615  
CXUS53 KDTX 011201 RRB  
CLMMBS  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
801 AM EDT TUE OCT 01 2024  
   
...............................  
 
...THE TRI CITIES MI CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 1912 TO 2024  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE  
NORMAL    
..........................................................  
 
TEMPERATURE (F)  
RECORD  
HIGH 100 09/01/1953  
09/11/1931  
LOW 27 09/28/1991  
09/29/1942  
HIGHEST 87 09/15 MM MM  
09/16  
09/20  
LOWEST 41 09/08 MM MM  
AVG. MAXIMUM 78.9 73.3 5.6  
AVG. MINIMUM 53.9 51.6 2.3  
MEAN 66.4 62.5 3.9  
DAYS MAX >= 90 0 0.6 -0.6  
DAYS MAX <= 32 0 0.0 0.0  
DAYS MIN <= 32 0 0.2 -0.2  
DAYS MIN <= 0 0 0.0 0.0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 16.16 1986  
MINIMUM T 1979  
TOTALS 0.75 2.81 -2.06  
DAILY AVG. 0.03 0.09 -0.06  
DAYS >= .01 5 9.7 -4.7  
DAYS >= .10 4 5.5 -1.5  
DAYS >= .50 0 1.9 -1.9  
DAYS >= 1.00 0 0.6 -0.6  
GREATEST  
24 HR. TOTAL 0.33 09/05 TO 09/06  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 0.0 0  
TOTALS 0.0 0.0 0.0  
LIQUID EQUIV 0.00 0.00 0.00  
SINCE 7/1 0.0 0.0 0.0  
LIQUID 7/1 0.00  
DAYS >= TRACE 0 0.0 0.0  
DAYS >= 1.0 0 0.0 0.0  
GREATEST  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING TOTAL 43 136 -93  
SINCE 7/1 57 165 -108  
COOLING TOTAL 94 60 34  
SINCE 1/1 767 625 142  
 
FREEZE DATES  
RECORD  
EARLIEST 09/12 (1943)  
LATEST 05/28 (1949)  
EARLIEST 10/23 (2023)  
LATEST 04/26 (2024)    
..........................................................  
 
WIND (MPH)  
AVERAGE WIND SPEED 7.2  
HIGHEST WIND SPEED/DIRECTION 28/040 DATE 09/28  
HIGHEST GUST SPEED/DIRECTION 36/040 DATE 09/28  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.24  
NUMBER OF DAYS FAIR 22  
NUMBER OF DAYS PC 5  
NUMBER OF DAYS CLOUDY 3  
 
AVERAGE RH (PERCENT) 67  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 2 MIXED PRECIP 0  
HEAVY RAIN 1 RAIN 4  
LIGHT RAIN 4 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 0 SNOW 0  
LIGHT SNOW 0 SLEET 0  
FOG 14 FOG W/VIS <= 1/4 MILE 4  
HAZE 6  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
================================================================  
SOUTHEAST MICHIGAN CLIMATE SUMMARY FOR SEPTEMBER 2024  
 
SEPTEMBER 2024 MONTHLY STATISTICS AND RANKINGS  
-----------------------------------------------------------------  
 
PRECIPITATION  
ACTUAL NORMAL DEPARTURE RANKING  
DETROIT AREA 1.22" 3.22" -2.00" 20TH DRIEST  
FLINT AREA 1.01" 2.90" -1.89" 11TH DRIEST  
SAGINAW AREA 0.75" 2.81" -2.06" 5TH DRIEST  
 
PRECIPITATION SINCE JANUARY 1*  
ACTUAL NORMAL DEPARTURE RANKING  
DETROIT AREA 25.85" 26.97" -1.12" 61ST WETTEST  
FLINT AREA 27.06" 25.04" +2.02" 27TH WETTEST  
SAGINAW AREA 19.59" 25.08" -5.49" 26TH DRIEST  
 
*NORMAL TO DATE (AS OF SEPTEMBER 30, 2024)  
 
AVERAGE TEMPERATURE  
ACTUAL NORMAL DEPARTURE RANKING  
DETROIT AREA 68.2 64.9 +3.3 13TH WARMEST  
FLINT AREA 65.1 61.7 +3.4 13TH WARMEST  
SAGINAW AREA 66.4 62.5 +3.9 5TH WARMEST  
 
AVERAGE HIGH TEMPERATURE  
ACTUAL NORMAL DEPARTURE RANKING  
DETROIT AREA 77.9 74.4 +3.5 10TH WARMEST  
FLINT AREA 77.3 73.1 +4.2 12TH WARMEST  
SAGINAW AREA 78.9 73.3 +5.6 4TH WARMEST  
 
AVERAGE LOW TEMPERATURE  
ACTUAL NORMAL DEPARTURE RANKING  
DETROIT AREA 58.4 55.5 +2.9 18TH WARMEST  
FLINT AREA 52.9 50.4 +2.5 26TH WARMEST  
SAGINAW AREA 53.9 51.6 +2.3 18TH WARMEST  
 
DETROIT AREA HAS A CLIMATE RECORD DATING TO NOVEMBER 1874 (~150 YEARS)  
FLINT AREA HAS A CLIMATE RECORD DATING TO JANUARY 1921 (~104 YEARS)  
SAGINAW AREA HAS CLIMATE RECORD DATING TO JANUARY 1912 (~113 YEARS)  
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