Milwaukee records about 869mm of rain across roughly 104 wet days a year, which is a 28% chance on an average day. June is the wettest month at 92mm (11% of the annual total) and February the driest at 35mm. Local rain type: snow mix. Milwaukee gets Lake Michigan-influenced weather — lake-effect snow in winter and summer thunderstorms. The Skywalk system connects downtown buildings.
Chance of rain on an average day: 28%
Rainfall climatology for Milwaukee. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 869mm |
| Rain days per year | 104 |
| Odds on an average day | 28% |
| Wettest month | June — 92mm over 13 days |
| Driest month | February — 35mm over 5 days |
| Rain type | snow mix |
| Best dry window | September offers warm, dry conditions before the long winter. |
| Worst rain window | November through March brings cold and snow. |
June delivers 163% more rain than February (92mm vs 35mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 11% of the annual total, so rain in Milwaukee is spread through the year — there is no season you can rely on being dry.
Milwaukee rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 13 days in June against 5 in February — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 38mm | 5 | 17% | -1°C |
| February | 35mm | 5 | 17% | -1°C |
| March | 52mm | 7 | 23% | 3°C |
| April | 72mm | 10 | 33% | 10°C |
| May | 72mm | 10 | 33% | 17°C |
| June | 92mm | 13 | 43% | 24°C |
| July | 84mm | 11 | 37% | 28°C |
| August | 78mm | 11 | 37% | 28°C |
| September | 78mm | 11 | 37% | 24°C |
| October | 62mm | 8 | 27% | 17°C |
| November | 56mm | 8 | 27% | 10°C |
| December | 42mm | 6 | 20% | 3°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Milwaukee we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Milwaukee records rain on roughly 104 days a year — about a 28% chance on any given day — totalling around 869mm.
June, with about 92mm over 13 rain days. That is 11% of the entire year's rainfall in a single month.
February is the driest month at 35mm across roughly 5 days. September offers warm, dry conditions before the long winter.
Milwaukee gets Lake Michigan-influenced weather — lake-effect snow in winter and summer thunderstorms. The Skywalk system connects downtown buildings.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.