Milwaukee Weather Today: Hour-by-Hour Forecast, Storm Risk, and Safety Tips

Milwaukee residents are set to enjoy a stretch of comfortably mild conditions as late-summer warmth hangs on through the weekend. According to the latest outlook, Saturday, September 13, will top out near 70 °F, with light winds and plenty of afternoon sun—perfect weather for tailgating at American Family Field or catching the Lakefront Festival of Art. Overnight temperatures will slip to the lower 60s along the shoreline and mid-50s inland, so pack a light jacket if your plans run late. Sunday brings a subtle uptick in humidity as southerly breezes off Lake Michigan push highs into the low-70s before scattered late-day showers develop west of I-94. Any rain looks brief, but motorists should anticipate slick pavement during the evening drive back from the Brewers–Cubs series finale. Early next week, a blocking ridge over the Midwest will nudge the mercury higher, delivering highs around 76 °F Monday and Tuesday with dew points flirting with 60 °F. The National Weather Service hints at a stronger cold front arriving Wednesday night that could trigger a line of thunderstorms and usher in the first real taste of fall by Thursday—daytime highs may struggle to reach 68 °F, with brisk northwest winds gusting 20–25 mph. September is historically a transitional month for Milwaukee: average highs run 72 °F and lows 58 °F, and lake-enhanced breezes can make it feel cooler downtown compared with inland suburbs. Gardeners should keep an eye on next weekend’s forecast, as overnight lows could dip to the upper-40s in Washington and Ozaukee Counties—close to the point where tender annuals take damage. Travel tips • Flying out of Mitchell International? Morning fog is possible Monday before 9 a.m.; arrive early for potential visibility delays. • Planning a Lake Michigan charter? Best wave conditions look to be Sunday morning and Tuesday afternoon, with 1–2 ft swells. • Leaf-peepers can expect peak color to reach southeastern Wisconsin in early October, about a week later than last year due to the warm stretch. Safety reminders • UV Index remains moderate; apply sunscreen if you’ll be outside more than 30 minutes. • Hydrate at weekend festivals: even mid-70s temperatures can lead to heat exhaustion when combined with alcohol. • Secure patio furniture ahead of Wednesday night’s frontal passage to avoid wind damage. Bottom line: Milwaukee weather stays mostly pleasant through mid-week, then turns cooler and breezier as autumn tightens its grip. Keep tabs on the 7-day forecast, and plan those outdoor outings now while the lakeshore sunshine still feels like summer.