May 2015

...A LOOK BACK AT THE CLIMATE FOR THE MONTH OF MAY 2015 FOR CHICAGO
AND ROCKFORD...

AT CHICAGO...THE AVERAGE HIGH TEMPERATURE WAS 70 DEGREES WHICH IS
NORMAL. THE AVERAGE LOW TEMPERATURE WAS 50.7 DEGREES WHICH IS 2.4
DEGREES ABOVE NORMAL. THE AVERAGE TEMPERATURE FOR THE MONTH WAS 60.4
DEGREES WHICH IS 1.3 DEGREES ABOVE NORMAL. DURING THE MONTH OF
MAY...4.66 INCHES OF PRECIPITATION WAS RECORDED WHICH IS 0.98 INCHES
ABOVE NORMAL.

THERE WERE NO RECORDS SET FOR CHICAGO FOR THE MONTH OF MAY 2015...

AT ROCKFORD...THE AVERAGE HIGH TEMPERATURE WAS 71.5 DEGREES WHICH
IS 0.3 DEGREE BELOW NORMAL. THE AVERAGE LOW TEMPERATURE WAS 51.5
DEGREES WHICH IS 3.1 DEGREES ABOVE NORMAL. THE AVERAGE TEMPERATURE
FOR THE MONTH WAS 61.5 DEGREES WHICH IS 1.4 DEGREES ABOVE NORMAL.
DURING THE MONTH OF MAY...4.85 INCHES OF PRECIPITATION WAS
RECORDED WHICH IS 0.83 INCHES ABOVE NORMAL. A TRACE OF SNOW WAS
RECORDED DURING THE MONTH...WHICH IS NORMAL SNOWFALL FOR MAY.

RECORDS FOR ROCKFORD FOR THE MONTH OF MAY 2015...

DAILY RECORDS...
MAY 20...SET RECORD FOR LOW MAXIMUM TEMPERATURE OF 47...
                                 ...OLD RECORD 51 IN 2002.
MAY 20...SET RECORD FOR SNOWFALL WITH A TRACE...
                                ...FIRST TIME ON THIS DATE.

May Climate Summaries:    Chicago   |    Rockford

Spring 2015

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1141 AM CST MON JUNE 1 2015

...A LOOK BACK AT THE CLIMATE FOR METEOROLOGICAL SPRING
(MARCH...APRIL...MAY) 2015 FOR CHICAGO AND ROCKFORD...

AT CHICAGO...THE AVERAGE HIGH TEMPERATURE FOR THE SPRING SEASON WAS
58.1 DEGREES WHICH IS 0.4 DEGREE BELOW THE 1981 TO 2010 AVERAGE.
THE AVERAGE LOW TEMPERATURE WAS 38.6 DEGREES WHICH IS 0.2 DEGREE
BELOW NORMAL. THE MEAN TEMPERATURE FOR THE SEASON WAS 48.4 DEGREES
WHICH IS 0.2 DEGREE BELOW NORMAL.

A TOTAL OF 8.63 INCHES OF PRECIPITATION WAS RECORDED DURING THIS
PAST SPRING...WHICH IS 0.93 INCHES BELOW NORMAL. THERE WAS A
TOTAL OF 7.1 INCHES OF SNOW RECORDED AT OHARE WHICH IS 0.3 OF AN INCH
ABOVE NORMAL.

RECORDS ESTABLISHED OR TIED DURING THE SRING MONTHS:
MARCH...

DAILY RECORD...
MAR 6...SET RECORD FOR LOW TEMPERATURE WITH 0...
                  ...OLD RECORD 2 ABOVE IN 1960.

APRIL...

DAILY RECORDS...
APR 14...TIED RECORD FOR LOWEST RELATIVE HUMIDITY 0F 13%...
                              ...OLD RECORD APRIL 8 1971...
                                           APRIL 11 1956...
                                               MAY 10 1934.
APR 24...TIED RECORD FOR LOW TEMPERATURE WITH 29 ABOVE...
                                   ...OLD RECORD IN 1910.

MAY...NONE.

AT ROCKFORD...THE AVERAGE HIGH TEMPERATURE WAS 60.2 DEGREES WHICH IS
0.4 DEGREE ABOVE NORMAL. THE AVERAGE LOW TEMPERATURE WAS 37.8
DEGREES WHICH IS 0.2 DEGREES BELOW NORMAL. THE MEAN TEMPERATURE FOR
THE SEASON WAS 49 DEGREES WHICH IS 0.1 DEGREE ABOVE NORMAL.

A TOTAL OF 9.27 INCHES OF PRECIPITATION WAS RECORDED DURING THIS
PAST SPRING...WHICH WAS 0.42 OF AN INCH BELOW NORMAL. IN
ADDITION...A TOTAL OF 7.6 INCHES OF SNOW WAS RECORDED WHICH IS 1.9
INCHES ABOVE NORMAL.

RECORDS ESTABLISHED OR TIED DURING THE SPRING MONTHS:
MARCH...

DAILY RECORDS
MAR 5...SET RECORD FOR COLDEST HIGH TEMPERATURE WITH 13 ABOVE...
                                 ...OLD RECORD 17 ABOVE IN 1960.
MAR 23...SET RECORD FOR DAILY MAXIMUM SNOWFALL OF 5.1 INCHES...
                              ...OLD RECORD 1.9 INCHES IN 1965.

APRIL...

DAILY RECORDS
APR 9...SET RECORD FOR DAILY MAXIMUM RAINFALL OF 2.24 INCHES...
                              ...OLD RECORD 1.1 INCHES IN 1943.

MAY...

DAILY RECORDS...
MAY 19...SET RECORD FOR COLDEST HIGH TEMPERATURE WITH 47 ABOVE...
                                 ...OLD RECORD 51 ABOVE IN 2002.

Meteorological Spring Summaries:    Chicago   |    Rockford

For more, see our Local Climate Page.