STATION: SAN DIEGO-BROWN FIELD MUNICIPAL ARPT (KSDM), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Feb 1997 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 | 66.3 65.6 67.0 68.8 72.0 74.4 78.4 79.9 79.2 75.9 71.0 66.5 | 72.1
Avg Min Temp | 43.7 44.8 46.8 49.0 54.3 57.8 61.3 62.2 60.2 55.1 48.5 43.1 | 52.2
Avg Temperature | 55.0 55.2 56.9 58.9 63.1 66.1 69.9 71.1 69.7 65.5 59.8 54.8 | 62.2
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Extremes: | |
Extreme Max Temp| 90 93 97 97 101 103 110 104 104 99 95 87 | 110
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Date of Ext-Day | 06 22 20 27 03 27 22 01 24 16 02 21 |
-Year| 2006 2002 1997 2008 2004 2006 2006 1997 1997 1997 1997 2005 |
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Extreme Min Temp| 27 32 35 34 41 44 54 53 50 45 32 32 | 27
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Date of Ext-Day | 14 01 01 10 01 05 06 08 20 30 30 07 |
-Year| 2007 2002 1997 1999 1999 1999 2000 2002 1999 2004 2004 1998 |
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Heating Degree Days | 315 280 256 193 84 24 0 0 4 50 177 316 | 1700
Cooling Degree Days | 5 3 5 10 26 57 151 187 144 65 20 1 | 674
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Avg Number of Days: | |
Max Temp >= 90 | 0.1 0.2 0.4 0.5 0.6 0.8 0.7 1.6 2.3 2.2 0.9 0.0 | 10.2
Max Temp >= 75 | 5.2 3.5 4.0 5.0 8.2 13.1 25.3 28.9 23.2 13.8 7.5 4.6 | 142.4
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
| |
Min Temp <= 32 | 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.3 | 1.1
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 | 40.5 42.4 45.8 47.7 52.7 56.1 60.1 61.0 58.5 50.5 44.7 38.0 | 49.8
Avg Wet Bulb Temp | 48.1 49.0 51.1 52.7 56.8 59.6 63.2 64.2 62.5 57.0 52.2 47.1 | 55.3
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Avg Sea Level Pres | 30.09 30.06 30.02 30.00 29.95 29.91 29.92 29.91 29.88 29.95 30.03 30.09 | 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 | 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 | 0.2
Heavy Fog | 4.1 2.6 4.3 2.8 3.1 3.0 3.7 4.4 5.4 3.8 4.5 3.6 | 45.2
Fog | 16.3 17.7 19.9 17.0 16.8 17.6 20.0 19.1 17.6 16.2 17.2 15.3 | 210.7
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 | 1.54 2.74 1.08 0.94 0.20 0.06 0.05 0.03 0.17 0.62 0.73 1.18 | 9.35
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Maximum Daily | 1.15 2.36 0.91 1.31 0.58 0.08 0.10 0.09 1.04 1.56 1.27 1.70 | 2.36
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Date of Ext-Day | 11 22 15 14 22 25 31 09 25 27 26 17 |
-Year| 2001 2004 2003 2003 2006 2000 2006 1998 1997 2004 2008 2008 |
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Avg Number of Days: | |
>= 0.01 | 8.7 10.3 9.0 7.1 3.5 2.5 2.2 1.5 2.8 4.4 7.2 7.0 | 66.2
>= 0.10 | 3.3 5.0 3.1 2.4 0.7 0.0 0.1 0.0 0.3 1.3 1.5 2.4 | 20.0
>= 0.25 | 2.1 3.1 1.3 1.2 0.2 0.0 0.0 0.0 0.2 0.8 1.0 1.4 | 11.1
>= 0.50 | 0.9 1.8 0.8 0.3 0.2 0.0 0.0 0.0 0.1 0.4 0.2 0.5 | 5.3
>= 1.00 | 0.2 0.5 0.0 0.1 0.0 0.0 0.0 0.0 0.1 0.2 0.1 0.3 | 1.4
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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| 5.7 6.4 5.8 6.1 5.7 5.3 4.9 4.7 4.6 4.9 5.2 5.8 | 5.4
Daily Avg Max 2-Min | 14.2 15.7 14.8 15.4 14.6 14.1 13.6 13.6 13.7 13.9 14.1 14.5 | 14.3
Daily Avg Peak Gust | 17.2 19.1 18.4 19.5 18.4 18.0 17.1 16.9 17.1 17.3 17.4 17.7 | 17.8
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Maximum Daily Avg | 19.5 18.6 14.1 13.3 11.4 10.3 8.3 7.4 10.5 11.5 13.6 19.1 | 19.5
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Maximum 2-Minute Avg| 37 37 32 29 25 30 21 22 29 28 71 45 | 71
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Date of Max 2min-Day| 07 13 05 14 22 27 22 02 24 20 25 29 |
-Year| 2003 2001 2000 2003 2008 2006 2006 2000 1997 2004 1997 2004 |
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Maximum Peak Gust | 44 45 39 37 31 41 24 25 36 36 87 52 | 87
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Date of Max Gust-Day| 27 13 05 14 22 27 22 02 24 20 25 29 |
-Year| 2008 2001 2000 2003 2008 2006 2006 2000 1997 2004 1997 2004 |
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Avg Number of Days: | |
Peak Gust >=30 | 1.2 1.6 1.0 0.7 0.1 0.2 0.0 0.0 0.2 0.8 1.9 2.0 | 9.5
Peak Gust >=40 | 0.3 0.3 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.6 0.4 | 1.6
Peak Gust >=50 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 | 0.3
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Max 2-Minute >=30| 0.4 0.3 0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.3 0.0 | 1.1
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.