STATION: PASCO-TRI-CITIES AIRPORT (KPSC), WA
CLIMATOLOGICAL SUMMARY. Period of Record: Feb 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 | 42.2 49.8 59.8 66.8 75.7 83.3 93.3 90.7 80.8 65.9 51.0 41.3 | 66.7
Avg Min Temp | 28.4 28.7 33.4 37.6 45.7 51.9 57.1 55.5 46.0 37.7 32.3 27.6 | 40.2
Avg Temperature | 35.3 39.2 46.6 52.2 60.7 67.6 75.2 73.1 63.4 51.8 41.7 34.5 | 53.4
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Extremes: | |
Extreme Max Temp| 67 68 80 94 101 106 113 111 101 88 77 67 | 113
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Date of Ext-Day | 07 17 30 30 23 27 14 04 01 21 13 03 |
-Year| 2002 2007 2003 1998 2001 2006 2001 1998 1998 2003 1999 2007 |
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Extreme Min Temp| -19 5 16 21 28 37 42 40 26 9 11 -6 | -19
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Date of Ext-Day | 04 19 02 01 05 07 05 31 24 31 01 16 |
-Year| 2004 2006 2002 2008 1999 2002 1999 2008 2000 2002 2002 2008 |
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Heating Degree Days | 920 728 571 384 168 34 3 5 97 411 700 946 | 4969
Cooling Degree Days | 0 0 0 1 35 112 319 257 50 1 0 0 | 775
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.1 2.6 6.7 22.3 18.1 4.3 0.0 0.0 0.0 | 54.1
Max Temp >= 75 | 0.0 0.0 0.8 4.8 16.0 25.7 30.7 30.4 23.6 3.8 0.2 0.0 | 136.0
Max Temp <= 32 | 4.1 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.6 5.3 | 10.1
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Min Temp <= 32 | 20.9 19.5 15.3 6.7 1.9 0.0 0.0 0.0 0.5 8.7 16.4 21.9 | 111.9
Min Temp <= 20 | 4.8 3.8 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.6 2.7 5.1 | 17.6
Min Temp <= 0 | 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 | 0.7
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Avg Dew Point Temp | 30.2 31.2 34.3 37.8 44.4 48.4 52.2 51.7 46.4 40.1 34.8 29.8 | 40.1
Avg Wet Bulb Temp | 33.3 35.6 41.1 45.7 52.6 57.3 62.1 60.4 54.0 45.8 38.5 32.7 | 46.6
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Avg Sea Level Pres | 30.18 30.15 30.06 30.01 29.98 29.94 29.91 29.91 29.96 30.08 30.17 30.22 | 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 | 0.5 0.5 0.4 0.5 0.8 0.9 1.0 0.6 0.3 0.1 0.2 0.3 | 6.1
Heavy Fog | 3.6 1.9 0.4 0.2 0.1 0.0 0.1 0.0 0.3 1.1 5.1 3.7 | 16.4
Fog | 18.0 12.2 5.1 4.0 3.7 2.3 1.1 1.5 4.2 9.5 12.5 16.7 | 90.9
Hail | 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.1
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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 | 1.05 0.64 0.54 0.50 0.64 0.68 0.14 0.17 0.31 0.47 0.87 1.11 | 7.13
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Maximum Daily | 0.64 0.55 0.38 0.39 0.49 0.59 0.40 0.21 0.72 0.43 0.82 0.73 | 0.82
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Date of Ext-Day | 27 23 13 03 15 08 07 05 30 01 05 13 |
-Year| 2008 2002 2008 2005 2005 2004 2002 2004 2005 2000 1998 2003 |
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Avg Number of Days: | |
>= 0.01 | 10.6 7.0 6.9 6.6 7.4 4.7 1.5 2.4 2.8 5.3 9.4 11.4 | 76.1
>= 0.10 | 4.0 2.4 2.2 1.8 2.4 2.5 0.5 0.6 1.1 1.6 2.5 3.7 | 25.2
>= 0.25 | 1.2 0.5 0.4 0.4 0.5 1.0 0.2 0.0 0.4 0.5 1.0 1.1 | 7.1
>= 0.50 | 0.1 0.1 0.0 0.0 0.0 0.2 0.0 0.0 0.1 0.0 0.2 0.3 | 0.9
>= 1.00 | 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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WIND (MPH) | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
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Daily Avg Wind Speed| 6.4 6.3 7.5 7.2 7.5 7.6 6.3 6.0 5.3 5.7 5.9 5.9 | 6.5
Daily Avg Max 2-Min | 16.4 16.4 19.1 18.5 19.2 18.4 17.1 15.9 14.5 15.1 16.1 15.9 | 16.9
Daily Avg Peak Gust | 19.5 19.6 23.0 22.6 23.6 22.6 20.9 19.3 17.7 18.4 19.3 19.0 | 20.4
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Maximum Daily Avg | 24.4 23.9 23.7 21.9 17.7 18.7 16.2 16.5 19.9 20.3 20.8 22.7 | 24.4
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Maximum 2-Minute Avg| 48 51 44 40 47 44 60 34 43 44 43 52 | 60
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Date of Max 2min-Day| 12 07 13 27 19 30 07 10 25 28 20 01 |
-Year| 2002 2002 2001 2004 2006 2008 2002 2000 2001 2003 1998 2001 |
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Maximum Peak Gust | 56 60 54 49 61 59 76 44 51 54 52 60 | 76
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Date of Max Gust-Day| 12 07 13 27 19 30 07 10 25 28 20 01 |
-Year| 2002 2002 2001 2004 2006 2008 2002 2000 2001 2003 1998 2001 |
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Avg Number of Days: | |
Peak Gust >=30 | 6.5 4.8 8.2 6.3 7.0 5.2 3.4 3.2 2.4 3.5 5.7 5.6 | 61.6
Peak Gust >=40 | 1.5 1.6 1.8 0.9 0.8 0.7 0.7 0.3 0.4 0.8 1.7 2.1 | 13.3
Peak Gust >=50 | 0.5 0.4 0.1 0.0 0.1 0.1 0.3 0.0 0.1 0.1 0.3 0.3 | 2.2
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Max 2-Minute >=30| 3.1 2.7 3.7 1.9 1.6 1.5 1.0 0.6 0.6 1.6 2.7 0.0 | 20.9
Max 2-Minute >=40| 0.4 0.5 0.2 0.1 0.2 0.2 0.3 0.0 0.1 0.2 0.3 0.0 | 2.3
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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.