Monday: Temperatures slowly begin rising after coolest weather spell in two months

NOTE: This article is now an almanac of Monday’s weather. We have published a new forecast story for Tuesday.

Monday temperatures creeped a bit higher, reaching the lower 80s at both major airports following a cooler but comfortable weekend. In fact, Monday made it six consecutive days with sub-normal temperatures, the coolest spell of weather here since early June, two months ago!

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August 2025 has gotten off to a sunny start, the first four days have averaged 89% of possible sunshine, well above the 64% that is typical for the month.  

Monday late afternoon temperature/dew point snapshot

Comfortable temperatures and continued relatively low humidity by early August standards. It has certainly been much warmer and more humid at this time of year. 

Chicago’s 80-degree tally

Following a 4-day hiatus, we began a new 80-degree streak on Monday afternoon. To date, Midway has logged 4 more days of 80+ than O’Hare International Airport.   

Monday Allergy Count

For the first time this year, Ragweed pollen was measured by the folks at Loyola Medicine. For folks that have a strong sensitivity to ragweed pollen you may have the following symptoms.

• Nasal congestion and runny nose: Stuffy or runny nose, often with thick, clear mucus.
• Sneezing: Frequent, uncontrollable sneezing.
• Itchy eyes: Watery, red, or itchy eyes.
• Sore throat: Irritation and scratchiness in the throat.
• Coughing: Persistent coughing, especially when exposed to ragweed pollen.
• Wheezing: In some cases, wheezing may occur due to airway inflammation.
• Headaches: Headaches, particularly due to sinus congestion