STATION: LIVERMORE MUNICIPAL ARPT (KLVK), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Apr 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 | 56.4 60.0 65.3 68.1 75.2 82.0 87.2 87.4 84.4 76.3 64.9 57.5 | 72.1
Avg Min Temp | 37.2 39.2 41.3 43.8 49.1 53.3 56.7 56.8 54.5 48.6 42.4 37.5 | 46.7
Avg Temperature | 46.8 49.6 53.3 56.0 62.2 67.7 72.0 72.1 69.4 62.5 53.6 47.5 | 59.4
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Extremes: | |
Extreme Max Temp| 68 75 84 93 104 107 109 109 104 98 82 70 | 109
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Date of Ext-Day | 15 22 18 26 31 14 10 03 02 01 04 21 |
-Year| 2000 2002 2004 2004 2001 2000 2002 1998 1998 2001 2001 1999 |
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Extreme Min Temp| 20 23 28 31 37 44 48 48 42 34 26 21 | 20
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Date of Ext-Day | 14 08 08 09 09 09 02 07 30 31 30 24 |
-Year| 2007 2003 2002 1999 2003 1999 2003 2002 2007 2002 2004 1998 |
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Heating Degree Days | 565 436 362 277 132 32 6 3 20 109 341 542 | 2825
Cooling Degree Days | 0 0 1 6 45 113 221 222 153 31 0 0 | 792
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.4 3.4 7.0 12.1 13.3 9.7 2.3 0.0 0.0 | 48.2
Max Temp >= 75 | 0.0 0.3 4.1 6.9 14.9 22.4 28.2 28.9 24.4 17.2 3.0 0.0 | 150.3
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 | 7.8 3.3 1.5 0.4 0.0 0.0 0.0 0.0 0.0 0.0 1.9 7.8 | 22.7
Min Temp <= 20 | 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.1
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 | 39.5 41.0 42.7 43.4 47.1 49.6 53.1 52.4 49.3 44.4 42.7 38.8 | 45.3
Avg Wet Bulb Temp | 43.2 45.4 47.9 49.3 53.5 56.8 60.0 59.6 57.4 52.2 47.8 43.4 | 51.4
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Avg Sea Level Pres | 30.15 30.08 30.07 30.03 29.97 29.92 29.92 29.91 29.89 29.99 30.10 30.15 | 30.02
(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 | 1.3 0.9 0.5 0.6 0.2 0.4 0.9 1.6 0.6 0.9 1.0 0.8 | 9.8
Heavy Fog | 5.1 2.2 0.9 0.1 0.0 0.0 0.0 0.0 0.0 0.4 3.0 3.5 | 15.3
Fog | 19.9 16.8 11.6 7.5 6.1 2.4 4.1 4.7 5.7 7.4 15.1 17.6 | 118.9
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 | 2.36 2.88 1.62 1.18 0.67 0.04 0.00 0.01 0.09 0.77 1.57 3.07 | 14.25
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Maximum Daily | 2.32 1.15 0.78 1.14 0.72 0.14 0.01 0.06 0.23 1.39 1.66 2.76 | 2.76
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Date of Ext-Day | 04 22 22 12 02 07 21 25 22 19 08 16 |
-Year| 2008 2000 2005 2003 2003 2000 2005 2003 2007 2004 2002 2002 |
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Avg Number of Days: | |
>= 0.01 | 14.3 14.2 10.5 6.9 3.5 0.7 0.1 0.2 1.0 4.0 10.6 12.1 | 78.2
>= 0.10 | 5.0 7.7 5.4 3.2 2.0 0.2 0.0 0.0 0.4 1.7 3.6 6.5 | 35.7
>= 0.25 | 2.8 4.3 2.4 1.8 1.1 0.0 0.0 0.0 0.0 0.9 2.0 3.6 | 19.0
>= 0.50 | 1.2 1.8 0.7 0.5 0.3 0.0 0.0 0.0 0.0 0.5 0.9 2.0 | 7.8
>= 1.00 | 0.3 0.4 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.5 | 1.7
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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| 4.9 5.2 5.7 7.0 8.1 8.8 8.8 8.0 6.5 5.3 4.3 4.9 | 6.5
Daily Avg Max 2-Min | 15.3 16.1 16.8 18.1 18.6 19.6 18.9 18.2 17.0 15.8 14.3 15.7 | 17.0
Daily Avg Peak Gust | 18.7 19.7 20.2 21.9 22.1 23.2 22.0 21.3 20.1 19.2 17.4 19.3 | 20.4
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Maximum Daily Avg | 15.8 15.0 16.8 15.1 16.3 15.4 14.3 13.7 14.7 18.6 14.6 18.0 | 18.6
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Maximum 2-Minute Avg| 33 33 35 33 32 30 25 26 28 32 45 36 | 45
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Date of Max 2min-Day| 07 22 26 17 02 02 15 20 19 22 24 16 |
-Year| 2005 2002 2007 2007 2001 1999 2001 2001 2007 2000 2001 2002 |
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Maximum Peak Gust | 52 46 41 40 43 36 30 30 33 46 52 47 | 52
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Date of Max Gust-Day| 04 25 26 17 02 02 15 25 19 22 24 16 |
-Year| 2008 2004 2007 2007 2001 1999 2001 1998 2007 2000 2001 2002 |
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Avg Number of Days: | |
Peak Gust >=30 | 2.2 2.7 2.6 2.5 1.4 0.6 0.3 0.5 0.3 0.8 0.9 2.8 | 17.6
Peak Gust >=40 | 0.5 0.5 0.1 0.1 0.3 0.0 0.0 0.0 0.0 0.3 0.1 0.5 | 2.3
Peak Gust >=50 | 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 | 0.2
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Max 2-Minute >=30| 0.4 0.8 0.4 0.5 0.2 0.1 0.0 0.0 0.0 0.2 0.2 0.0 | 2.7
Max 2-Minute >=40| 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 | 0.1
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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.