| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -0.9° | -8° | 45.8mm | 11.2 | 8 |
| February | 0.9° | -6.9° | 43.5mm | 9.9 | 12 |
| March | 6.5° | -1.8° | 57.9mm | 10.6 | 30 |
| April | 12.4° | 3.1° | 95.9mm | 12.2 | 51 |
| May | 18.7° | 8.6° | 94.7mm | 12 | 72 |
| June | 24.6° | 14.6° | 108.8mm | 11.2 | 78 |
| July | 27.3° | 18° | 83mm | 9.3 | 80 |
| August | 26.5° | 17.8° | 92.7mm | 9.5 | 81 |
| September | 22.9° | 13.6° | 80.4mm | 8.1 | 84 |
| October | 16.1° | 7.1° | 70.8mm | 10.3 | 67 |
| November | 8.5° | 0.5° | 50.5mm | 9.5 | 42 |
| December | 2° | -5° | 49.5mm | 10.4 | 14 |
January in Milwaukee averages a daily high of -0.9°C with nights around -8°C. Expect roughly 11.2 wet days totalling 45.8mm. A hard month to visit for comfort alone.
February in Milwaukee averages a daily high of 0.9°C with nights around -6.9°C. Expect roughly 9.9 wet days totalling 43.5mm. A hard month to visit for comfort alone.
March in Milwaukee averages a daily high of 6.5°C with nights around -1.8°C. Expect roughly 10.6 wet days totalling 57.9mm. A hard month to visit for comfort alone.
April in Milwaukee averages a daily high of 12.4°C with nights around 3.1°C. Expect roughly 12.2 wet days totalling 95.9mm. Demanding conditions — pack for it and plan indoor options.
May in Milwaukee averages a daily high of 18.7°C with nights around 8.6°C. Expect roughly 12 wet days totalling 94.7mm. Generally workable, with some weather to plan around.
June in Milwaukee averages a daily high of 24.6°C with nights around 14.6°C. Expect roughly 11.2 wet days totalling 108.8mm. Comfortable conditions for being outdoors all day.
July in Milwaukee averages a daily high of 27.3°C with nights around 18°C. Expect roughly 9.3 wet days totalling 83mm. Comfortable conditions for being outdoors all day.
August in Milwaukee averages a daily high of 26.5°C with nights around 17.8°C. Expect roughly 9.5 wet days totalling 92.7mm. Comfortable conditions for being outdoors all day.
September in Milwaukee averages a daily high of 22.9°C with nights around 13.6°C. Expect roughly 8.1 wet days totalling 80.4mm. Comfortable conditions for being outdoors all day.
October in Milwaukee averages a daily high of 16.1°C with nights around 7.1°C. Expect roughly 10.3 wet days totalling 70.8mm. Generally workable, with some weather to plan around.
November in Milwaukee averages a daily high of 8.5°C with nights around 0.5°C. Expect roughly 9.5 wet days totalling 50.5mm. Demanding conditions — pack for it and plan indoor options.
December in Milwaukee averages a daily high of 2°C with nights around -5°C. Expect roughly 10.4 wet days totalling 49.5mm. 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. Milwaukee peaks at 84.
Based on 30 years of records, June–September scores highest for comfort in Milwaukee, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.3°C.
June is the wettest, averaging 108.8mm of rain across roughly 11.2 wet days.
January is the coolest month, with average daily highs around -0.9°C.