| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -1.5° | -9.6° | 50.3mm | 10.7 | 9 |
| February | 0.5° | -9.2° | 50.4mm | 9.1 | 12 |
| March | 7.4° | -2.7° | 58.1mm | 10 | 33 |
| April | 14.6° | 3.1° | 98mm | 12.9 | 57 |
| May | 20.3° | 9.3° | 131.3mm | 14 | 72 |
| June | 25.3° | 14.7° | 119mm | 12.3 | 75 |
| July | 27.4° | 17.1° | 109.6mm | 10 | 78 |
| August | 26.4° | 16.4° | 113.8mm | 10.8 | 78 |
| September | 22.9° | 12.4° | 90.4mm | 9.6 | 81 |
| October | 15.8° | 5.7° | 85.3mm | 11.6 | 63 |
| November | 8.3° | -0.8° | 56.6mm | 10 | 38 |
| December | 1.4° | -6.7° | 56.6mm | 10.8 | 10 |
January in Hoffman Estates averages a daily high of -1.5°C with nights around -9.6°C. Expect roughly 10.7 wet days totalling 50.3mm. A hard month to visit for comfort alone.
February in Hoffman Estates averages a daily high of 0.5°C with nights around -9.2°C. Expect roughly 9.1 wet days totalling 50.4mm. A hard month to visit for comfort alone.
March in Hoffman Estates averages a daily high of 7.4°C with nights around -2.7°C. Expect roughly 10 wet days totalling 58.1mm. A hard month to visit for comfort alone.
April in Hoffman Estates averages a daily high of 14.6°C with nights around 3.1°C. Expect roughly 12.9 wet days totalling 98mm. Generally workable, with some weather to plan around.
May in Hoffman Estates averages a daily high of 20.3°C with nights around 9.3°C. Expect roughly 14 wet days totalling 131.3mm. Generally workable, with some weather to plan around.
June in Hoffman Estates averages a daily high of 25.3°C with nights around 14.7°C. Expect roughly 12.3 wet days totalling 119mm. Comfortable conditions for being outdoors all day.
July in Hoffman Estates averages a daily high of 27.4°C with nights around 17.1°C. Expect roughly 10 wet days totalling 109.6mm. Comfortable conditions for being outdoors all day.
August in Hoffman Estates averages a daily high of 26.4°C with nights around 16.4°C. Expect roughly 10.8 wet days totalling 113.8mm. Comfortable conditions for being outdoors all day.
September in Hoffman Estates averages a daily high of 22.9°C with nights around 12.4°C. Expect roughly 9.6 wet days totalling 90.4mm. Comfortable conditions for being outdoors all day.
October in Hoffman Estates averages a daily high of 15.8°C with nights around 5.7°C. Expect roughly 11.6 wet days totalling 85.3mm. Generally workable, with some weather to plan around.
November in Hoffman Estates averages a daily high of 8.3°C with nights around -0.8°C. Expect roughly 10 wet days totalling 56.6mm. Demanding conditions — pack for it and plan indoor options.
December in Hoffman Estates averages a daily high of 1.4°C with nights around -6.7°C. Expect roughly 10.8 wet days totalling 56.6mm. 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. Hoffman Estates peaks at 81.
Based on 30 years of records, June–September scores highest for comfort in Hoffman Estates, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.4°C.
May is the wettest, averaging 131.3mm of rain across roughly 14 wet days.
January is the coolest month, with average daily highs around -1.5°C.