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Storm Impacting the Northwest U.S.; Fire Weather Conditions in Southern California; Severe Weather in the South

A Pacific storm is bringing areas of low elevation rain, moderate to heavy mountain snow, and high winds to the Northwest. Strong Santa Ana winds and very dry conditions are producing elevated to critical fire weather conditions in southern California. Isolated strong to severe thunderstorms are possible through early Wednesday morning across parts of northeast Texas into western Tennessee. Read More >

 

Overview & Graphics

 

Recap of the temperatures and precipitation observed for August and Meteorological Summer 2024. 

 

Headline: August 2024 Review.  Sub Headline: Near to slightly above normal temperatures with below normal precipitation. Chicago (O'hare): Average Temperature: 74.8 degrees (1.0 degree above normal) Precipitation: 2.60 inches (1.65 inches below normal). Rockford: Average Temperature: 72.1 degrees (0.2 degrees above normal) Precipitation: 2.22 inches (1.97 inches below normal). Graphic Created: Monday, September 2, 2024 8:28 AM CDT  
August 2024 saw near to slightly above normal temperatures at both Chicago and Rockford. Precipitation, on the other hand, was below normal for the month at both locations.  

 

Headline: Summer 2024 Review.  Sub Headline: Slightly above normal temperatures but generally near to below normal precipitation. Chicago (O'hare): Average Temperature: 74.6 degrees (1.3 degrees above normal) Precipitation: 11.59 inches (0.47 inches below normal). Rockford: Average Temperature: 72.9 degrees (1.0 degree above normal) Precipitation: 14.14 inches (1.25 inches above normal).   Graphic Created: Monday, September 2, 2024 8:28 AM CDT  
Summer of 2024 (June, July, and August) saw slightly above normal temperatures at both Chicago and Rockford. While precipitation was generally near to below normal for the season, portions of northern IL and Rockford did receive above normal precipitation.  
Chicago and Rockford Seasonal Summary
 
...A Look Back at the Climate for Meteorological Summer (June,
July, August) 2024 for Chicago and Rockford...

At Chicago, the average high temperature was 83.7 degrees, which
is 1.2 degrees above normal. The average low temperature was
65.5 degrees, which is 1.4 degrees above normal. The average
temperature for the month was 74.6 degrees, which is 1.3 degrees
above normal. 11.59 inches of liquid precipitation were recorded,
which is 0.47 inches below normal.

Daily and top ten monthly records established for Chicago this
past summer...

June:
* Record Daily High Temperature of 97 degrees on 17th.
* Record Daily High Minimum Temperature of 78 degrees on 18th.

** Tied Record 10th Warmest June at 73.9 degrees.

July:
* Record Daily Rainfall of 1.60 inches on 13th.

August:
* Tied Record Daily High Minimum Temperature of 74 degrees on
  25th.
* Record Daily High Minimum Temperature of 79 degrees on 26th.
* Record Daily High Temperature of 99 degrees on 27th.

No top ten seasonal records were set for Chicago during this past
summer.


At Rockford, the average high temperature was 83.4 degrees, which
is 1.2 degrees above normal. The average low temperature was
62.5 degrees, which is 0.8 degrees above normal. The average
temperature for the month was 72.9 degrees, which is 1.0 degrees
above normal. 14.48 inches of liquid precipitation were recorded,
which is 1.25 inches above normal.

Daily and top ten monthly records established for Rockford this
past summer...

June:
* Tied Record Daily High Minimum Temperature of 74 degrees on
  18th.

** Tied Record 8th Warmest June at 73.7 degrees.

July:
* Record Daily Rainfall of 2.32 inches on 13th.

** Record 8th Wettest July with 7.79 inches.

August:
* Record Daily High Temperature of 98 degrees on 27th.

No top ten seasonal records were set for Rockford during this
past summer.


Latest Seasonal Climate Report:   Chicago    |    Rockford
 

Chicago and Rockford Monthly Summary
 
...A Look Back at the Climate for the Month of August 2024 for
Chicago and Rockford...

At Chicago, the average high temperature was 83.8 degrees, which
is 1.3 degrees above normal. The average low temperature was
65.9 degrees, which is 0.8 degrees above normal. The average
temperature for the month was 74.8 degrees, which is 1.0 degrees
above normal. 2.60 inches of liquid precipitation were recorded,
which is 1.65 inches below normal.

The following daily records were set for Chicago this past
August:
* Tied High Minimum Temperature of 74 degrees on 25th.
* Record High Minimum Temperature of 79 degrees on 26th.
* Record High Temperature of 99 degrees on 27th.

No top ten monthly records were set for Chicago during this past
August.


At Rockford, the average high temperature was 82.9 degrees, which
is 0.9 degrees above normal. The average low temperature was
61.2 degrees, which is 0.6 degrees below normal. The average
temperature for the month was 72.1 degrees, which is 0.2 degrees
above normal. 2.22 inches of liquid precipitation were recorded,
which is 1.97 inches below normal.

The following daily records were set for Rockford this past
August:
* Record High Temperature of 98 degrees on 27th.

No top ten monthly records were set for Rockford during this past
August.

Latest Monthly Climate Report:   Chicago    |    Rockford

Events

  • July 15, 2024: Derecho produces widespread wind damage and a record number of tornadoes in the local area
  • July 14, 2024: Nighttime line of storms produces swaths of wind damage and several embedded tornadoes
  • July 13-14, 2024: Significant flash flooding in Rockford and isolated wind damage from morning storms
  • June 22, 2024: Heavy rainfall, swaths of wind damage, and four EF-0 tornadoes in the Chicago suburbs
  • June 16, 2024: Thunderstorms and a gust front produce scattered wind damage in northern Illinois
  • June 13, 2024: Widespread wind damage in Ford County and an EF-1 tornado near Gibson City

 

NWS Chicago Science and Past Events Page