| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 31.8° | — | 400mm | 20.7 | 51 |
| February | 32° | — | 418.3mm | 18.5 | 50 |
| March | 31.1° | 23.2° | 411.9mm | 19 | 54 |
| April | 29.9° | — | 196.3mm | 16.7 | 58 |
| May | 27.9° | — | 86.5mm | 14.2 | 68 |
| June | 26.8° | — | 47.6mm | 10.6 | 79 |
| July | 26.4° | — | 35.5mm | 8.8 | 82 |
| August | 27.3° | — | 28mm | 7.8 | 83 |
| September | 28.9° | — | 27.2mm | 7.1 | 78 |
| October | 30.1° | — | 68.9mm | 9.4 | 69 |
| November | 31.2° | — | 85.1mm | 11.5 | 60 |
| December | 31.9° | — | 195.3mm | 14.8 | 51 |
January in Cairns averages a daily high of 31.8°C. Expect roughly 20.7 wet days totalling 400mm. Demanding conditions — pack for it and plan indoor options.
February in Cairns averages a daily high of 32°C. Expect roughly 18.5 wet days totalling 418.3mm. Demanding conditions — pack for it and plan indoor options.
March in Cairns averages a daily high of 31.1°C with nights around 23.2°C. Expect roughly 19 wet days totalling 411.9mm. Demanding conditions — pack for it and plan indoor options.
April in Cairns averages a daily high of 29.9°C. Expect roughly 16.7 wet days totalling 196.3mm. Generally workable, with some weather to plan around.
May in Cairns averages a daily high of 27.9°C. Expect roughly 14.2 wet days totalling 86.5mm. Generally workable, with some weather to plan around.
June in Cairns averages a daily high of 26.8°C. Expect roughly 10.6 wet days totalling 47.6mm. Comfortable conditions for being outdoors all day.
July in Cairns averages a daily high of 26.4°C. Expect roughly 8.8 wet days totalling 35.5mm. Comfortable conditions for being outdoors all day.
August in Cairns averages a daily high of 27.3°C. Expect roughly 7.8 wet days totalling 28mm. Comfortable conditions for being outdoors all day.
September in Cairns averages a daily high of 28.9°C. Expect roughly 7.1 wet days totalling 27.2mm. Comfortable conditions for being outdoors all day.
October in Cairns averages a daily high of 30.1°C. Expect roughly 9.4 wet days totalling 68.9mm. Generally workable, with some weather to plan around.
November in Cairns averages a daily high of 31.2°C. Expect roughly 11.5 wet days totalling 85.1mm. Generally workable, with some weather to plan around.
December in Cairns averages a daily high of 31.9°C. Expect roughly 14.8 wet days totalling 195.3mm. 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. Cairns peaks at 83.
Based on 30 years of records, June–September scores highest for comfort in Cairns, balancing daytime temperature against rainfall.
February is the warmest, averaging a daily high of 32°C.
February is the wettest, averaging 418.3mm of rain across roughly 18.5 wet days.
July is the coolest month, with average daily highs around 26.4°C.