Climatological Report (Monthly)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
349
CXGM50 PGUM 040309
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
109 PM CHST SAT JAN 04 2025
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...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1945 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 91 12/15/2014
12/03/2012
12/02/1994
LOW 68 12/31/1962
HIGHEST 88 12/02 87 12/15
12/20
12/29
LOWEST 74 12/19 74 12/17
12/29 12/28
12/31
AVG. MAXIMUM 86.3 86.8 -0.5 86.2
AVG. MINIMUM 76.5 76.8 -0.3 76.6
MEAN 81.4
DAYS MAX >= 90 0 0.9 -0.9 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 25.35 2002 (TYPHOON PONGSONA)
MINIMUM 1.46 2019
TOTALS 4.70 5.30 -0.60 5.49
DAILY AVG. 0.15 0.17 -0.02 0.18
DAYS >= .01 22 22.7 -0.7 28
DAYS >= .10 12 11.5 0.5 16
DAYS >= .50 3 2.7 0.3 3
DAYS >= 1.00 0 0.8 -0.8 1
DAYS >= 3.00 0
GREATEST
24 HR. TOTAL 1.20 12/19 TO 12/20 1.37
SNOWFALL (INCHES)
TOTALS 0.0
SINCE 7/1 0
GREATEST
SNOW DEPTH 0
DEGREE DAYS
COOLING TOTAL 515 521 -6 516
SINCE 1/1 6151 6205 -54 6054
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 11.6
RESULTANT WIND SPEED/DIRECTION 11/080
HIGHEST WIND SPEED/DIRECTION 29/070 DATE 12/18
29/140 12/19
HIGHEST GUST SPEED/DIRECTION 40/070 DATE 12/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.36
NUMBER OF DAYS FAIR 13
NUMBER OF DAYS PC 18
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 81
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 HEAVY RAIN 9
RAIN 11 LIGHT RAIN 25
FOG 0 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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