STATION: CONCORD BUCHANAN FIELD AIRPORT (KCCR), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Jun 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 | 56.3 60.8 67.1 69.4 78.3 84.3 87.5 86.9 84.0 76.4 64.9 57.1 | 72.8
Avg Min Temp | 39.8 42.6 45.5 47.4 52.7 56.0 58.0 58.0 55.6 50.9 44.6 40.2 | 49.3
Avg Temperature | 48.0 51.7 56.3 58.4 65.5 70.2 72.7 72.5 69.8 63.6 54.8 48.6 | 61.0
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Extremes: | |
Extreme Max Temp| 72 76 85 94 105 109 109 105 103 99 80 74 | 109
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Date of Ext-Day | 13 16 15 26 31 14 24 28 18 01 04 19 |
-Year| 2007 2007 2004 2004 2001 2000 2006 2008 2000 2001 2001 1999 |
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Extreme Min Temp| 24 32 33 36 43 48 49 51 45 41 29 27 | 24
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Date of Ext-Day | 13 13 08 24 11 07 18 20 29 31 30 19 |
-Year| 2007 2001 2002 2008 2000 1999 1999 2002 2007 2002 2004 2006 |
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Heating Degree Days | 525 377 275 211 63 9 2 2 12 85 307 507 | 2375
Cooling Degree Days | 0 0 4 13 78 163 242 234 157 42 0 0 | 933
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.3 3.7 8.6 13.6 11.5 8.7 1.6 0.0 0.0 | 48.0
Max Temp >= 75 | 0.0 0.1 5.6 7.3 19.3 26.1 28.5 28.9 25.4 17.6 2.5 0.0 | 161.3
Max Temp <= 32 | 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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Min Temp <= 32 | 4.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 2.9 | 7.9
Min Temp <= 20 | 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
Min Temp <= 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 | 0.0
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Avg Dew Point Temp | 41.1 42.4 43.7 44.1 47.5 49.5 52.4 53.0 50.4 45.4 44.7 41.3 | 46.3
Avg Wet Bulb Temp | 44.7 46.7 49.6 50.7 55.1 57.9 59.7 60.2 58.2 52.8 49.4 45.0 | 52.5
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Avg Sea Level Pres | 30.13 30.04 30.03 29.99 29.92 29.88 29.88 29.87 29.86 29.96 30.07 30.11 | 29.98
(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 0.3 0.2 0.6 0.2 0.2 0.3 0.2 0.3 0.2 0.9 | 3.8
Heavy Fog | 5.5 1.0 0.2 0.1 0.1 0.0 0.0 0.0 0.0 0.1 2.3 3.7 | 13.0
Fog | 23.9 16.7 10.1 5.7 3.5 1.0 0.6 1.8 3.6 6.0 15.9 21.6 | 110.4
Hail | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 | 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 | 2.61 3.06 1.46 1.13 0.48 0.04 0.00 0.02 0.05 0.66 1.49 3.82 | 14.82
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Maximum Daily | 2.88 1.61 0.60 0.94 0.56 0.14 0.01 0.19 0.15 1.09 1.32 2.24 | 2.88
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Date of Ext-Day | 04 25 06 12 19 25 18 21 24 26 01 31 |
-Year| 2008 2004 2002 2003 2002 2001 2007 2003 2001 2004 2008 2005 |
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Avg Number of Days: | |
>= 0.01 | 11.7 11.2 8.4 5.6 2.6 0.7 0.1 0.1 0.8 4.1 9.9 12.5 | 67.6
>= 0.10 | 4.8 6.6 4.3 2.9 1.4 0.1 0.0 0.1 0.2 1.3 3.0 7.5 | 32.3
>= 0.25 | 2.8 4.3 2.5 1.9 0.8 0.0 0.0 0.0 0.0 0.7 2.1 4.6 | 19.6
>= 0.50 | 1.0 1.8 0.6 0.7 0.3 0.0 0.0 0.0 0.0 0.4 0.8 2.1 | 7.6
>= 1.00 | 0.4 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.3 0.9 | 2.3
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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| 5.0 5.7 6.9 8.3 9.3 10.6 10.6 9.6 7.3 5.8 4.7 5.1 | 7.4
Daily Avg Max 2-Min | 14.1 15.5 16.9 18.2 18.5 19.6 19.2 18.4 16.5 15.2 13.6 14.8 | 16.7
Daily Avg Peak Gust | 17.4 19.1 20.7 22.2 22.7 23.7 23.2 22.2 20.2 18.9 17.0 18.4 | 20.5
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Maximum Daily Avg | 17.1 16.9 16.4 16.6 18.0 20.0 20.4 19.7 17.4 18.1 17.9 19.5 | 20.4
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Maximum 2-Minute Avg| 37 36 31 31 31 30 29 32 29 69 40 40 | 69
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Date of Max 2min-Day| 04 17 25 17 02 01 15 20 08 30 07 14 |
-Year| 2008 2004 2006 2007 2001 2002 2001 2001 1999 2008 2002 2003 |
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Maximum Peak Gust | 47 41 40 37 38 36 35 37 34 82 52 49 | 82
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Date of Max Gust-Day| 04 17 04 15 02 20 15 20 08 30 07 14 |
-Year| 2008 2004 2001 2002 2001 2002 2001 2001 1999 2008 2002 2002 |
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Avg Number of Days: | |
Peak Gust >=30 | 2.1 3.0 2.9 2.6 2.8 2.2 2.6 1.2 0.5 1.2 1.1 3.3 | 25.5
Peak Gust >=40 | 0.3 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.2 0.7 | 1.9
Peak Gust >=50 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 | 0.2
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Max 2-Minute >=30| 0.4 0.4 0.3 0.2 0.1 0.2 0.0 0.1 0.0 0.3 0.2 0.0 | 2.4
Max 2-Minute >=40| 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 | 0.2
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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.