| January | High near 31F, cloudiest month, heavy snow | Skating, hockey, museums | Cheapest rooms of the year. Dark by late afternoon |
| February | Cold, snowy, slightly brighter | Same as January, plus the Christmas display has gone | The quietest month. Good for a museum weekend |
| March | High near 44F, around 8 inches of snow | Butterflies begin 1 March | Grey outdoors, superb indoors. Busy at Meijer Gardens |
| April | Climbing into the high fifties | Butterflies through the 30th | Underrated. Patios start opening late in the month |
| May | High fifties to high sixties | Tulip week in Holland early in the month | Excellent, apart from the traffic west |
| June | Warm, humid, long evenings | Outdoor concerts begin | The lake is still cold. The city is at its greenest |
| July | High near 81F, afternoon storms | Festivals, beer gardens | Best lake weather, worst lake traffic |
| August | As July, slightly drier | Outdoor programme continues | Good, and quieter than July |
| September | Near 73F early in the month | ArtPrize from mid-month | The best month. Book rooms early |
| October | High sixties falling to fifties | ArtPrize to the 3rd, then colour | Second half is the best free walking of the year |
| November | High 47F, low 33F, about 7 inches of snow | Christmas display opens late in the month | The flattest month. Light goes early |
| December | Cold and snowy | Christmas display, skating, markets | Festive and genuinely dark |