Climatological Report (Monthly)
Issued by NWS
Issued by NWS
424
CXCA52 TJSJ 010944
CLMIST
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN JUAN PR
544 AM AST THU OCT 01 2026
...................................
...THE CYRIL E. KING AP/ST THOMAS CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1953 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 102 09/11/2026
LOW 64 09/17/1972
HIGHEST 92 09/29 92 0 94
LOWEST 79 09/25 80 -1 75
09/29
AVG. MAXIMUM 89.5 89.2 0.3 90.2
AVG. MINIMUM 80.4 79.5 0.9 80.7
MEAN 84.9 84.4 0.5 85.5
DAYS MAX >= 90 4 12.2 -8.2 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 14.94 1953
MINIMUM 0.92 2012
TOTALS 0.49R 5.89 -5.40 5.42
DAILY AVG. 0.05 0.20 -0.15 0.25
DAYS >= .01 6 15.2 -9.2 14
DAYS >= .10 1 8.5 -7.5 8
DAYS >= .50 0 2.5 -2.5 2
DAYS >= 1.00 0 1.0 -1.0 1
GREATEST
24 HR. TOTAL 0.27 09/29 TO 09/30
STORM TOTAL 0.19
DEGREE DAYS
HEATING TOTAL 0 0 0 0
SINCE 7/1 0
COOLING TOTAL 202 580 -378 454
SINCE 1/1 4433
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 9.4
HIGHEST WIND SPEED/DIRECTION 20/130 DATE 09/29
HIGHEST GUST SPEED/DIRECTION 30/120 DATE 09/30
SKY COVER
AVERAGE SKY COVER 0.22
AVERAGE RH (PERCENT) 75
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 7 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 5 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 6 FOG W/VIS <= 1/4 MILE 0
HAZE 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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