The latter half of May was cool and damp. At O’Hare International Airport, rain was observed on 10 of the month’s last 14 days. Thursday marked the start of the meteorological summer season. Fittingly, the day averaged 2 degrees above normal, due largely to bright sunshine. The day produced 100% of its possible sunshine, the first time that has happened since May 7th. Temperatures reached 80 degrees most areas. More 80-degree weather is on its way. Computer forecasts are in close agreement in bringing a weather system across the upper Great lakes over the upcoming weekend. This feature will draw moist, tropical air into the region by Saturday, sending temperatures into the mid 80s. The higher humidity is expected to support thunderstorm development, especially Saturday night.
June’s opening weekend to turn warm and humid
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Tropical air to stay out of area much of week
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Cool open to meteorological autumn – but a warmup on the way
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Threat of thunderstorms rises with humidity
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Fall arrives in Chicago with 3rd day of record-breaking heat
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Scattered storms signal the return of cooler air
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Storms possible, then dry and a little warmer
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Rainy period may follow current warm spell
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Warming trend arrives ahead of the weekend
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Storms exit, allowing great weather for holiday
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Temperatures set another record as heat wave continues for fifth day
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Hot humid weather arrives—heat hits hard downstate
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Warm, humid air due to return over weekend
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On eve of fall, Chicago sees record breaking heat
