STATION: ST JOHNS INDUS AIRPK ARPT (KSJN), AZ
CLIMATOLOGICAL SUMMARY. Period of Record: May 1999 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 | 51.6 55.4 62.6 71.9 82.3 90.9 92.3 87.9 83.5 72.7 60.7 49.4 | 71.8
Avg Min Temp | 21.6 24.5 29.5 37.4 46.8 55.1 62.4 60.0 51.8 39.4 27.5 19.6 | 39.6
Avg Temperature | 36.6 39.9 46.1 54.6 64.5 73.0 77.3 73.9 67.6 56.1 44.1 34.5 | 55.7
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Extremes: | |
Extreme Max Temp| 72 74 87 88 99 101 107 101 95 92 82 72 | 107
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Date of Ext-Day | 16 01 20 28 20 20 18 10 28 01 10 01 |
-Year| 2000 2003 2004 2007 2005 2005 2005 2003 2003 2003 2005 2003 |
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Extreme Min Temp| -2 -1 -2 21 23 36 48 45 31 18 -2 -6 | -6
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Date of Ext-Day | 31 01 13 08 02 15 02 25 25 13 30 13 |
-Year| 2002 2002 2006 2003 2008 2001 2004 2002 2000 2008 2006 2001 |
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Heating Degree Days | 881 708 587 312 93 6 0 0 28 285 627 945 | 4474
Cooling Degree Days | 0 0 0 1 78 246 383 278 106 8 0 0 | 1100
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 5.1 19.4 20.7 12.1 3.8 0.1 0.0 0.0 | 61.2
Max Temp >= 75 | 0.1 0.0 3.6 13.7 26.0 29.5 31.0 30.8 28.3 14.6 1.8 0.0 | 179.3
Max Temp <= 32 | 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.8 | 3.1
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Min Temp <= 32 | 27.1 22.8 19.7 7.4 1.1 0.0 0.0 0.0 0.1 6.3 21.7 29.3 | 135.5
Min Temp <= 20 | 13.9 8.9 4.3 0.0 0.0 0.0 0.0 0.0 0.0 0.5 6.2 17.3 | 51.0
Min Temp <= 0 | 0.1 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.4 | 0.9
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Avg Dew Point Temp | 18.7 18.1 19.6 19.9 24.9 30.0 46.7 50.9 40.3 30.7 20.5 17.3 | 28.1
Avg Wet Bulb Temp | 29.4 31.6 35.7 40.3 46.4 51.8 59.3 59.7 53.0 44.0 34.4 27.8 | 42.8
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Avg Sea Level Pres | 30.12 30.04 29.97 29.89 29.83 29.81 29.87 29.91 29.91 29.97 30.07 30.13 | 29.96
(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 0.3 0.9 2.1 2.4 3.4 8.8 10.3 4.0 3.2 0.4 0.0 | 36.0
Heavy Fog | 1.9 0.9 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.4 1.5 | 5.9
Fog | 7.9 3.2 4.0 1.7 0.5 0.1 2.0 1.7 1.8 2.4 2.5 6.5 | 34.4
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 | 0.31 0.45 0.45 0.34 0.26 0.13 1.32 1.81 0.80 0.81 0.39 0.42 | 7.48
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Maximum Daily | 0.44 0.34 0.72 0.38 0.64 0.19 1.03 2.47 1.14 0.80 0.39 0.42 | 2.47
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Date of Ext-Day | 28 12 11 24 22 28 12 04 10 23 04 01 |
-Year| 2008 2005 2006 2005 2008 2004 2008 2007 2002 2000 2000 2007 |
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Avg Number of Days: | |
>= 0.01 | 4.7 4.4 4.6 3.2 2.0 2.4 9.0 11.2 5.1 5.7 3.2 5.0 | 60.5
>= 0.10 | 0.9 1.4 1.5 1.2 0.9 0.5 4.2 4.1 2.2 2.8 1.4 1.4 | 22.5
>= 0.25 | 0.2 0.7 0.6 0.6 0.4 0.0 1.8 2.5 1.0 1.3 0.5 0.5 | 10.0
>= 0.50 | 0.0 0.0 0.1 0.0 0.1 0.0 0.3 0.6 0.4 0.2 0.0 0.0 | 1.7
>= 1.00 | 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.1 0.0 0.0 0.0 | 0.4
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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| 6.3 7.6 8.5 10.3 9.4 9.2 7.6 6.4 6.7 6.4 6.1 6.0 | 7.5
Daily Avg Max 2-Min | 17.9 21.4 22.9 27.0 26.1 26.2 25.6 22.9 21.4 18.9 17.5 17.6 | 22.1
Daily Avg Peak Gust | 21.7 26.5 28.9 34.0 33.1 33.3 31.8 28.2 27.0 23.7 21.5 21.4 | 27.6
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Maximum Daily Avg | 22.0 24.1 25.5 23.4 23.6 24.7 12.7 12.1 18.7 22.9 26.0 24.8 | 26.0
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Maximum 2-Minute Avg| 45 52 45 52 49 49 48 40 46 41 49 45 | 52
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Date of Max 2min-Day| 28 03 30 29 18 16 31 16 10 11 22 01 |
-Year| 2008 2008 2008 2004 2002 2000 2001 2008 2002 2008 2003 2007 |
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Maximum Peak Gust | 58 64 62 62 62 61 62 52 56 60 60 59 | 64
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Date of Max Gust-Day| 28 03 18 30 18 16 08 14 10 11 25 25 |
-Year| 2008 2008 2006 2008 2002 2000 2005 2007 2002 2008 2001 2008 |
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Avg Number of Days: | |
Peak Gust >=30 | 6.9 10.6 13.7 19.0 20.3 21.5 17.8 12.6 10.8 7.8 5.1 6.9 | 153.0
Peak Gust >=40 | 2.3 3.5 4.8 8.7 6.3 4.7 4.9 1.7 2.3 1.5 2.0 3.2 | 46.0
Peak Gust >=50 | 0.5 0.9 0.9 2.0 0.8 0.8 0.8 0.2 0.1 0.3 0.6 0.7 | 8.5
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Max 2-Minute >=30| 3.6 5.4 6.5 11.3 9.9 7.4 8.3 4.0 3.0 2.9 2.8 0.0 | 65.2
Max 2-Minute >=40| 0.3 0.9 0.7 2.2 1.0 0.6 1.1 0.1 0.1 0.2 0.8 0.0 | 8.0
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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.