Climatological Report (Seasonal)
Issued by NWS

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CXUS53 KIWX 010908
CLSSBN

CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
508 AM EDT WED SEP 01 2021

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

...THE SOUTH BEND CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2021 TO 8/31/2021...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1893 TO 2021

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           95   08/24         81      14       94
LOWEST            46   06/22         61     -15       44
AVG. MAXIMUM    83.7               81.0     2.7     85.0
AVG. MINIMUM    64.3               60.2     4.1     62.6
MEAN            74.0               70.6     3.4
DAYS MAX >= 90    11               11.3    -0.3       21
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         17.56              11.83    5.73    10.33
DAILY AVG.      0.19               0.13    0.06     0.11
DAYS >= .01       33               30.5     2.5       25
DAYS >= .10       19               20.4    -1.4       15
DAYS >= .50       12                8.1     3.9        9
DAYS >= 1.00       4                2.6     1.4        3
GREATEST
 24 HR. TOTAL   4.63

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       MM
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      MM

DEGREE DAYS
HEATING TOTAL     10                 64     -54       14
 SINCE 7/1         0                 14     -14        1
COOLING TOTAL    858                581     277      852
 SINCE 1/1       952                637     315      913
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.8
HIGHEST WIND SPEED/DIRECTION    41/300    DATE  06/29
HIGHEST GUST SPEED/DIRECTION    55/280    DATE  06/29

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.29
NUMBER OF DAYS FAIR           62
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             28     MIXED PRECIP               0
HEAVY RAIN               18     RAIN                      16
LIGHT RAIN               40     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      41     FOG W/VIS <= 1/4 MILE      6
HAZE                     13

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

&&

FOR THE SUMMER SEASON, SOUTH BEND AVERAGED 74.0 TEMPERATURE-WISE,
WHICH WAS 3.4 ABOVE ITS NORMAL SUMMER-TIME AVERAGE TEMPERATURE OF
70.6. THIS RANKS AS THE 9TH WARMEST SUMMER WHEN COMPARED TO THE
PERIOD OF RECORD. IT ALSO TOTALLED 17.56 INCHES OF RAINFALL, WHICH
IS 5.73 INCHES ABOVE NORMAL. THIS RANKS AS THE 2ND WETTEST SPRING WHEN
COMPARED TO THE PERIOD OF RECORD.

SEE THE MONTH BY MONTH SUMMARY BELOW.

JUNE 2021

ON JUNE 1, THE TOTAL PRECIPITATION FOR THE YEAR WAS 4.17 INCHES
BELOW NORMAL. ACCORDING TO THE U.S. DROUGHT MONITOR, EXTREME
NORTHERN INDIANA WAS DECLARED "ABNORMALLY DRY", WHILE SOUTHERN
MICHIGAN WAS IN A "MODERATE DROUGHT". BY THE END OF THIS MONTH, THE
YEAR`S PRECIPITATION TOTAL WAS 1.59 INCHES ABOVE NORMAL. THIS CHANGE
IS LARGELY THE RESULT OF A STATIONARY FRONT THAT MOVED IN LATE IN
THE MONTH WHICH BECAME THE FOCUS FOR NUMEROUS ROUNDS OF RAIN AND
THUNDERSTORMS.

FOUR TO SEVEN INCHES OF RAIN FELL IN THE GREATER SOUTH BEND AREA
FROM THE 25TH AND 26TH. THE SOUTH BEND AIRPORT RECEIVED AN
IMPRESSIVE 1.84 INCHES (25TH), FOLLOWED BY AN INCREDIBLE 4.30 INCHES
THE NEXT DAY! OF COURSE, THAT SHATTERED THE OLD RECORD OF 1.87
INCHES IN 1994. THE GREATEST SINGLE-DAY PRECIPITATION TOTAL FOR JUNE
IS 4.69 INCHES WHICH OCCURRED ON JUNE 25, 1968.

THE RAIN TOTAL FOR THE MONTH WAS 9.67 INCHES WHICH IS 5.63 INCHES
ABOVE NORMAL. THIS RANKS AS THE 2ND WETTEST JUNE ON RECORD.

TEMPERATURES WERE GENERALLY ABOVE NORMAL FOR THE MONTH WITH THE
EXCEPTION OF A COOL SPELL FROM THE 21ST TO 23RD. THE MORNING LOW OF
46 ON THE 22ND WAS 14 DEGREES BELOW NORMAL AND SEVEN DEGREES AWAY
FROM THE RECORD LOW. ON THE OTHER HAND, SOUTH BEND RECORDED ITS
FIRST THREE 90-DEGREE DAYS (6/5, 11, 12). THE AVERAGE FIRST 90-
DEGREE DAY IS JUNE 11TH. BY THE END OF JUNE LAST YEAR, SOUTH BEND
HAD ALREADY OBSERVED FIVE 90-DEGREE DAYS.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 73.0 DEGREES WHICH IS 4.2
DEGREES ABOVE NORMAL. THIS RANKS AS THE 8TH WARMEST JUNE ON RECORD.

JULY 2021
...SLIGHTLY COOL AND DRY, BUT HUMID...

THIS MONTH`S AVERAGE TEMPERATURE FINISHED AT 73.4 DEGREES, WHICH IS
0.1 DEGREE ABOVE NORMAL AND RANKED AS THE 53RD WARMEST JULY ALL
TIME. SOUTH BEND HAD 3 DAYS REACHING 90 DEGREES OR HIGHER, WHICH IS
THE LOWEST TOTAL SINCE 2017 WHEN IT HAD 0 90+ DEGREE DAYS AND IS 3.3
DAYS BELOW THE NORMAL NUMBER OF 90+ DEGREE DAYS (6.3). IT ALSO HAD
16 DAYS ONLY FALLING TO 65 DEGREES OR GREATER AS A LOW TEMPERATURE,
WHICH IS 4.4 DAYS ABOVE THE NORMAL TOTAL OF 12.4 DAYS DURING THE
MONTH OF JULY. THIS IS AS A RESULT OF THE HIGH RESIDENCE TIME OF
HIGH HUMIDITY IN THE AREA. PUTTING THAT ALL TOGETHER, THE COOLER
HIGH TEMPERATURES, BUT HIGHER HUMIDITY ALLOWS THE MONTH TO FINISH
OFF AROUND NORMAL IN THE AVERAGE TEMPERATURE CATEGORY.

THIS MONTH`S PRECIPITATION TOTALED 2.39, WHICH IS 1.39 INCH BELOW
THE NORMAL JULY TOTAL OF 3.78. THIS RANKED AS THE 42ND DRIEST JULY
ALL TIME. SOUTH BEND HAD A WET MIDDLE PART OF THE MONTH WHEN IT SAW
8 STRAIGHT DAYS OF RAINFALL (ABOVE 0 INCHES) FROM THE 10TH TO THE
17TH. 8 OR MORE STRAIGHT DAYS OF RAINFALL HAS ONLY HAPPENED 5 OTHER
TIMES IN SOUTH BEND`S PERIOD OF RECORD (2003,1992,1990,1915,1905).
HOWEVER, THE HIGHEST AMOUNT OF RAINFALL THAT FELL ON A SINGLE DAY IN
JULY STAYED BELOW 0.75 INCHES HELPING TO KEEP THE TOTAL RAINFALL FOR
THE MONTH BELOW NORMAL AND REFLECTED THE SUMMER TIME HIT-OR-MISS
NATURE OF STORMS, WHICH WERE COMMON THIS MONTH.

AUGUST 2021
...HOT AND WET...

THIS MONTH`S AVERAGE TEMPERATURE FINISHED AT 75.6 DEGREES, WHICH IS
4.9 DEGREE(S) ABOVE NORMAL AND RANKED AS THE XX WARMEST AUGUST WHEN
COMPARED TO THE PERIOD OF RECORD. SOUTH BEND HAD 5 DAYS REACHING 90
DEGREES OR HIGHER, WHICH IS 1 DAY HIGHER THAN THE AVERAGE OF 4.2
DAYS 90 DEGREE DAYS DURING THE MONTH OF AUGUST. IT ALSO HAD 18 DAYS
ONLY FALLING TO 65 DEGREES OR GREATER AS A LOW TEMPERATURE, WHICH IS
8.2 DAYS ABOVE THE NORMAL TOTAL OF 9.8 DAYS DURING THE MONTH OF
AUGUST. THIS IS AS A RESULT OF THE HIGH RESIDENCE TIME OF HIGH
HUMIDITY IN THE AREA. PUTTING THAT ALL TOGETHER, THE WARMER HIGH
TEMPERATURES, AND HIGHER HUMIDITY ALLOWS THE MONTH TO FINISH OFF
ABOVE NORMAL IN THE AVERAGE TEMPERATURE CATEGORY.

SOUTH BEND HAD 3 SEVERE WEATHER-AIDED RAINFALL TOTALS EXCEEDING 0.5
INCH ON THE 6TH (1.16), 10TH (2.55), AND 11TH (0.65) AND ANOTHER
RAINFALL EVENT TOTALLING 0.86 INCH ON THE 24TH. THESE RAINFALL
TOTALS HELPED SOUTH BEND REACH 5.50 INCHES OF PRECIPITATION FOR THE
MONTH, WHICH IS 1.49 ABOVE THE NORMAL AUGUST TOTAL OF 4.01 INCHES.
THIS RANKED AS THE 19TH WETTEST AUGUST WHEN COMPARED TO THE PERIOD OF
RECORD.

$$
ROLLER/BROWN


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