STATION: GUAM INTL AIRPORT (PGUM), PI
CLIMATOLOGICAL SUMMARY. Period of Record: Jul 1996 to Dec 2008
Summaries based on unedited daily ASOS data. Errors may be present.
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TEMPERATURE (F) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Avg Max Temp | 85.8 85.8 86.7 88.0 88.1 87.7 87.2 86.7 86.8 87.3 87.1 86.5 | 87.0
Avg Min Temp | 75.4 75.4 75.9 77.0 77.5 77.5 76.7 76.3 75.9 76.8 77.0 76.7 | 76.5
Avg Temperature | 80.6 80.6 81.3 82.5 82.8 82.6 81.9 81.5 81.3 82.0 82.1 81.6 | 81.7
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Extremes: | |
Extreme Max Temp| 89 89 92 92 92 92 92 91 91 91 90 89 | 92
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Date of Ext-Day | 03 23 31 30 30 02 11 27 01 02 03 06 |
-Year| 2008 2001 2006 2006 1997 2001 1996 1999 1996 2001 1996 1998 |
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Extreme Min Temp| 66 68 70 71 72 72 71 72 71 72 71 71 | 66
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Date of Ext-Day | 18 24 17 06 02 23 09 08 16 16 07 02 |
-Year| 2000 2003 1997 2002 1998 1997 2006 1996 1996 1999 2001 2003 |
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Heating Degree Days | 0 0 0 0 0 0 0 0 0 0 0 0 | 0
Cooling Degree Days | 483 440 505 525 552 529 524 511 490 528 513 515 | 6115
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.1 3.4 4.2 5.2 2.2 2.1 1.2 2.3 1.6 0.0 | 22.2
Max Temp >= 75 | 31.0 28.2 31.0 30.0 31.0 30.0 31.0 31.0 30.0 31.0 30.0 31.0 | 365.2
Max Temp <= 32 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
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Min Temp <= 32 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
Min Temp <= 20 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
Min Temp <= 0 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
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Avg Dew Point Temp | 71.8 72.3 72.3 73.7 74.5 75.2 75.4 75.4 75.2 75.2 75.2 73.9 | 74.2
Avg Wet Bulb Temp | 74.2 74.6 74.9 76.2 76.7 77.3 77.1 77.1 76.8 76.9 77.2 76.1 | 76.3
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Avg Sea Level Pres | 29.87 29.87 29.87 29.86 29.85 29.85 29.83 29.81 29.81 29.81 29.81 29.85 | 29.84
(Inches of Mercury) | |
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WEATHER | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
See disclaimer below| |
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Avg Number of Days: | |
Thunderstorms | 0.2 0.2 0.0 0.2 1.3 2.6 4.9 5.6 5.4 3.6 1.9 0.6 | 26.4
Heavy Fog | 0.0 0.0 0.0 0.0 0.2 0.4 0.5 0.3 0.5 0.3 0.1 0.2 | 2.5
Fog | 10.3 10.9 10.2 9.5 10.7 12.6 12.1 11.4 10.2 11.4 11.2 11.1 | 131.7
Hail | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
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PRECIPITATION (In) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Average Monthly | 4.25 4.93 2.68 2.46 3.88 8.98 12.71 16.88 14.06 10.63 9.29 7.47 | 98.22
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Maximum Daily | 2.29 3.60 2.03 2.89 2.26 6.00 9.35 7.52 4.93 5.43 4.69 13.81 | 13.81
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Date of Ext-Day | 08 14 11 30 24 27 05 22 26 18 16 16 |
-Year| 2002 1999 2003 2003 2007 2004 2002 2004 2002 2003 2003 1997 |
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Avg Number of Days: | |
>= 0.01 | 19.2 18.6 17.8 18.4 20.8 24.6 25.8 25.6 24.6 25.5 24.4 22.8 | 268.1
>= 0.10 | 9.8 9.8 7.5 7.2 9.8 15.8 18.3 18.7 18.0 17.5 15.2 11.7 | 159.2
>= 0.25 | 4.4 4.6 2.8 2.5 4.1 8.4 12.5 14.0 13.6 11.6 10.4 6.5 | 95.4
>= 0.50 | 2.4 2.6 1.2 0.5 1.8 5.2 7.4 9.2 9.0 6.5 5.7 2.9 | 54.4
>= 1.00 | 0.8 0.9 0.2 0.2 0.5 2.0 3.8 5.4 4.4 2.5 2.6 1.2 | 24.4
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WIND (MPH) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Daily Avg Wind Speed| 12.2 12.1 11.8 11.1 9.5 8.9 7.2 6.9 5.8 7.2 10.7 11.8 | 9.6
Daily Avg Max 2-Min | 20.3 20.4 19.8 19.2 17.3 17.2 16.1 16.1 15.0 16.4 19.5 20.3 | 18.1
Daily Avg Peak Gust | 25.2 25.6 24.8 24.3 22.2 22.1 21.1 21.0 19.8 21.4 24.8 25.4 | 23.1
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Maximum Daily Avg | 19.7 22.1 20.6 22.0 16.6 31.4 32.1 27.5 15.0 18.5 23.0 40.8 | 40.8
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Maximum 2-Minute Avg| 34 32 35 32 37 47 74 52 36 32 49 58 | 74
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Date of Max 2min-Day| 24 12 02 15 16 28 05 22 01 18 08 16 |
-Year| 2000 2004 2002 2003 2002 2004 2002 2004 2005 2003 1996 1997 |
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Maximum Peak Gust | 41 38 40 41 44 58 90 66 44 43 61 94 | 94
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Date of Max Gust-Day| 23 28 02 15 16 28 05 22 01 28 08 16 |
-Year| 2000 2001 2002 2003 2002 2004 2002 2004 2005 2000 1996 1997 |
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Avg Number of Days: | |
Peak Gust >=30 | 7.9 7.6 5.3 3.6 0.9 2.2 2.6 3.5 1.9 2.9 6.1 7.2 | 51.7
Peak Gust >=40 | 0.2 0.0 0.2 0.2 0.1 0.2 0.8 0.6 0.1 0.2 1.0 0.4 | 3.8
Peak Gust >=50 | 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.2 0.0 0.0 0.3 0.1 | 0.9
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Max 2-Minute >=30| 0.5 0.9 0.7 0.6 0.3 0.3 0.7 0.6 0.2 0.3 1.3 0.0 | 6.4
Max 2-Minute >=40| 0.0 0.0 0.0 0.0 0.0 0.2 0.2 0.2 0.0 0.0 0.1 0.0 | 0.6
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Observations of WEATHER may me innacurate due to early ASOS inconsistancies. Average days
with Thunderstorms may be low due to early mis-detection.
Heavy Fog = Visibility less than or equal to 1/4 mile.
Fog = Visibility greater than 1/4 mile or less than 7 miles.
Peak Gust = Maximum 5-second average.
Snowfall data not observed at ASOS stations.
Copyright ©2009 Western Regional Climate Center - Desert Research Institute - Reno, Nevada.