Over the last 365 complete days, the highest daily maximum at Chicago Midway was 36°C on Sep 2 2026 and the lowest was -15°C on Jan 23 2026. The observed high is the highest temperature in the airport's own METAR reports during the local calendar day. Updated twice a day.
The first check appears after the first archived day ends.
Scorecard appears after 7 checked days (0/7 so far).
| Month | Average high | Warmest day | Coolest day | Days |
|---|---|---|---|---|
| Oct 2026 | 21.4° | 31° | 13° | 29 |
| Sep 2026 | 24.9° | 36° | 17° | 30 |
| Aug 2026 | 27.3° | 32° | 24° | 31 |
| Jul 2026 | 29.2° | 35° | 23° | 31 |
| Jun 2026 | 26.0° | 34° | 19° | 30 |
| May 2026 | 20.9° | 30° | 8° | 31 |
| Apr 2026 | 17.8° | 28° | 3° | 30 |
| Mar 2026 | 12.6° | 27° | -4° | 31 |
| Feb 2026 | 5.2° | 18° | -4° | 28 |
| Jan 2026 | -1.3° | 16° | -15° | 31 |
| Dec 2025 | 1.6° | 14° | -12° | 31 |
| Nov 2025 | 9.7° | 21° | 0° | 30 |
| Oct 2025 | 13.0° | 13° | 13° | 2 |