STATION: SPOKANE FELTS FIELD AIRPORT (KSFF), WA
CLIMATOLOGICAL SUMMARY. Period of Record: Oct 1998 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 | 36.9 42.2 50.7 58.6 67.9 75.2 86.9 85.1 74.5 59.9 45.0 36.5 | 59.9
Avg Min Temp | 26.2 26.6 31.3 35.8 42.8 49.7 55.6 53.9 45.6 36.6 30.7 25.4 | 38.3
Avg Temperature | 31.6 34.4 41.0 47.2 55.3 62.4 71.2 69.5 60.0 48.2 37.8 30.9 | 49.1
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Extremes: | |
Extreme Max Temp| 59 60 72 80 94 99 104 104 97 86 69 60 | 104
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Date of Ext-Day | 26 27 20 27 17 29 23 17 03 01 12 27 |
-Year| 2003 2005 1999 2001 2006 2008 2006 2008 2003 2008 1999 2008 |
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Extreme Min Temp| -10 6 17 24 28 37 39 40 26 12 5 -10 | -10
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Date of Ext-Day | 05 17 07 04 09 07 04 28 23 31 22 23 |
-Year| 2004 2006 2002 2001 1999 2002 1999 2000 2000 2002 2003 2008 |
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Heating Degree Days | 1037 863 744 534 310 126 17 22 174 520 816 1056 | 6219
Cooling Degree Days | 0 0 0 0 11 49 210 161 25 0 0 0 | 455
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 0.8 2.1 12.8 9.9 1.6 0.0 0.0 0.0 | 27.2
Max Temp >= 75 | 0.0 0.0 0.0 1.4 6.7 15.4 28.6 26.8 14.9 1.5 0.0 0.0 | 95.3
Max Temp <= 32 | 8.1 1.7 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1 7.7 | 20.0
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Min Temp <= 32 | 25.2 22.6 19.3 8.4 2.6 0.0 0.0 0.0 0.5 9.6 17.8 25.8 | 131.9
Min Temp <= 20 | 5.8 4.8 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.5 2.9 7.3 | 22.2
Min Temp <= 0 | 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 | 1.0
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Avg Dew Point Temp | 27.4 27.3 30.6 33.6 39.5 44.9 46.7 45.7 41.2 36.7 32.1 26.6 | 36.0
Avg Wet Bulb Temp | 30.1 31.5 36.5 41.1 47.6 53.1 57.7 56.4 50.1 42.6 35.4 29.4 | 42.6
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Avg Sea Level Pres | 30.16 30.13 30.07 30.01 29.98 29.94 29.93 29.93 29.99 30.09 30.16 30.20 | 30.05
(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 0.1 0.7 1.6 2.3 2.1 1.7 2.3 0.6 0.3 0.2 0.4 | 12.5
Heavy Fog | 5.6 2.9 1.7 0.8 0.1 0.1 0.0 0.1 0.3 4.1 3.7 3.7 | 23.1
Fog | 22.0 16.3 11.2 8.1 6.6 4.5 1.6 1.9 5.3 14.5 17.3 20.0 | 129.2
Hail | 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.2
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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 | 2.04 1.18 1.40 1.15 1.72 1.31 0.38 0.46 0.62 0.85 2.06 2.53 | 15.69
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Maximum Daily | 0.87 0.64 0.86 1.14 1.67 1.16 0.81 0.59 0.65 0.65 0.67 0.87 | 1.67
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Date of Ext-Day | 10 27 27 13 21 10 09 06 30 30 20 03 |
-Year| 2006 1999 2005 2000 2004 2006 2005 2004 2005 2001 1998 2007 |
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Avg Number of Days: | |
>= 0.01 | 16.2 11.0 12.1 10.8 10.4 8.8 3.1 3.9 5.0 9.2 14.1 15.8 | 120.3
>= 0.10 | 7.4 4.4 5.8 3.3 5.1 4.3 1.2 1.5 2.1 2.5 7.5 8.5 | 53.6
>= 0.25 | 2.4 1.3 1.2 1.0 1.9 1.5 0.5 0.4 0.6 0.9 2.6 3.3 | 17.7
>= 0.50 | 0.4 0.2 0.2 0.3 0.9 0.6 0.2 0.2 0.4 0.2 0.5 1.2 | 5.3
>= 1.00 | 0.0 0.0 0.0 0.2 0.1 0.1 0.0 0.0 0.0 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| 4.2 4.3 5.8 5.9 5.9 5.8 5.4 4.8 4.3 4.2 4.2 4.0 | 4.9
Daily Avg Max 2-Min | 13.2 13.7 16.9 17.1 17.5 16.7 16.1 15.4 13.8 13.5 13.5 13.3 | 15.1
Daily Avg Peak Gust | 16.4 16.9 21.1 21.6 22.1 21.3 20.9 19.8 17.8 16.7 16.9 16.5 | 19.0
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Maximum Daily Avg | 18.5 19.1 17.9 18.9 14.7 13.4 14.9 12.6 13.7 15.6 21.9 20.7 | 21.9
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Maximum 2-Minute Avg| 40 45 40 36 44 44 35 39 31 37 40 43 | 45
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Date of Max 2min-Day| 09 02 18 04 12 21 13 02 25 28 19 15 |
-Year| 2000 1999 2004 2000 2007 2005 2002 2004 1999 2003 2003 2006 |
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Maximum Peak Gust | 55 53 56 46 55 48 45 46 40 45 53 54 | 56
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Date of Max Gust-Day| 11 02 18 04 19 21 13 18 06 31 19 15 |
-Year| 2006 1999 2004 2000 2006 2005 2007 2008 2003 1999 2003 2006 |
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Avg Number of Days: | |
Peak Gust >=30 | 3.5 3.1 4.6 3.9 4.9 3.0 2.8 2.8 1.8 2.1 3.6 3.8 | 40.0
Peak Gust >=40 | 1.0 0.9 1.1 0.4 0.4 0.4 0.6 0.3 0.1 0.3 0.8 0.9 | 7.3
Peak Gust >=50 | 0.3 0.2 0.1 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.2 0.2 | 1.2
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Max 2-Minute >=30| 1.7 0.9 1.4 1.0 0.8 0.5 0.8 0.4 0.1 0.5 0.9 0.0 | 9.0
Max 2-Minute >=40| 0.2 0.1 0.1 0.0 0.2 0.1 0.0 0.0 0.0 0.0 0.1 0.0 | 0.8
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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.