| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 5.3° | -3.7° | 15.8mm | 3.5 | 37 |
| February | 7.7° | -1.2° | 22.4mm | 4.1 | 48 |
| March | 13.4° | 3.5° | 32.7mm | 5.3 | 68 |
| April | 19.5° | 9.3° | 44mm | 5.7 | 87 |
| May | 25.1° | 15.1° | 65.6mm | 6.7 | 87 |
| June | 28.1° | 20.2° | 117.9mm | 7 | 82 |
| July | 30.2° | 23.8° | 288.6mm | 12.4 | 62 |
| August | 30° | 23.5° | 236.1mm | 11.7 | 65 |
| September | 26.4° | 18.6° | 95.9mm | 7 | 86 |
| October | 21.6° | 12.1° | 32.9mm | 4.7 | 91 |
| November | 14.6° | 5° | 27.8mm | 4.6 | 74 |
| December | 7.5° | -1.7° | 17.9mm | 3.2 | 48 |
January in Haizhou averages a daily high of 5.3°C with nights around -3.7°C. Expect roughly 3.5 wet days totalling 15.8mm. Demanding conditions — pack for it and plan indoor options.
February in Haizhou averages a daily high of 7.7°C with nights around -1.2°C. Expect roughly 4.1 wet days totalling 22.4mm. Demanding conditions — pack for it and plan indoor options.
March in Haizhou averages a daily high of 13.4°C with nights around 3.5°C. Expect roughly 5.3 wet days totalling 32.7mm. Generally workable, with some weather to plan around.
April in Haizhou averages a daily high of 19.5°C with nights around 9.3°C. Expect roughly 5.7 wet days totalling 44mm. Comfortable conditions for being outdoors all day.
May in Haizhou averages a daily high of 25.1°C with nights around 15.1°C. Expect roughly 6.7 wet days totalling 65.6mm. Comfortable conditions for being outdoors all day.
June in Haizhou averages a daily high of 28.1°C with nights around 20.2°C. Expect roughly 7 wet days totalling 117.9mm. Comfortable conditions for being outdoors all day.
July in Haizhou averages a daily high of 30.2°C with nights around 23.8°C. Expect roughly 12.4 wet days totalling 288.6mm. Generally workable, with some weather to plan around.
August in Haizhou averages a daily high of 30°C with nights around 23.5°C. Expect roughly 11.7 wet days totalling 236.1mm. Generally workable, with some weather to plan around.
September in Haizhou averages a daily high of 26.4°C with nights around 18.6°C. Expect roughly 7 wet days totalling 95.9mm. Comfortable conditions for being outdoors all day.
October in Haizhou averages a daily high of 21.6°C with nights around 12.1°C. Expect roughly 4.7 wet days totalling 32.9mm. Comfortable conditions for being outdoors all day.
November in Haizhou averages a daily high of 14.6°C with nights around 5°C. Expect roughly 4.6 wet days totalling 27.8mm. Generally workable, with some weather to plan around.
December in Haizhou averages a daily high of 7.5°C with nights around -1.7°C. Expect roughly 3.2 wet days totalling 17.9mm. 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. Haizhou peaks at 91.
Based on 30 years of records, April–May scores highest for comfort in Haizhou, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 30.2°C.
July is the wettest, averaging 288.6mm of rain across roughly 12.4 wet days.
January is the coolest month, with average daily highs around 5.3°C.