Guiyang is warmest in August, averaging 28° by day and 19° at night. The wettest month is June with 303 mm, and the year brings about 1387 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 10° | 0° | 56 mm | 10.5 h | Cool |
| February | 13° | 2° | 45 mm | 11.1 h | Mild |
| March | 19° | 7° | 59 mm | 11.8 h | Sightseeing |
| April | 22° | 11° | 129 mm | 12.6 h | Mild |
| May | 25° | 15° | 217 mm | 13.3 h | Rainy season |
| June | 26° | 18° | 303 mm | 13.7 h | Rainy season |
| July | 27° | 19° | 186 mm | 13.5 h | Rainy season |
| August | 28° | 19° | 112 mm | 12.9 h | Mild |
| September | 26° | 16° | 141 mm | 12.1 h | Mild |
| October | 20° | 12° | 87 mm | 11.4 h | Sightseeing |
| November | 17° | 7° | 33 mm | 10.7 h | Sightseeing |
| December | 10° | 1° | 19 mm | 10.3 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: No month in Guiyang combines swimming warmth with dry skies.
Walking the city: March, October and November — highs of 17–20° and no more than 87 mm of rain a month.
Wet season: May, June and July — up to 303 mm in a single month.