Climatological Report (Seasonal)
Issued by NWS
Issued by NWS
411
CXUS53 KIWX 011017
CLSSBN
CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
617 AM EDT MON SEP 01 2025
...................................
...THE SOUTH BEND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2025 TO 8/31/2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1893 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 109 07/24/1934
LOW 35 06/11/1972
06/02/1956
06/16/1917
HIGHEST 96 07/24 81 15 97
LOWEST 38 06/01 61 -23 43
06/02
AVG. MAXIMUM 83.4 81.0 2.4 83.3
AVG. MINIMUM 62.8 60.2 2.6 62.0
MEAN 73.1 70.6 2.5
DAYS MAX >= 90 22 11.3 10.7 16
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 19.30 2016
MINIMUM 5.62 1991
TOTALS 11.67 11.83 -0.16 11.75
DAILY AVG. 0.13 0.13 0.00 0.13
DAYS >= .01 31 30.5 0.5 30
DAYS >= .10 21 20.4 0.6 19
DAYS >= .50 9 8.1 0.9 9
DAYS >= 1.00 4 2.6 1.4 5
GREATEST
24 HR. TOTAL 1.51
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
24 HR TOTAL MM
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 >= TRACE 0 0.0 0.0 0
DAYS >= 1.0 0 0.0 0.0 0
GREATEST
SNOW DEPTH 0 0
24 HR TOTAL 0.0
DEGREE DAYS
HEATING TOTAL 44 64 -20 25
SINCE 7/1 25 14 11 8
COOLING TOTAL 815 581 234 753
SINCE 1/1 850 637 213 814
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 7.0
HIGHEST WIND SPEED/DIRECTION 39/270 DATE 07/16
HIGHEST GUST SPEED/DIRECTION 57/270 DATE 07/16
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.28
NUMBER OF DAYS FAIR 61
NUMBER OF DAYS PC 24
NUMBER OF DAYS CLOUDY 7
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 21 MIXED PRECIP 0
HEAVY RAIN 16 RAIN 17
LIGHT RAIN 36 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 53 FOG W/VIS <= 1/4 MILE 3
HAZE 22
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
...A WARM SUMMER WITH NEAR NORMAL RAINFALL...
SUMMER 2025 BEGAN WITH AN EARLY SEASON HEATWAVE IN MID TO LATE JUNE
WITH SEVERAL DAYS IN THE LOW TO MID 90S. JULY 2025 COULDN`T HAVE
BEEN MORE DIFFERENT THAN LAST YEAR...UNLIKE WHEN THERE THERE 0 DAYS
ABOVE 90 DEGREES IN JULY 2024, HOT AND VERY HUMID CONDITIONS
PERSISTED THROUGH JULY. THIS YEAR, JULY WAS THE 2ND MOST HUMID JULY
SINCE DEWPOINT RECORDS BEGAN IN 1929. THE AVERAGE DEWPOINT WAS 66.41
DEGREES, MAKING IT THE MOST HUMID JULY SINCE 1955 WHEN THE AVERAGE
DEWPOINT WAS 67.44 DEGREES. THE PEAK OF THE SUMMER HEAT OCCURRED IN
MID TO LATE JULY; THE HOTTEST DAY OF THE SUMMER WAS ON JULY 24TH
WITH A HIGH OF 96 DEGREES. AUGUST BROUGHT SOME MUCH NEEDED RELIEF
FROM THE HEAT AND HUMDITY, ESPECIALLY TOWARDS THE END OF THE MONTH.
THERE WERE 22 90+ DEGREE DAYS THIS SUMMER, WITH 9 IN JUNE, 8 IN
JULY, AND 5 IN AUGUST. OVERALL, SUMMER 2025 HAD AN AVERAGE
TEMPERATURE OF 73.1 DEGREES, WHICH IS 1.5 DEGREES ABOVE NORMAL AND
TIES FOR THE 23RD WARMEST SUMMER ON RECORD. THIS WAS THE WARMEST
SUMMER SINCE 2021.
ANY APPRECIABLE RAINFALL THIS SUMMER WAS FOUND MAINLY IN DAILY POP-
UP SHOWERS AND STORMS, AND MANY OF THESE OPPOURTUNITIES WERE HIT OF
MISS FOR THE SOUTH BEND AIRPORT. THERE WERE MANY DAYS WERE NO RAIN
WAS MEASURED AT THE AIRPORT, ALBEIT THERE WERE ALSO 4 DAYS WITH A
RAINFALL TOTAL OF 1" OR MORE (2 DAYS IN JUNE AND 2 DAYS IN AUGUST).
THE HIGHEST 1 DAY TOTAL WAS ON AUGUST 18TH WHEN 1.51" FELL! OVERALL,
11.67" OF RAIN FELL THIS SUMMER IN SOUTH BEND, WHICH RANKS AS THE
51ST WETTEST ON RECORD. SOUTH BEND WAS VERY CLOSE TO NEAR NORMAL
RAINFALL WITH A DEFICIT OF ONLY 0.16".
A MONTH BY MONTH SUMMARY IS BELOW:
...JUNE BRINGS THE FIRST SUMMER HEAT WAVE...
WHILE JUNE 1 WAS NOTABLY COOL (DAILY AVERAGE TEMPERATURE WAS 11
DEGREES BELOW NORMAL), THE REMINDER OF THE MONTH WAS WARMER THAN
NORMAL. ONLY SIX DAYS THIS MONTH SAW AN AVERAGE DAILY TEMPERATURE
BELOW NORMAL. DURING A LATE-MONTH HEAT WAVE, SOUTH BEND SET THREE
RECORD WARM MINIMUM TEMPERATURES (JUNE 22, 23, 24) AND RECORDED A
HIGH TEMPERATURE OF 90 OR GREATER FOR SEVEN STRAIGHT DAYS.
THE LONGEST STRETCH OF 90S ON RECORD IS 15 DAYS BACK IN 1901. JUNE
OF LAST YEAR SAW AN SEVEN-DAY STRETCH END ON JUNE 22ND. EARLY JULY
2020 RECORDED EIGHT STRAIGHT 90-DEGREE DAYS. THE TOTAL NUMBER OF 90
DEGREE DAYS THIS MONTH IS NINE, MATCHING THAT OF JUNE 2024 AND IS
ABOVE THE AVERAGE OF FOUR.
THE AVERAGE TEMPERATURE FOR THE MONTH WAS 72.7 DEGREES WHICH IS 3.9
DEGREES ABOVE NORMAL. THIS RANKS AS THE 10TH WARMEST JUNE OF RECORD.
THIS WAS THE WARMEST JUNE SINCE 2021 (73.0 DEGREE AVERAGE) AND WAS
ONLY SLIGHTLY WARMER THAN JUNE 2024 (72.4 DEGREE AVERAGE).
WHILE 90-DEGREE DAYS CERTAINLY NUDGED THE MONTH`S AVERAGE
TEMPERATURE ABOVE NORMAL, OVERNIGHT LOWS CARRIED NOTABLE WEIGHT. THE
MONTH`S AVERAGE LOW TEMPERATURE OF 62.3 DEGREES TIES AS THE 8TH
WARMEST ON RECORD.
AMID THE HOT AND STEAMY CONDITIONS, PASSING THUNDERSTORMS BUBBLED UP
AT TIMES AND RAINFALL RATES WERE VERY EFFICIENT. FOR EXAMPLE, 1.01"
OF RAIN WAS RECORDED ON THE 27TH BUT 0.98" OF THIS TOTAL WAS
RECORDED IN ONE HOUR DURING THE EARLY MORNING HOURS. ON THE EVENING
ON JUNE 17, SLOW-MOVING THUNDERSTORMS BECAME ANCHORED OVER NEARBY
GRANGER, IN, RESULTING IN A COCORAHS REPORT OF 4.92 INCHES IN A
MANNER OF ABOUT 3 TO 4 HOURS. THE SOUTH BEND AIRPORT RECORDED 0.00"
THIS DAY.
ALL TOLD, THE MONTH`S PRECIPITATION TOTALED 5.01 INCHES WHICH IS
0.97 INCHES ABOVE NORMAL. THIS RANKS AS THE 30TH WETTEST JUNE ON
RECORD. THIS IS THE MOST JUNE RAINFALL SINCE 9.67 INCHES IN 2021.
...A HOT AND HUMID JULY...
LAST YEAR, WE ENJOYED A COOLER THAN NORMAL JULY WITH NO 90 DEGREE
DAYS. THIS YEAR, THE WEATHER WAS MUCH MORE TYPICAL FOR JULY WITH
MULTIPLE UPPER LEVEL RIDGES SETTING UP OVER THE MIDWEST AND GREAT
LAKES REGIONS. HOT AND HUMID WEATHER DOMINATED FOR A MAJORITY OF THE
MONTH, ESPECIALLY AT THE BEGINNING AND END OF THE MONTH. THERE WERE
EIGHT DAYS WITH HIGH TEMPERATURES IN THE 90S IN SOUTH BEND. THE
HOTTEST TEMPERATURE THIS MONTH WAS 96 DEGREES ON JULY 24TH. AS FOR
THE HUMIDITY, THERE WAS A NOTICEABLE STRETCH OF VERY HUMID
CONDITIONS FROM JULY 24TH THROUGH 30TH. DURING THIS TIME THERE WERE
64 CONSECUTIVE HOURS OF DEWPOINTS AT OR GREATER THAN 70 DEGREES.
THIS RUN IS THE 11TH LONGEST WITH DEWPOINTS AT OR ABOVE 70 DEGREES
FOR JULY. DEWPOINT DATA AT KSBN DATES BACK TO 1948. ONE RECORD WARM
LOW TEMPERATURE WAS TIED THIS MONTH. ON JULY 24TH, THE LOW OF 74
DEGREES TIED THE PREVIOUS DAILY RECORD SET IN 1987. OVERALL, JULY
FINISHED WITH AN AVERAGE TEMPERATURE OF 75.9 DEGREES, WHICH IS 3.5
DEGREES ABOVE NORMAL. THIS MONTH TIES 1949 AS THE 19TH WARMEST JULY
ON RECORD AND THE WARMEST SINCE 76.4 DEGREES IN 2020.
AMID VERY HOT AND HUMID CONDITIONS, THUNDERSTORMS WERE WIDELY HIT OR
MISS IN AND AROUND SOUTH BEND THIS MONTH. RAINFALL WAS VERY
EFFICIENT FOR LOCATIONS THAT WERE ABLE TO GET STORMS. FOR INSTANCE,
ON JULY 20TH, A NEARBY COCORAHS OBSERVER IN MILL CREEK, IN IN LA
PORTE COUNTY REPORTED 2.94" OF RAINFALL WHILE THE SOUTH BEND AIRPORT
ONLY GOT A TRACE. THERE WERE ONLY TWO DAYS THIS MONTH WHERE DAILY
RAINFALL TOTALS WERE OVER A HALF INCH: JULY 26TH AND JULY 28TH. JULY
2025 HAD 3.04 INCHES OF RAIN THIS MONTH, WHICH IS 0.74 INCHES BELOW
NORMAL AND RANKS AS THE 65TH DRIEST MONTH ON RECORD. THIS WAS THE
DRIEST JULY IN SOUTH BEND SINCE 2.39 INCHES IN 2021.
...AN AVERAGE AUGUST...
THE BEGINNING OF AUGUST BEGAN WITH A FEW DAYS OF COOLER THAN NORMAL
TEMPERATURES, WHICH WAS FOLLOWED BY A LONGER RELATIVELY WARM PERIOD
THROUGH THE MIDDLE PART OF THE MONTH. THERE WERE 5 DAYS IN THE 90S
THIS MONTH WITH THE WARMEST TEMPERATURE OF THE MONTH OCCURRING ON
AUGUST 16TH WITH A HIGH OF 94 DEGREES. A UNSEASONABLY STRONG COLD
FRONT SWEPT THROUGH ON AUGUST 24TH/25TH, REPLACING THE HOT AND HUMID
CONDITIONS WITH MUCH COOLER TEMPERATURES FOR THE LAST THIRD OF THE
MONTH. THE LAST 9 DAYS OF AUGUST FEATURED HIGHS IN THE 70S AND LOWS
IN THE 40S. DAILY AVERAGE TEMPERATURE DEPARTURES WERE GENERALLY
SMALL EACH DAY, BUT DEPARTURES ON THE 12TH AND 16TH WERE OVER 10
DEGREES ABOVE NORMAL AND THE DEPARTURE ON THE 29TH WAS OVER 10
DEGREES BELOW NORMAL. AFTER THE 2ND MOST HUMID JULY ON RECORD,
AUGUST WAS MUCH MORE COMFORTABLE IN TERMS OF HUMIDITY AND THE
OVERNIGHT LOWS. THERE WERE 4 NIGHTS IN AUGUST WITH A LOW OF 50 OR
LESS; THE COLDEST LOW TEMPERATURE OF THE MONTH OF 45 DEGREES
OCCURRED ON AUGUST 29TH. ALL IN ALL, AUGUST FINISHED WITH AN AVERAGE
TEMPERATURE OF 70.7 DEGREES IN SOUTH BEND, WHICH IS EXACTLY AT
AVERAGE.
MUCH LIKE JULY, PRECIPITATION WAS VERY HIT OR MISS. MUCH OF THE
MONTH`S RAINFALL TOTAL CAME FROM POP-UP SHOWERS AND STORMS AS THE
AFOREMENTIONED STRONG COLD FRONT TOWARDS THE END OF THE MONTH DID
NOT PRODUCE ANY SUSBSTAINIAL RAIN. THE BULK OF THE MONTH`S TOTAL
RAINFALL FELL IN 48 HOURS BETWEEN AUGUST 18TH AND 19TH. 1.51" FELL
ON AUGUST 18TH AND 1.31" FELL ON AUGUST 19TH; THE LATTER SET A NEW
DAILY RAINFALL RECORD, BREAKING THE PREVIOUS DAILY RECORD OF 1.18"
SET ON AUGUST 19, 1900. AUGUST TOTALED 3.62" OF RAIN DURING THE
MONTH, WHICH IS ONLY 0.16" BELOW NORMAL. THIS WAS THE 57TH WETTEST
AUGUST ON RECORD. RECORDS BEGAN IN 1893.
BROWN/JOHNSON/ROLLER
$$