.4°C. Expect roughly 11 wet days totalling 20.6mm. Demanding conditions — pack for it and plan indoor options.
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. Guiyang peaks at 81.
Based on 30 years of records, August–September scores highest for comfort in Guiyang, balancing daytime temperature against rainfall.
August is the warmest, averaging a daily high of 27.9°C.
June is the wettest, averaging 226.5mm of rain across roughly 16.8 wet days.
January is the coolest month, with average daily highs around 7.3°C.