STATION: HAYWARD EXECUTIVE AIRPORT (KHWD), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Sep 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 | 57.1 59.9 63.3 64.4 68.5 72.0 74.4 74.6 75.2 71.1 63.5 57.9 | 66.8
Avg Min Temp | 42.8 45.1 47.2 48.9 52.8 55.4 57.8 58.3 57.3 53.3 48.1 43.1 | 50.8
Avg Temperature | 50.0 52.5 55.2 56.7 60.6 63.7 66.1 66.5 66.2 62.2 55.8 50.5 | 58.8
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Extremes: | |
Extreme Max Temp| 70 77 87 91 99 104 105 96 98 92 85 74 | 105
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Date of Ext-Day | 06 27 16 26 15 14 22 09 04 14 14 19 |
-Year| 2003 2002 2004 2004 2008 2000 2006 2002 2008 2001 2008 1999 |
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Extreme Min Temp| 28 35 36 36 43 48 53 54 47 43 35 27 | 27
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Date of Ext-Day | 15 10 08 09 01 07 04 07 29 31 23 23 |
-Year| 2007 1999 2002 1999 2008 2008 1999 2002 2007 2002 2003 1998 |
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Heating Degree Days | 467 354 307 257 158 84 33 21 37 111 277 450 | 2554
Cooling Degree Days | 0 0 4 7 22 44 67 67 74 24 1 0 | 309
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.1 0.6 1.2 1.5 1.4 2.6 0.3 0.0 0.0 | 7.7
Max Temp >= 75 | 0.0 0.2 2.6 3.3 5.2 8.4 13.5 14.2 12.3 9.5 1.1 0.0 | 70.4
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
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Min Temp <= 32 | 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 | 1.3
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 | 41.4 43.4 45.0 45.6 49.8 51.9 54.4 55.4 53.5 49.6 46.6 41.4 | 48.2
Avg Wet Bulb Temp | 45.4 47.5 49.8 50.6 54.1 56.2 58.2 59.2 58.2 54.8 51.0 46.0 | 52.6
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Avg Sea Level Pres | 30.18 30.11 30.11 30.07 30.02 29.98 29.98 29.97 29.95 30.03 30.13 30.18 | 30.06
(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 | 0.3 0.9 0.6 0.6 0.7 0.4 2.0 1.1 1.1 1.3 1.0 1.3 | 11.2
Heavy Fog | 1.4 0.9 0.3 0.1 0.0 0.0 0.0 0.1 0.1 0.4 0.9 1.2 | 5.4
Fog | 17.1 12.3 8.1 6.3 3.5 1.7 1.3 3.9 5.4 6.3 11.5 13.5 | 90.8
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 | 2.72 3.41 2.01 1.38 0.47 0.09 0.00 0.02 0.13 0.92 1.47 3.56 | 16.19
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Maximum Daily | 1.96 2.12 0.75 0.86 0.48 0.24 0.00 0.11 0.31 1.48 1.23 1.60 | 2.12
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Date of Ext-Day | 24 13 22 12 08 08 06 01 19 01 29 |
-Year| 2000 2000 2005 2003 2005 2005 1999 2000 2004 2008 2003 |
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Avg Number of Days: | |
>= 0.01 | 12.2 12.2 9.4 7.1 3.1 0.8 0.0 0.6 1.3 3.8 8.8 11.5 | 70.9
>= 0.10 | 6.0 7.8 6.1 4.2 1.3 0.4 0.0 0.1 0.6 2.3 4.0 7.2 | 39.9
>= 0.25 | 3.3 5.1 3.4 2.2 1.0 0.0 0.0 0.0 0.1 1.2 2.0 4.8 | 23.1
>= 0.50 | 1.2 2.2 0.8 0.8 0.0 0.0 0.0 0.0 0.0 0.5 0.8 2.7 | 9.0
>= 1.00 | 0.5 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.2 0.6 | 2.0
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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| 5.5 6.4 7.3 8.7 8.8 8.7 8.2 7.7 6.7 5.7 5.2 5.7 | 7.1
Daily Avg Max 2-Min | 14.1 16.5 18.2 19.8 19.3 18.7 17.0 17.0 16.4 15.4 13.8 14.6 | 16.7
Daily Avg Peak Gust | 17.3 19.9 21.9 24.1 23.1 22.3 20.4 20.2 19.5 18.3 16.8 18.3 | 20.2
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Maximum Daily Avg | 17.0 18.4 15.9 18.3 17.3 16.4 13.0 12.6 15.2 16.0 19.2 19.4 | 19.4
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Maximum 2-Minute Avg| 36 37 37 36 30 33 24 24 28 39 38 37 | 39
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Date of Max 2min-Day| 01 03 07 14 14 06 19 30 19 22 24 14 |
-Year| 2006 2000 2002 2002 1999 2005 2001 1999 2007 2000 2001 2002 |
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Maximum Peak Gust | 43 44 45 49 48 40 36 36 37 54 48 63 | 63
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Date of Max Gust-Day| 01 03 04 29 22 06 22 17 19 22 24 25 |
-Year| 2006 2000 2001 2008 2008 2005 2007 2008 2007 2000 2001 2008 |
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Avg Number of Days: | |
Peak Gust >=30 | 2.3 3.5 3.4 4.4 2.6 1.1 0.3 0.1 0.2 0.8 1.7 3.5 | 23.9
Peak Gust >=40 | 0.3 0.3 0.2 0.4 0.1 0.1 0.0 0.0 0.0 0.2 0.2 0.6 | 2.4
Peak Gust >=50 | 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.1 | 0.2
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Max 2-Minute >=30| 0.5 0.9 0.3 0.7 0.3 0.2 0.0 0.0 0.0 0.2 0.4 0.0 | 3.5
Max 2-Minute >=40| 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.0
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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.