STATION: MODESTO CTY-CO H SHAM FD APT (KMOD), CA
CLIMATOLOGICAL SUMMARY. Period of Record: May 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 | 54.6 61.1 68.0 72.8 82.5 90.2 95.0 93.4 88.3 77.9 64.7 55.7 | 75.4
Avg Min Temp | 38.4 41.3 44.8 47.7 54.1 59.6 63.5 62.1 58.4 50.6 43.5 38.4 | 50.2
Avg Temperature | 46.5 51.2 56.4 60.2 68.3 74.9 79.2 77.8 73.4 64.3 54.1 47.1 | 62.8
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Extremes: | |
Extreme Max Temp| 67 78 87 98 105 107 113 108 105 99 82 70 | 113
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Date of Ext-Day | 17 07 16 27 31 21 23 04 01 01 07 08 |
-Year| 1999 2006 2007 2004 2001 2001 2006 1998 2007 2001 2006 2006 |
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Extreme Min Temp| 23 29 33 32 43 49 52 53 45 39 27 20 | 20
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Date of Ext-Day | 14 11 15 09 12 03 04 20 30 31 23 24 |
-Year| 2007 1999 2002 1999 1998 1999 1999 2000 2007 1998 2003 1998 |
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Heating Degree Days | 574 390 269 169 44 3 0 0 4 74 327 556 | 2409
Cooling Degree Days | 0 0 3 26 146 300 442 395 254 51 1 0 | 1618
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 1.2 7.5 16.6 25.3 22.9 13.7 1.3 0.0 0.0 | 88.5
Max Temp >= 75 | 0.0 0.7 6.4 12.9 25.0 29.0 31.0 30.8 29.0 21.9 2.2 0.0 | 188.9
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 | 6.9 1.6 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.8 | 16.6
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 0.1 | 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 | 40.2 41.9 43.4 42.5 45.6 48.9 53.0 52.4 50.3 45.9 44.5 39.8 | 45.7
Avg Wet Bulb Temp | 43.3 46.6 49.7 51.1 55.9 60.0 63.4 62.3 60.0 53.9 48.8 43.4 | 53.2
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Avg Sea Level Pres | 30.16 30.09 30.06 30.01 29.93 29.88 29.87 29.87 29.87 29.97 30.10 30.16 | 30.00
(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 | 1.1 1.3 0.6 0.7 0.3 0.4 0.3 0.4 0.5 1.0 1.4 1.5 | 9.4
Heavy Fog | 11.3 4.8 2.3 0.2 0.0 0.0 0.0 0.0 0.0 0.1 6.5 9.4 | 34.6
Fog | 25.9 21.2 15.1 7.9 2.8 0.9 0.6 1.4 3.5 11.9 21.5 23.7 | 136.5
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 2.06 1.31 1.06 0.68 0.04 0.02 0.01 0.08 0.57 1.01 2.21 | 11.42
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Maximum Daily | 1.70 1.10 0.96 1.63 1.93 0.14 0.19 0.10 0.28 1.36 1.14 0.99 | 1.93
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Date of Ext-Day | 02 15 04 17 12 06 20 21 20 24 08 28 |
-Year| 2006 2005 2001 2000 1998 1998 2006 2003 2005 1998 2002 2001 |
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Avg Number of Days: | |
>= 0.01 | 11.4 11.1 7.9 5.4 3.1 0.7 0.2 0.1 0.8 3.1 10.8 10.9 | 65.5
>= 0.10 | 5.1 5.7 4.1 2.7 1.3 0.2 0.1 0.1 0.4 1.3 2.5 5.9 | 29.4
>= 0.25 | 3.2 2.7 1.8 1.5 0.5 0.0 0.0 0.0 0.1 0.7 1.5 3.5 | 15.5
>= 0.50 | 1.5 1.1 0.6 0.6 0.5 0.0 0.0 0.0 0.0 0.4 0.3 1.4 | 6.3
>= 1.00 | 0.4 0.1 0.0 0.1 0.2 0.0 0.0 0.0 0.0 0.1 0.1 0.0 | 1.0
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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| 4.8 5.5 6.7 7.6 8.7 9.0 8.2 7.7 6.5 5.4 4.6 5.1 | 6.7
Daily Avg Max 2-Min | 13.0 14.8 16.1 17.8 18.4 18.2 16.2 15.4 14.6 13.7 12.8 13.7 | 15.4
Daily Avg Peak Gust | 15.9 18.4 20.2 22.2 22.8 22.5 19.7 18.8 18.0 17.1 15.9 17.2 | 19.1
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Maximum Daily Avg | 15.6 17.1 19.1 18.2 20.6 19.0 12.9 12.7 15.0 17.3 15.9 15.9 | 20.6
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Maximum 2-Minute Avg| 32 32 36 33 35 30 25 25 28 31 32 45 | 45
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Date of Max 2min-Day| 07 14 13 03 22 08 07 03 17 19 24 03 |
-Year| 2005 2008 2002 1999 2008 2002 2002 2001 2004 2004 2001 2008 |
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Maximum Peak Gust | 45 43 44 43 45 37 46 30 32 43 43 68 | 68
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Date of Max Gust-Day| 07 14 13 15 21 10 14 25 17 19 24 03 |
-Year| 2005 2008 2002 2007 2008 2008 2007 2008 2004 2004 2001 2008 |
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Avg Number of Days: | |
Peak Gust >=30 | 1.6 2.8 2.4 3.3 1.6 2.2 0.1 0.1 0.5 1.1 1.4 2.4 | 19.6
Peak Gust >=40 | 0.1 0.4 0.2 0.4 0.3 0.0 0.1 0.0 0.0 0.1 0.2 0.4 | 2.1
Peak Gust >=50 | 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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Max 2-Minute >=30| 0.2 0.2 0.5 0.8 0.3 0.2 0.0 0.0 0.0 0.1 0.2 0.0 | 2.5
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.