July 19-20, 2019: Heat Episode, Including Rockford Tying All-Time Record High Minimum Temperature

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Northern Illinois and northwest Indiana were at the northern end of a dome of heat, with highs on July 19-20 reaching into the mid 90s in most communities.
High moisture also moved into the area with dew points reaching 75° to 80°, which combined with the temperatures brought heat index values well over 100° during the two afternoons.
The humid air kept temperatures from dropping much at all at night, especially in the urban areas.
Rockford tied an all-time record for a daily minimum temperature, with a low only of 80° on July 19.

Maximum Heat Indices and Temperatures During the Hot Stretch

Rockford Record

All-Time Record High Minimum Temperature Tied at Rockford, IL

Observation History at Rockford, IL

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