STATION: ONTARIO INTERNATIONAL ARPT (KONT), 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 | 66.3 66.2 70.5 72.7 79.6 85.6 92.8 93.5 89.2 80.7 72.8 66.2 | 78.0
Avg Min Temp | 43.4 44.7 47.4 49.6 55.2 59.0 64.0 64.2 61.1 55.4 48.4 42.6 | 52.9
Avg Temperature | 54.9 55.5 58.9 61.1 67.4 72.3 78.4 78.8 75.1 68.0 60.6 54.4 | 65.5
| |
Extremes: | |
Extreme Max Temp| 90 89 94 101 103 108 114 109 110 101 94 86 | 114
| |
Date of Ext-Day | 31 22 11 26 28 20 22 30 01 20 07 24 |
-Year| 2003 2002 2007 2004 2003 2008 2006 1998 2002 2003 2006 2005 |
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Extreme Min Temp| 25 31 33 33 42 46 56 56 52 44 32 28 | 25
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Date of Ext-Day | 14 03 12 10 01 05 12 08 28 18 30 22 |
-Year| 2007 2002 2006 1999 1999 1999 2001 1999 1998 1998 2004 1998 |
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Heating Degree Days | 317 273 205 152 38 9 0 0 2 38 157 331 | 1522
Cooling Degree Days | 3 4 17 36 113 227 413 427 302 131 25 2 | 1701
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Avg Number of Days: | |
Max Temp >= 90 | 0.1 0.0 0.9 2.0 4.8 11.3 21.8 23.4 15.5 7.4 0.9 0.0 | 88.2
Max Temp >= 75 | 6.6 5.6 10.2 12.0 21.1 26.2 31.0 30.9 27.9 21.1 12.6 6.3 | 211.5
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 | 0.5 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.8 | 1.6
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 0.0 | 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 | 36.5 39.5 42.9 45.1 51.2 55.3 58.7 57.5 54.5 47.7 41.6 34.9 | 47.1
Avg Wet Bulb Temp | 46.5 47.8 50.6 52.4 57.6 61.4 65.4 65.0 62.1 56.6 51.0 45.8 | 55.2
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Avg Sea Level Pres | 30.09 30.05 30.00 29.97 29.90 29.87 29.87 29.86 29.85 29.92 30.03 30.09 | 29.96
(Inches of Mercury) | |
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WEATHER | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Year
See disclaimer below| |
| |
Avg Number of Days: | |
Thunderstorms | 0.2 0.8 0.8 0.4 0.3 0.0 0.5 0.2 0.3 0.3 0.3 0.2 | 4.1
Heavy Fog | 1.7 0.8 1.8 0.4 0.4 0.2 0.2 0.1 0.7 1.4 1.0 1.2 | 9.8
Fog | 13.7 13.8 17.3 14.6 16.6 18.0 13.9 12.2 12.6 16.2 14.0 10.9 | 173.8
Hail | 0.0 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.2
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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 | 2.17 3.50 1.19 1.12 0.19 0.02 0.01 0.04 0.07 0.55 0.78 1.27 | 10.92
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Maximum Daily | 3.23 2.94 2.53 1.22 0.43 0.24 0.03 0.30 0.29 1.37 1.61 1.70 | 3.23
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Date of Ext-Day | 09 12 15 04 22 02 05 15 20 27 30 15 |
-Year| 2005 2001 2003 2006 2006 1999 2001 2005 2005 2004 2007 2008 |
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Avg Number of Days: | |
>= 0.01 | 5.1 6.9 4.9 4.2 1.0 0.4 0.5 0.4 0.7 1.9 3.5 5.2 | 34.6
>= 0.10 | 3.5 5.4 2.5 2.2 0.6 0.1 0.0 0.2 0.3 0.7 1.5 2.5 | 19.5
>= 0.25 | 2.2 3.9 1.2 1.4 0.3 0.0 0.0 0.1 0.1 0.6 1.0 1.5 | 12.4
>= 0.50 | 1.4 2.5 0.6 1.0 0.0 0.0 0.0 0.0 0.0 0.5 0.4 0.7 | 7.0
>= 1.00 | 0.7 1.0 0.2 0.2 0.0 0.0 0.0 0.0 0.0 0.2 0.3 0.4 | 2.9
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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 5.5 6.3 6.7 7.1 7.0 6.8 6.4 5.8 5.4 4.9 5.1 | 6.0
Daily Avg Max 2-Min | 16.6 15.9 17.7 17.6 17.7 17.4 17.6 17.5 16.6 15.9 14.8 14.9 | 16.7
Daily Avg Peak Gust | 20.7 19.8 22.1 22.1 22.4 22.0 22.3 22.1 20.9 19.8 18.3 18.9 | 20.9
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Maximum Daily Avg | 34.0 23.0 29.9 14.8 16.1 10.3 9.8 9.0 20.1 26.6 24.3 36.8 | 36.8
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Maximum 2-Minute Avg| 68 41 51 31 36 28 30 36 32 48 43 60 | 68
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Date of Max 2min-Day| 06 09 21 01 03 27 17 31 21 22 26 09 |
-Year| 2003 2002 2000 2000 2001 2006 2003 1998 2004 2007 2002 1998 |
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Maximum Peak Gust | 90 53 62 44 46 32 35 44 52 66 58 72 | 90
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Date of Max Gust-Day| 06 09 21 05 03 27 17 31 02 22 29 09 |
-Year| 2003 2002 2000 2006 2001 2006 2003 1998 2007 2007 2006 1998 |
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Avg Number of Days: | |
Peak Gust >=30 | 5.4 3.4 3.5 1.7 0.7 0.1 0.4 0.2 0.5 2.4 3.0 4.9 | 26.2
Peak Gust >=40 | 3.5 1.2 1.5 0.2 0.1 0.0 0.0 0.1 0.2 1.0 1.5 1.9 | 11.3
Peak Gust >=50 | 1.5 0.3 0.7 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.5 0.9 | 4.3
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Max 2-Minute >=30| 3.5 1.6 1.8 0.2 0.1 0.0 0.1 0.1 0.2 1.3 1.7 0.0 | 10.7
Max 2-Minute >=40| 1.2 0.2 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.5 0.0 | 2.6
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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.