STATION: SPOKANE INTERNATIONAL AIRPORT (KGEG), WA
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 | 34.5 39.8 48.5 56.7 66.3 73.5 85.2 83.7 73.0 58.0 42.6 33.2 | 57.9
Avg Min Temp | 24.1 25.7 30.9 35.2 43.2 49.5 56.5 55.2 46.7 36.4 29.2 22.9 | 38.0
Avg Temperature | 29.3 32.7 39.7 46.0 54.8 61.5 70.9 69.4 59.9 47.2 35.9 28.1 | 47.9
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Extremes: | |
Extreme Max Temp| 56 57 70 81 92 97 103 103 96 86 67 55 | 103
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Date of Ext-Day | 26 27 20 30 17 29 27 17 01 01 12 14 |
-Year| 2003 2005 1999 1998 2006 2008 1998 2008 1998 1997 1999 2002 |
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Extreme Min Temp| -22 3 12 21 24 35 40 40 22 1 -5 -18 | -22
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Date of Ext-Day | 05 17 08 12 08 07 03 28 23 26 22 20 |
-Year| 2004 2006 2002 1997 2002 2002 1999 2000 2000 2000 2003 2008 |
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Heating Degree Days | 1108 912 783 570 329 149 25 31 188 553 871 1145 | 6665
Cooling Degree Days | 0 0 0 0 12 42 208 169 34 1 0 0 | 467
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 0.5 1.3 10.0 8.4 1.5 0.0 0.0 0.0 | 21.6
Max Temp >= 75 | 0.0 0.0 0.0 0.9 5.7 13.4 27.7 26.0 13.7 1.3 0.0 0.0 | 88.7
Max Temp <= 32 | 11.6 3.2 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.8 12.8 | 31.8
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Min Temp <= 32 | 26.4 24.0 21.1 10.2 2.3 0.0 0.0 0.0 0.5 8.9 19.1 27.5 | 140.0
Min Temp <= 20 | 8.3 6.3 1.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 4.0 9.0 | 29.6
Min Temp <= 0 | 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.7 | 1.9
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Avg Dew Point Temp | 26.1 26.7 29.8 32.1 38.5 43.5 44.5 43.2 39.4 35.0 30.9 25.0 | 34.6
Avg Wet Bulb Temp | 28.3 30.3 35.4 39.9 46.9 52.1 56.5 55.2 49.4 41.3 33.9 27.2 | 41.4
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Avg Sea Level Pres | 30.12 30.13 30.06 30.00 29.97 29.94 29.94 29.94 29.97 30.07 30.14 30.20 | 30.04
(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 | 0.0 0.0 0.2 0.7 1.8 2.0 1.8 1.2 0.5 0.1 0.0 0.0 | 8.2
Heavy Fog | 9.6 5.8 2.2 0.6 0.5 0.1 0.2 0.2 0.5 2.9 6.7 7.3 | 36.5
Fog | 23.7 16.2 12.8 7.4 7.2 4.2 1.5 1.9 3.5 10.6 18.5 21.5 | 129.0
Hail | 0.0 0.3 1.1 0.8 0.5 0.1 0.0 0.0 0.0 0.2 0.1 0.2 | 3.3
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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 | 1.99 1.28 1.43 1.24 1.71 1.13 0.32 0.63 0.55 1.09 2.29 2.58 | 16.24
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Maximum Daily | 0.94 0.65 0.88 1.23 1.11 0.89 0.72 1.06 0.59 0.98 1.24 1.18 | 1.24
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Date of Ext-Day | 10 27 27 13 21 04 09 22 30 18 19 03 |
-Year| 2006 1999 2005 2000 2007 2006 2005 2002 2005 1996 1996 2007 |
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Avg Number of Days: | |
>= 0.01 | 15.5 10.5 11.7 10.2 10.5 7.2 3.4 3.6 5.2 8.4 13.5 14.6 | 114.4
>= 0.10 | 7.0 4.3 5.8 4.0 4.2 3.5 1.0 1.6 1.9 3.2 7.2 7.9 | 51.7
>= 0.25 | 2.5 1.6 1.2 1.3 2.0 1.5 0.2 0.9 0.6 1.5 3.1 3.6 | 20.2
>= 0.50 | 0.5 0.2 0.2 0.2 1.0 0.4 0.1 0.2 0.2 0.4 0.7 1.3 | 5.5
>= 1.00 | 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.1 0.0 0.0 0.2 0.1 | 0.6
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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| 8.5 8.2 10.0 9.3 9.2 9.1 8.4 8.0 7.7 8.1 8.1 8.1 | 8.5
Daily Avg Max 2-Min | 17.3 16.6 20.1 19.7 19.8 19.0 18.2 17.9 16.7 17.2 16.8 17.1 | 18.0
Daily Avg Peak Gust | 20.5 19.6 24.1 23.9 24.1 23.3 23.0 22.5 20.6 20.7 20.3 20.1 | 21.9
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Maximum Daily Avg | 25.0 29.6 23.9 26.7 20.4 19.6 20.7 15.9 20.8 23.1 30.3 27.5 | 30.3
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Maximum 2-Minute Avg| 48 44 46 46 44 62 41 46 38 46 52 69 | 69
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Date of Max 2min-Day| 06 02 14 20 31 21 10 02 25 28 13 12 |
-Year| 2007 1999 2000 1997 1997 2005 1998 2004 1999 2003 2006 1996 |
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Maximum Peak Gust | 55 53 55 54 48 77 53 54 47 53 63 69 | 77
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Date of Max Gust-Day| 06 02 16 04 31 21 13 02 25 28 19 12 |
-Year| 2007 1999 2005 2000 1997 2005 2007 2004 1999 2003 2003 1996 |
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Avg Number of Days: | |
Peak Gust >=30 | 5.4 4.2 7.8 6.9 6.5 5.5 4.6 4.1 3.6 4.8 5.5 5.5 | 64.3
Peak Gust >=40 | 1.9 1.1 1.8 1.0 0.9 0.4 0.5 0.6 0.2 0.6 1.6 1.9 | 12.4
Peak Gust >=50 | 0.3 0.2 0.3 0.2 0.0 0.1 0.2 0.2 0.0 0.1 0.2 0.2 | 2.0
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Max 2-Minute >=30| 3.1 2.4 3.6 2.3 2.6 1.7 0.9 1.1 0.6 1.6 2.6 0.0 | 22.6
Max 2-Minute >=40| 0.5 0.3 0.5 0.3 0.1 0.1 0.2 0.2 0.0 0.2 0.2 0.0 | 2.6
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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.