May and Meteorological Spring 2025 Climate Summaries

Overview

May 2025 Summary Graphic

CoCoRaHS Observer Monthly Precipitation Summary

Meteorological Spring 2025 Summary Graphic

CoCoRaHS Observer Seasonal Precipitation Summary

CoCoRaHS Observer Seasonal Snowfall Summary

Public Information Statement
National Weather Service Chicago IL
1054 AM CDT Sun Jun 1 2025 /1154 AM EDT Sun Jun 1 2025/

...A Look Back at the Climate for the Month of May 2025 for
Chicago and Rockford...

At Chicago, the average high temperature was 67.7 degrees, which
is 2.8 degrees below normal. The average low temperature was
48.4 degrees, which is 2.2 degrees below normal. The mean average
temperature for the month was 58.0 degrees, which is 2.6 degrees
below normal. 1.35 inches of liquid precipitation were recorded,
which is 3.14 inches below normal.

The following daily records were set for Chicago this past May:
* Record daily high temperature of 94 degrees on the 15th.

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



At Rockford, the average high temperature was 71.4 degrees, which
is 0.2 degrees above normal. The average low temperature was
46.8 degrees, which is 2.7 degrees below normal. The average
temperature for the month was 59.1 degrees, which is 1.3 degrees
below normal. 2.17 inches of liquid precipitation were recorded,
which is 2.01 inches below normal.

The following daily records were set for Rockford this past May:
* Record daily high temperature of 94 degrees on the 15th.

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

..................................................................

Chicago's climatic period of record dates back to:
  1871 for precipitation
  1872 for temperatures
  1884 for snowfall
Rockford's climatic period of record dates back to:
  1905 for temperatures, precipitation, and snowfall

$$

Latest Monthly Climate Report:   Chicago    |    Rockford

Public Information Statement
National Weather Service Chicago IL
1239 PM CDT Sun Jun 1 2025 /139 PM EDT Sun Jun 1 2025/

...A Look Back at the Climate for Meteorological Spring (March,
April, May) 2025 for Chicago and Rockford...

At Chicago, the average high temperature was 60.7 degrees, which
is 1.9 degrees above normal. The average low temperature was
41.5 degrees, which is 0.9 degrees above normal. The mean average
temperature for the season was 51.1 degrees, which is 1.4 degrees
above normal. 7.00 inches of liquid precipitation were recorded,
which is 3.69 inches below normal. 2.8 inches of snow were
recorded, which is 4.0 inches below normal.

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

March:
** 10th warmest March on record with an average temperature of
   44.4 degrees.

April: None

May:
* Record daily high temperature of 94 degrees on the 15th.

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



At Rockford, the average high temperature was 62.6 degrees, which
is 3.5 degrees above normal. The average low temperature was
38.7 degrees, which is normal for the season. The average 
temperature for the season was 50.6 degrees, which is 1.7 degrees 
above normal. 7.15 inches of liquid precipitation were recorded, 
which is 3.18 inches below normal. 4.2 inches of snow were 
recorded, which is 1.6 inches below normal.

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

March:
* Record daily high temperature of 80 degrees on the 14th.
* Record daily high temperature of 80 degrees on the 28th.
** Tied 8th warmest March on record with an average temperature
   of 42.9 degrees.

April: None

May:
* Record daily high temperature of 94 degrees on the 15th.

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

..................................................................

Chicago's climatic period of record dates back to:
  1871 for precipitation
  1872 for temperatures
  1884 for snowfall
Rockford's climatic period of record dates back to:
  1905 for temperatures, precipitation, and snowfall

$$

Latest Seasonal Climate Report:   Chicago    |    Rockford

Events

• March 14-15, 2025: Line of late night storms produces damaging winds and multiple tornadoes

• March 19, 2025: Line of afternoon/evening storms produces damaging winds, hail, and multiple tornadoes

• March 30, 2025: Line of storms produces widespread wind damage and one tornado in northwest Indiana

• April 2, 2025: Two tornadoes occur in Iroquois County

• May 15, 2025: Scattered thunderstorms produce wind damage and hail up to 3 inches in diameter

• May 16, 2025: Significant dust storm impacts the region

NWS Chicago Science and Past Events Page