| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -0.3° | -8.6° | 64.1mm | 10.7 | 9 |
| February | 2.1° | -7° | 54.4mm | 8.9 | 14 |
| March | 8.2° | -1.7° | 67.3mm | 10.3 | 36 |
| April | 15.3° | 3.9° | 101mm | 12 | 61 |
| May | 21.3° | 9.9° | 123.3mm | 13.4 | 73 |
| June | 27° | 15.4° | 122.2mm | 10.3 | 79 |
| July | 28.9° | 18° | 123.6mm | 9.1 | 74 |
| August | 27.9° | 17.1° | 101.3mm | 8.9 | 79 |
| September | 24.8° | 13.2° | 82.2mm | 8.2 | 84 |
| October | 17.6° | 6.5° | 96mm | 11 | 70 |
| November | 9.5° | 0.3° | 65.7mm | 9.2 | 45 |
| December | 2.6° | -5.3° | 63.1mm | 11.1 | 12 |
January in Tinley Park averages a daily high of -0.3°C with nights around -8.6°C. Expect roughly 10.7 wet days totalling 64.1mm. A hard month to visit for comfort alone.
February in Tinley Park averages a daily high of 2.1°C with nights around -7°C. Expect roughly 8.9 wet days totalling 54.4mm. A hard month to visit for comfort alone.
March in Tinley Park averages a daily high of 8.2°C with nights around -1.7°C. Expect roughly 10.3 wet days totalling 67.3mm. Demanding conditions — pack for it and plan indoor options.
April in Tinley Park averages a daily high of 15.3°C with nights around 3.9°C. Expect roughly 12 wet days totalling 101mm. Generally workable, with some weather to plan around.
May in Tinley Park averages a daily high of 21.3°C with nights around 9.9°C. Expect roughly 13.4 wet days totalling 123.3mm. Generally workable, with some weather to plan around.
June in Tinley Park averages a daily high of 27°C with nights around 15.4°C. Expect roughly 10.3 wet days totalling 122.2mm. Comfortable conditions for being outdoors all day.
July in Tinley Park averages a daily high of 28.9°C with nights around 18°C. Expect roughly 9.1 wet days totalling 123.6mm. Generally workable, with some weather to plan around.
August in Tinley Park averages a daily high of 27.9°C with nights around 17.1°C. Expect roughly 8.9 wet days totalling 101.3mm. Comfortable conditions for being outdoors all day.
September in Tinley Park averages a daily high of 24.8°C with nights around 13.2°C. Expect roughly 8.2 wet days totalling 82.2mm. Comfortable conditions for being outdoors all day.
October in Tinley Park averages a daily high of 17.6°C with nights around 6.5°C. Expect roughly 11 wet days totalling 96mm. Generally workable, with some weather to plan around.
November in Tinley Park averages a daily high of 9.5°C with nights around 0.3°C. Expect roughly 9.2 wet days totalling 65.7mm. Demanding conditions — pack for it and plan indoor options.
December in Tinley Park averages a daily high of 2.6°C with nights around -5.3°C. Expect roughly 11.1 wet days totalling 63.1mm. A hard month to visit for comfort alone.
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. Tinley Park peaks at 84.
Based on 30 years of records, August–September scores highest for comfort in Tinley Park, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 28.9°C.
July is the wettest, averaging 123.6mm of rain across roughly 9.1 wet days.
January is the coolest month, with average daily highs around -0.3°C.