Climatological Report (Monthly)
Issued by NWS
Issued by NWS
160
CXUS56 KSEW 011050
CLMBLI
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
350 AM PDT WED OCT 01 2025
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...THE BELLINGHAM WA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1949 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 89 09/20/1974
09/14/1951
LOW 28 09/27/1972
HIGHEST 85 09/16 MM MM 85 09/05
LOWEST 43 09/23 MM MM 36 09/30
AVG. MAXIMUM 70.0 68.1 1.9 67.1
AVG. MINIMUM 52.1 49.6 2.5 49.6
MEAN 61.1 58.9 2.2 58.3
DAYS MAX >= 90 0 0.0 0.0 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 4.73 2019
MINIMUM 0.00 2012
TOTALS 1.35 2.01 -0.66 2.00
DAILY AVG. 0.05 0.07 -0.02 0.07
DAYS >= .01 8 11.0 -3.0 7
DAYS >= .10 3 5.3 -2.3 6
DAYS >= .50 1 1.0 0.0 1
DAYS >= 1.00 0 0.0 0.0 1
GREATEST
24 HR. TOTAL 0.76 09/29 TO 09/30
DEGREE DAYS
HEATING TOTAL 116 189 -73 202
SINCE 7/1 205 321 -116 MM
COOLING TOTAL 5 4 1 10
SINCE 1/1 92 75 17 MM
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WIND (MPH)
AVERAGE WIND SPEED 4.4
HIGHEST WIND SPEED/DIRECTION 25/160 DATE 09/30
HIGHEST GUST SPEED/DIRECTION 39/130 DATE 09/30
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.40
NUMBER OF DAYS FAIR 14
NUMBER OF DAYS PC 12
NUMBER OF DAYS CLOUDY 4
AVERAGE RH (PERCENT) 79
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 9 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 25 FOG W/VIS <= 1/4 MILE 7
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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