| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 18.5° | 9.1° | 44.4mm | 6.6 | 82 |
| February | 20.2° | 11.3° | 74.8mm | 8.8 | 82 |
| March | 23° | 14.6° | 124mm | 12.4 | 75 |
| April | 26.6° | 18.9° | 233.3mm | 13.8 | 72 |
| May | 30.1° | 22.2° | 284.5mm | 16.4 | 58 |
| June | 31.7° | 24.5° | 426.9mm | 19 | 51 |
| July | 34° | 25.5° | 198.8mm | 14 | 44 |
| August | 33.6° | 25.1° | 221mm | 15.5 | 44 |
| September | 32.5° | 23.8° | 123.5mm | 9.9 | 58 |
| October | 29.5° | 20.4° | 46.9mm | 4.7 | 81 |
| November | 25.2° | 15.6° | 43.7mm | 5 | 90 |
| December | 20° | 10.2° | 33.4mm | 4.4 | 91 |
January in Heyuan averages a daily high of 18.5°C with nights around 9.1°C. Expect roughly 6.6 wet days totalling 44.4mm. Comfortable conditions for being outdoors all day.
February in Heyuan averages a daily high of 20.2°C with nights around 11.3°C. Expect roughly 8.8 wet days totalling 74.8mm. Comfortable conditions for being outdoors all day.
March in Heyuan averages a daily high of 23°C with nights around 14.6°C. Expect roughly 12.4 wet days totalling 124mm. Comfortable conditions for being outdoors all day.
April in Heyuan averages a daily high of 26.6°C with nights around 18.9°C. Expect roughly 13.8 wet days totalling 233.3mm. Generally workable, with some weather to plan around.
May in Heyuan averages a daily high of 30.1°C with nights around 22.2°C. Expect roughly 16.4 wet days totalling 284.5mm. Generally workable, with some weather to plan around.
June in Heyuan averages a daily high of 31.7°C with nights around 24.5°C. Expect roughly 19 wet days totalling 426.9mm. Demanding conditions — pack for it and plan indoor options.
July in Heyuan averages a daily high of 34°C with nights around 25.5°C. Expect roughly 14 wet days totalling 198.8mm. Demanding conditions — pack for it and plan indoor options.
August in Heyuan averages a daily high of 33.6°C with nights around 25.1°C. Expect roughly 15.5 wet days totalling 221mm. Demanding conditions — pack for it and plan indoor options.
September in Heyuan averages a daily high of 32.5°C with nights around 23.8°C. Expect roughly 9.9 wet days totalling 123.5mm. Generally workable, with some weather to plan around.
October in Heyuan averages a daily high of 29.5°C with nights around 20.4°C. Expect roughly 4.7 wet days totalling 46.9mm. Comfortable conditions for being outdoors all day.
November in Heyuan averages a daily high of 25.2°C with nights around 15.6°C. Expect roughly 5 wet days totalling 43.7mm. Comfortable conditions for being outdoors all day.
December in Heyuan averages a daily high of 20°C with nights around 10.2°C. Expect roughly 4.4 wet days totalling 33.4mm. 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. Heyuan peaks at 91.
Based on 30 years of records, November–December scores highest for comfort in Heyuan, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 34°C.
June is the wettest, averaging 426.9mm of rain across roughly 19 wet days.
January is the coolest month, with average daily highs around 18.5°C.