STATION: ONTARIO MUNICIPAL AIRPORT (KONO), OR
CLIMATOLOGICAL SUMMARY. Period of Record: Jul 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 | 37.1 44.3 56.3 63.9 73.9 83.2 94.2 90.9 80.1 65.1 48.7 37.4 | 64.6
Avg Min Temp | 23.9 25.9 32.3 37.2 46.0 53.1 61.0 56.8 47.2 36.9 29.0 24.1 | 39.4
Avg Temperature | 30.5 35.1 44.3 50.5 59.9 68.2 77.6 73.9 63.6 51.0 38.9 30.7 | 52.0
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Extremes: | |
Extreme Max Temp| 59 59 76 84 100 102 112 105 98 93 74 58 | 112
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Date of Ext-Day | 20 24 18 29 28 26 12 05 03 01 07 04 |
-Year| 2004 1999 2004 2007 2003 2002 2002 1998 1998 1997 2006 2007 |
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Extreme Min Temp| -6 8 13 19 26 36 45 39 27 14 10 -4 | -6
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Date of Ext-Day | 24 05 03 01 08 01 11 31 24 31 01 18 |
-Year| 2008 1999 2002 2008 2002 2000 1997 1999 2000 2006 2006 2005 |
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Heating Degree Days | 1069 845 641 434 196 49 2 5 106 435 784 1063 | 5629
Cooling Degree Days | 0 0 0 0 39 144 392 278 65 2 0 0 | 920
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 2.2 8.1 24.3 19.4 4.4 0.1 0.0 0.0 | 58.4
Max Temp >= 75 | 0.0 0.0 0.3 3.9 14.4 24.4 30.6 30.2 21.7 4.2 0.0 0.0 | 129.7
Max Temp <= 32 | 7.2 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.6 8.3 | 17.5
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Min Temp <= 32 | 27.5 23.0 16.3 7.2 1.1 0.0 0.0 0.0 0.7 9.0 20.5 26.5 | 131.7
Min Temp <= 20 | 9.2 6.5 0.7 0.3 0.0 0.0 0.0 0.0 0.0 0.2 4.1 9.6 | 30.5
Min Temp <= 0 | 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 | 0.8
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Avg Dew Point Temp | 25.2 26.7 30.2 33.0 39.0 43.2 47.6 46.1 40.8 33.8 29.8 25.1 | 35.0
Avg Wet Bulb Temp | 28.4 31.5 38.1 42.5 49.4 54.4 60.2 57.9 51.5 42.4 34.6 28.5 | 43.3
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Avg Sea Level Pres | 30.25 30.18 30.09 30.01 29.97 29.92 29.89 29.91 29.97 30.10 30.20 30.27 | 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 | 0.0 0.1 0.5 0.5 2.1 2.2 1.5 1.1 0.7 0.2 0.0 0.0 | 8.8
Heavy Fog | 5.7 3.0 0.7 0.3 0.2 0.1 0.1 0.0 0.0 0.8 2.8 5.3 | 18.9
Fog | 20.3 13.8 7.4 4.4 5.0 2.0 0.9 1.3 2.3 7.1 14.4 18.9 | 97.8
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 | 1.07 1.05 0.97 0.69 1.12 0.52 0.36 0.10 0.33 0.51 0.86 1.28 | 8.86
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Maximum Daily | 0.56 0.56 0.53 0.49 1.10 0.74 1.23 0.28 1.00 0.44 0.69 0.83 | 1.23
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Date of Ext-Day | 17 23 09 04 05 10 14 22 20 01 24 01 |
-Year| 2006 2000 1999 1998 2005 2007 2004 2004 2008 2005 1997 2005 |
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Avg Number of Days: | |
>= 0.01 | 10.4 9.3 8.5 7.5 7.8 4.9 2.0 1.8 3.7 4.3 8.5 10.8 | 79.3
>= 0.10 | 4.1 3.9 3.7 2.5 3.1 1.7 0.8 0.2 0.9 2.0 3.2 4.2 | 30.4
>= 0.25 | 1.1 1.3 0.9 0.8 1.5 0.5 0.4 0.1 0.3 0.7 1.0 1.6 | 10.1
>= 0.50 | 0.2 0.3 0.2 0.0 0.5 0.2 0.2 0.0 0.1 0.0 0.1 0.5 | 2.1
>= 1.00 | 0.0 0.0 0.0 0.0 0.2 0.0 0.1 0.0 0.1 0.0 0.0 0.0 | 0.4
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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| 4.2 5.5 6.5 7.6 6.9 6.9 6.1 5.5 5.0 5.2 4.5 4.7 | 5.7
Daily Avg Max 2-Min | 12.8 15.1 18.1 20.5 19.7 19.7 19.4 18.0 15.7 15.3 14.0 13.7 | 16.8
Daily Avg Peak Gust | 15.2 18.1 22.0 25.0 24.5 25.0 24.4 22.4 19.5 18.6 16.6 16.6 | 20.7
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Maximum Daily Avg | 19.4 21.2 25.4 21.4 23.9 20.0 14.7 18.4 17.3 21.9 18.2 19.4 | 25.4
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Maximum 2-Minute Avg| 46 44 44 41 41 41 45 54 37 36 38 45 | 54
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Date of Max 2min-Day| 30 28 29 29 24 01 25 10 29 30 23 14 |
-Year| 2004 2006 2005 2008 2003 2001 2002 2006 2002 1997 1998 2000 |
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Maximum Peak Gust | 62 51 51 51 48 49 61 64 48 46 45 54 | 64
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Date of Max Gust-Day| 30 07 28 14 24 19 04 10 10 29 22 14 |
-Year| 2004 2002 2007 2008 2003 2003 1998 2006 1997 2006 1998 2000 |
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Avg Number of Days: | |
Peak Gust >=30 | 2.3 3.5 6.3 9.3 9.1 9.3 8.2 7.3 5.4 4.6 3.2 3.9 | 72.3
Peak Gust >=40 | 0.4 0.9 0.9 1.8 1.5 1.7 1.6 1.3 0.7 0.6 0.5 0.5 | 12.4
Peak Gust >=50 | 0.2 0.2 0.1 0.1 0.0 0.0 0.3 0.3 0.0 0.0 0.0 0.2 | 1.3
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Max 2-Minute >=30| 0.8 1.7 2.5 3.3 2.9 3.6 2.8 2.0 2.0 1.6 1.2 0.0 | 24.6
Max 2-Minute >=40| 0.1 0.2 0.2 0.3 0.1 0.3 0.3 0.3 0.0 0.0 0.0 0.0 | 1.7
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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.