Climatological Report (Monthly)
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
010
CXGM50 PGUM 040746
CLMGUM
CLIMATE REPORT
NATIONAL WEATHER SERVICE TIYAN GUAM
546 PM CHST THU JUN 04 2026
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...THE GUAM INTERNATIONAL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF MAY 2026...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1945 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 94 05/30/1971
LOW 70 05/23/1951
05/03/1993
HIGHEST 88 05/01 91 05/24
05/05
LOWEST 75 05/05 75 05/11
AVG. MAXIMUM 86.4 88.6 -2.2 88.7
AVG. MINIMUM 77.8 77.8 0.0 77.9
MEAN 82.1
DAYS MAX >= 90 0 8.7 -8.7 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 31.15 2023 2023 (02W TYPHOON MAWAR 24.71")
MINIMUM 0.40 1987
TOTALS 8.89 4.45 4.44 1.98
DAILY AVG. 0.29 0.14 0.15 0.06
DAYS >= .01 24 19.7 4.3 21
DAYS >= .10 16 9.4 6.6 9
DAYS >= .50 4 2.3 1.7 0
DAYS >= 1.00 2 0.7 1.3 0
DAYS >= 3.00 0
GREATEST
24 HR. TOTAL 2.72 05/27 TO 05/27 0.24 05/27
DEGREE DAYS
COOLING TOTAL 539 564 -25 576
SINCE 1/1 2392 2512 -120 2564
FREEZE DATES
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WIND (MPH)
AVERAGE WIND SPEED 12.4
RESULTANT WIND SPEED/DIRECTION 12/090
HIGHEST WIND SPEED/DIRECTION 24/090 DATE 05/06
HIGHEST GUST SPEED/DIRECTION 38/070 DATE 05/03
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.45
NUMBER OF DAYS FAIR 7
NUMBER OF DAYS PC 23
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 80
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 HEAVY RAIN 9
RAIN 10 LIGHT RAIN 26
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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