890
CXUS53 KIWX 011938
CLMSBN

CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
338 PM EDT THU OCT 01 2026

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

...THE SOUTH BEND CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1893 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             99   09/01/1953
                       09/08/1933
                       09/07/1933
 LOW              29   09/28/1942
HIGHEST           93   09/02         MM      MM       88  09/19
LOWEST            42   09/26         MM      MM       40  09/08
AVG. MAXIMUM    77.6               74.4     3.2     78.3
AVG. MINIMUM    58.4               53.0     5.4     54.7
MEAN            68.0               63.7     4.3
DAYS MAX >= 90     4                1.5     2.5        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.0     0.0        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       13.92   2008
 MINIMUM        0.01   1979
TOTALS          4.36               3.49    0.87     1.34
DAILY AVG.      0.15               0.12    0.03     0.04
DAYS >= .01        8                9.6    -1.6        6
DAYS >= .10        7                5.9     1.1        4
DAYS >= .50        4                2.2     1.8        1
DAYS >= 1.00       1                0.8     0.2        0
GREATEST
 24 HR. TOTAL   1.71   09/20 TO 09/20

SNOWFALL (INCHES)
RECORDS
 TOTAL           1.2   1942
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        0.0                0.0     0.0      0.0
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0
 24 HR TOTAL     0.0

DEGREE DAYS
HEATING TOTAL     60                116     -56       46
 SINCE 7/1        64                137     -73       71
COOLING TOTAL    156                 77      79      100
 SINCE 1/1       902                714     188      950
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.2
HIGHEST WIND SPEED/DIRECTION    25/320    DATE  09/03
HIGHEST GUST SPEED/DIRECTION    36/330    DATE  09/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.35
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     76

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              7     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       6
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      15     FOG W/VIS <= 1/4 MILE      2
HAZE                      2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

WARM AND STORMY SEPTEMBER.

THE MONTH BEGAN WITH A TRIO OF 90S AND A HANDFUL OF SEVERE
THUNDERSTORM DAYS, WITH WARNINGS ISSUED ON THE 3RD, 4TH, AND 5TH. WE
NOTCHED ONE ADDITIONAL 90-DEGREE DAY ON THE 15TH, BRINGING THE
MONTH`S TOTAL TO 4, WHICH IS THE MOST SINCE 2017 (4). THE DAILY
AVERAGE TEMPERATURE FINALLY DIPPED BELOW NORMAL ON THE 13TH AND
14TH, FOLLOWED BY ANOTHER MILD STRETCH AS A LARGE UPPER-LEVEL RIDGE
MOVED IN ONCE MORE. A TASTE OF FALL ARRIVED IN THE LATTER THIRD OF
THE MONTH WHEN HIGHS IN THE 60S AND EVEN SOME LOWS IN THE 40S WERE
COMMON. THE AVERAGE TEMPERATURE FOR THE MONTH WAS 68.0 WHICH IS 4.3
DEGREES ABOVE NORMAL AND RANKS AS THE 18TH WARMEST ON RECORD. ONE
TEMPERATURE RECORD WAS SET: ON SEPTEMBER 3, THE LOW TEMPERATURE OF
ONLY 75 BROKE THE PREVIOUS WARM-MINIMUM TEMPERATURE OF 73 SET IN
1913.

DUE TO THE AFORMENTIONED UPPER-LEVEL RIDGE, WE FOUND OURSELVES
WITHIN THE "RING OF FIRE" PATTERN AT TIMES. IN THIS PATTERN,
COMPLEXES OF THUNDERSTORMS RIDE ATOP A RIDGE IN PLACE. RAINFALL FOR
THE MONTH TOTALED 4.36 INCHES WHICH IS 0.87" ABOVE NORMAL AND RANKS
AS THE 33RD WETTEST ON RECORD. ONE DAILY RAINFALL RECORD WAS SET:
SEPTEMBER 20TH RECORDED 1.71 INCHES, BREAKING THE PREVIOUS RECORD OF
0.99 SET IN 1983. THE STRETCH FROM SEPTEMBER 15TH THROUGH 20TH
REPRESENTED 89% OF THE MONTH`S TOTAL: 3.89 INCHES. DURING THIS
STRETCH, INSTANCES OF URBAN AND LOW-LYING FLOODING WERE NOTED ALONG
WITH RISING LEVELS ON AREA WATERWAYS.

BROWN

$$