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OVERNIGHT: Clouds scatter with partial clearing toward morning. Cool for the season with low 40s chilliest inland locations. Winds: East 4-12 mph. Low: 44.
🥶 WGN Weather Producer Bill Snyder explains science behind our cooler temperatures
The long holiday weekend will open on a chilly note, with upper 30s and low 40s for much of Chicagoland. Even colder air will be prominent to our north where low 30s are likely from Minnesota into Michigan. Frost advisories are in effect for portions of Wisconsin, Minnesota and the U.P of Michigan.
Forecast for the Weekend
A center of high pressure will sit across northern Wisconsin north and deliver a generous amount of sunshine along with high in the 60s again inland, even close to 70 degrees for areas far south and southwest of Chicago. Lake breezes will mean another day of 50s for areas close to Lake Michigan.
Beach Forecast
Chicago beaches opened officially on Friday, but the current chilly temperature regime will certainly keep most from heading into the water until further notice despite the fact that the swim risk is low and wave heights are likely to be no worse than 1 foot.
Sunburn Times
Despite the cooler temperatures, the sun is strong this time of year and can result in a sunburn in about 20 minutes during peak time at 1pm without proper protection.
Holiday Weekend Snapshot
Forecast Highs Across the U.S.
Comfortable late May temperatures continue in the 60s and 70s across the northern 2/3 of the Lower 48. The real summer heat stays south across Texas, Florida, and portions of the Gulf Coast.
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Chicago Precipitation Chances
Tranquil and largely unvarying weather conditions throughout the holiday weekend with partly to mostly sunny skies. Next chance of rain doesn’t arrive until later Tuesday afternoon.
72-Hour Rainfall Forecast
While it will be quiet and rain-free here thanks to a ridge of high pressure, heavy rain is back across the central Plains from Oklahoma City to Tulsa to Little Rock, Arkansas and Memphis. 3-4” for most, but a few in Southwest Missouri may see up to 6”.
Chicago Forecast Highs and Departures from Normal
While temperatures will remain below normal, the deficits begin to shrink as we move later into next week.
Upper Level Weather Pattern
The ridge over Canada continues to act like an atmospheric block and allow cool troughs to dip southward into the Great Lakes and Northeast with cool shots.
Average Temperature Anomaly Forecast in 5-Day Intervals
May 23 through 27: The epicenter of the largest temperature shortfall, nearly 10-degrees below normal, is forecast from the Chicagoland area east into western Pennsylvania.
