Climatological Report (Monthly)
Issued by NWS
Issued by NWS
943
CXUS53 KDTX 021438 RRB
CLMMBS
CLIMATE REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1038 AM EDT THU OCT 02 2025
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...THE TRI CITIES MI CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1912 TO 2025
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 09/18 MM MM
LOWEST 40 09/08 MM MM
AVG. MAXIMUM 74.9 73.3 1.6
AVG. MINIMUM 53.3 51.6 1.7
MEAN 64.1 62.5 1.6
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 2.44 2.81 -0.37
DAILY AVG. 0.08 0.09 -0.01
DAYS >= .01 6 9.7 -3.7
DAYS >= .10 3 5.5 -2.5
DAYS >= .50 2 1.9 0.1
DAYS >= 1.00 2 0.6 1.4
GREATEST
24 HR. TOTAL 1.17 09/18 TO 09/18
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 62 136 -74
SINCE 7/1 96 165 -69
COOLING TOTAL 41 60 -19
SINCE 1/1 729 625 104
FREEZE DATES
RECORD
EARLIEST 09/12 (1943)
LATEST 05/28 (1949)
EARLIEST 10/17 (2024)
LATEST 04/30 (2025)
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WIND (MPH)
AVERAGE WIND SPEED 6.1
HIGHEST WIND SPEED/DIRECTION 35/250 DATE 09/05
HIGHEST GUST SPEED/DIRECTION 50/240 DATE 09/05
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.28
NUMBER OF DAYS FAIR 21
NUMBER OF DAYS PC 7
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 72
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 2
LIGHT RAIN 7 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 8
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$
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SOUTHEAST MICHIGAN CLIMATE SUMMARY FOR SEPTEMBER 2025
SEPTEMBER 2025 MONTHLY STATISTICS AND RANKINGS
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PRECIPITATION
ACTUAL NORMAL DEPARTURE RANKING
DETROIT AREA 1.87" 3.22" -1.35" 53RD DRIEST
FLINT AREA 1.32" 2.90" -1.58" 17TH DRIEST
SAGINAW AREA 2.44" 2.81" -0.37" 50TH DRIEST
PRECIPITATION SINCE JANUARY 1*
ACTUAL NORMAL DEPARTURE RANKING
DETROIT AREA 25.49" 26.97" -1.48" 65TH WETTEST
FLINT AREA 20.93" 25.04" -4.11" 33RD DRIEST
SAGINAW AREA 20.41" 25.08" -4.67" 35TH DRIEST
*NORMAL TO DATE (AS OF SEPTEMBER 30, 2025)
AVERAGE TEMPERATURE
ACTUAL NORMAL DEPARTURE RANKING
DETROIT AREA 67.1 64.9 +2.2 23RD WARMEST
FLINT AREA 63.2 61.7 +1.5 36TH WARMEST
SAGINAW AREA 64.1 62.5 +1.6 23RD WARMEST
AVERAGE HIGH TEMPERATURE
ACTUAL NORMAL DEPARTURE RANKING
DETROIT AREA 77.9 74.4 +3.5 10TH WARMEST
FLINT AREA 76.8 73.1 +3.7 15TH WARMEST
SAGINAW AREA 74.9 73.3 +1.6 23RD WARMEST
AVERAGE LOW TEMPERATURE
ACTUAL NORMAL DEPARTURE RANKING
DETROIT AREA 56.2 55.5 +0.7 54TH WARMEST
FLINT AREA 49.5 50.4 -0.9 33RD COOLEST
SAGINAW AREA 53.3 51.6 +1.7 23RD WARMEST
DETROIT AREA HAS A CLIMATE RECORD DATING TO NOVEMBER 1874 (~151 YEARS)
FLINT AREA HAS A CLIMATE RECORD DATING TO JANUARY 1921 (~105 YEARS)
SAGINAW AREA HAS CLIMATE RECORD DATING TO JANUARY 1912 (~114 YEARS)