STATION: JUNEAU INTERNATIONAL AIRPORT (PAJN), AK
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 | 32.7 36.0 38.6 48.0 56.7 62.7 63.4 62.4 54.8 47.2 38.3 35.1 | 48.0
Avg Min Temp | 23.8 25.8 26.6 32.1 39.9 46.6 49.9 48.6 44.3 37.5 29.0 26.5 | 35.9
Avg Temperature | 28.3 30.9 32.6 40.1 48.3 54.6 56.6 55.5 49.5 42.4 33.7 30.8 | 41.9
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Extremes: | |
Extreme Max Temp| 52 53 61 74 75 85 83 84 73 61 62 54 | 85
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Date of Ext-Day | 07 23 21 26 21 19 15 10 03 03 24 23 |
-Year| 2001 2004 1998 2003 1997 2004 2004 2004 1996 2003 2004 1999 |
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Extreme Min Temp| -5 -8 -3 13 26 33 39 37 28 20 -5 -2 | -8
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Date of Ext-Day | 12 08 17 03 03 09 21 28 30 30 27 31 |
-Year| 2005 2008 2006 2007 2002 2008 2008 2007 1996 2003 2006 1996 |
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Heating Degree Days | 1138 963 1004 748 519 313 261 295 464 702 940 1060 | 8406
Cooling Degree Days | 0 0 0 0 0 2 1 1 0 0 0 0 | 3
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Avg Number of Days: | |
Max Temp >= 90 | 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
Max Temp >= 75 | 0.0 0.0 0.0 0.0 0.2 2.3 2.3 2.8 0.0 0.0 0.0 0.0 | 7.6
Max Temp <= 32 | 12.3 6.3 4.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.1 10.0 | 38.7
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Min Temp <= 32 | 23.2 20.7 21.3 14.6 2.6 0.0 0.0 0.0 1.2 7.5 17.2 21.3 | 129.5
Min Temp <= 20 | 10.4 6.6 6.5 1.5 0.0 0.0 0.0 0.0 0.0 0.4 5.4 7.2 | 38.1
Min Temp <= 0 | 0.7 0.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.4 | 2.1
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Avg Dew Point Temp | 25.4 26.3 25.7 32.2 39.4 47.1 51.3 50.6 46.2 39.3 31.2 27.4 | 36.8
Avg Wet Bulb Temp | 28.2 28.9 30.6 37.1 44.2 50.7 53.5 52.8 47.9 41.0 33.3 29.9 | 39.8
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Avg Sea Level Pres | 30.20 30.14 30.12 30.04 30.04 30.02 30.01 29.99 30.06 30.10 30.09 30.23 | 30.09
(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 | 0.1 0.0 0.0 0.0 0.0 0.2 0.2 0.2 0.0 0.0 0.0 0.2 | 0.8
Heavy Fog | 3.1 3.5 2.3 1.4 0.9 0.8 0.5 1.2 3.1 4.3 3.5 3.8 | 28.3
Fog | 18.8 16.9 16.9 16.4 12.6 11.9 14.2 16.9 20.1 22.8 19.0 18.2 | 204.6
Hail | 0.5 0.2 0.6 0.5 0.3 0.0 0.0 0.0 0.0 0.0 0.2 0.4 | 2.6
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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 | 5.05 3.98 3.75 3.45 3.29 3.08 5.58 6.19 9.63 10.05 5.88 6.84 | 66.78
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Maximum Daily | 2.06 1.48 1.18 1.49 1.29 1.61 2.39 1.60 3.35 3.47 3.45 2.67 | 3.47
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Date of Ext-Day | 27 13 29 15 16 28 22 31 25 20 21 27 |
-Year| 2000 2001 1998 1999 2008 2000 2001 1998 1996 1998 2005 1999 |
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Avg Number of Days: | |
>= 0.01 | 20.3 17.9 19.0 17.6 16.7 16.0 20.2 20.7 24.5 24.7 20.0 20.8 | 238.4
>= 0.10 | 12.3 10.5 11.3 9.5 9.4 7.6 12.4 13.5 18.6 19.5 13.2 13.5 | 151.3
>= 0.25 | 7.2 5.9 5.1 4.7 4.5 4.5 6.7 9.1 13.2 12.4 7.2 9.2 | 89.7
>= 0.50 | 3.2 2.2 1.8 1.6 1.7 1.8 3.5 4.2 7.0 6.8 3.4 4.4 | 41.7
>= 1.00 | 0.7 0.4 0.1 0.4 0.3 0.2 0.9 1.2 1.9 2.1 1.0 1.3 | 10.4
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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| 7.1 6.4 7.7 7.7 7.5 6.1 6.2 6.3 7.7 8.1 6.9 7.4 | 7.1
Daily Avg Max 2-Min | 17.5 16.5 19.0 18.5 17.5 14.9 14.7 15.4 17.8 19.4 17.7 18.7 | 17.3
Daily Avg Peak Gust | 21.4 20.2 23.4 22.6 21.2 18.2 17.8 18.8 22.3 24.3 22.2 23.2 | 21.3
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Maximum Daily Avg | 25.4 24.7 26.5 22.2 22.3 14.7 16.7 21.8 24.2 28.2 27.3 25.1 | 28.2
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Maximum 2-Minute Avg| 45 46 40 37 36 26 30 38 41 47 47 48 | 48
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Date of Max 2min-Day| 03 10 28 01 06 21 20 28 07 29 03 10 |
-Year| 2001 2002 2004 1999 1999 2006 2003 1999 2001 2004 2001 1998 |
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Maximum Peak Gust | 56 54 49 49 47 33 39 48 53 61 61 68 | 68
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Date of Max Gust-Day| 03 10 25 02 06 21 19 28 14 21 03 10 |
-Year| 2001 2002 2000 2005 1999 2006 2008 1999 2000 2007 2001 1998 |
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Avg Number of Days: | |
Peak Gust >=30 | 6.9 5.6 8.5 6.5 3.7 0.7 1.4 3.0 6.3 9.6 7.6 8.8 | 68.7
Peak Gust >=40 | 2.6 1.6 1.8 1.1 0.6 0.0 0.0 0.5 1.8 3.3 1.7 2.9 | 17.9
Peak Gust >=50 | 0.8 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.0 0.5 0.7 | 3.5
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Max 2-Minute >=30| 3.2 2.3 3.4 1.9 1.0 0.0 0.1 0.9 2.6 4.9 2.9 0.0 | 23.1
Max 2-Minute >=40| 0.8 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.2 0.9 0.6 0.0 | 2.8
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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.