| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 23.8° | 12.8° | 41mm | 5.6 | 89 |
| February | 23.2° | 12.9° | 34.1mm | 5.6 | 89 |
| March | 20.5° | 11.4° | 40.4mm | 7.2 | 86 |
| April | 16.6° | 9.8° | 58.1mm | 9.7 | 70 |
| May | 12.7° | 7.8° | 119mm | 15.5 | 47 |
| June | 9.9° | 5.8° | 145.3mm | 16.7 | 38 |
| July | 9.1° | 5° | 146mm | 17.9 | 35 |
| August | 10.3° | 5.3° | 133mm | 17.9 | 39 |
| September | 13.1° | 6.4° | 107.9mm | 14.6 | 49 |
| October | 16.1° | 7.7° | 62.9mm | 9.7 | 68 |
| November | 19° | 9.5° | 49.9mm | 8.8 | 79 |
| December | 21.3° | 11° | 49.4mm | 7.4 | 85 |
January in Adelaide Hills averages a daily high of 23.8°C with nights around 12.8°C. Expect roughly 5.6 wet days totalling 41mm. Comfortable conditions for being outdoors all day.
February in Adelaide Hills averages a daily high of 23.2°C with nights around 12.9°C. Expect roughly 5.6 wet days totalling 34.1mm. Comfortable conditions for being outdoors all day.
March in Adelaide Hills averages a daily high of 20.5°C with nights around 11.4°C. Expect roughly 7.2 wet days totalling 40.4mm. Comfortable conditions for being outdoors all day.
April in Adelaide Hills averages a daily high of 16.6°C with nights around 9.8°C. Expect roughly 9.7 wet days totalling 58.1mm. Generally workable, with some weather to plan around.
May in Adelaide Hills averages a daily high of 12.7°C with nights around 7.8°C. Expect roughly 15.5 wet days totalling 119mm. Demanding conditions — pack for it and plan indoor options.
June in Adelaide Hills averages a daily high of 9.9°C with nights around 5.8°C. Expect roughly 16.7 wet days totalling 145.3mm. Demanding conditions — pack for it and plan indoor options.
July in Adelaide Hills averages a daily high of 9.1°C with nights around 5°C. Expect roughly 17.9 wet days totalling 146mm. Demanding conditions — pack for it and plan indoor options.
August in Adelaide Hills averages a daily high of 10.3°C with nights around 5.3°C. Expect roughly 17.9 wet days totalling 133mm. Demanding conditions — pack for it and plan indoor options.
September in Adelaide Hills averages a daily high of 13.1°C with nights around 6.4°C. Expect roughly 14.6 wet days totalling 107.9mm. Demanding conditions — pack for it and plan indoor options.
October in Adelaide Hills averages a daily high of 16.1°C with nights around 7.7°C. Expect roughly 9.7 wet days totalling 62.9mm. Generally workable, with some weather to plan around.
November in Adelaide Hills averages a daily high of 19°C with nights around 9.5°C. Expect roughly 8.8 wet days totalling 49.9mm. Comfortable conditions for being outdoors all day.
December in Adelaide Hills averages a daily high of 21.3°C with nights around 11°C. Expect roughly 7.4 wet days totalling 49.4mm. 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. Adelaide Hills peaks at 89.
Based on 30 years of records, December–March scores highest for comfort in Adelaide Hills, balancing daytime temperature against rainfall.
January is the warmest, averaging a daily high of 23.8°C.
July is the wettest, averaging 146mm of rain across roughly 17.9 wet days.
July is the coolest month, with average daily highs around 9.1°C.