STATION: RAMONA AIRPORT (KRNM), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Apr 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 | 65.5 64.5 67.0 69.7 75.3 82.2 89.0 89.8 86.4 78.8 71.7 65.5 | 75.5
Avg Min Temp | 34.2 36.8 38.9 41.4 47.7 51.3 56.8 57.1 53.2 47.2 39.8 33.9 | 44.9
Avg Temperature | 49.9 50.7 52.9 55.6 61.5 66.7 72.9 73.4 69.8 63.0 55.7 49.7 | 60.2
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Extremes: | |
Extreme Max Temp| 88 88 91 97 100 107 111 104 108 100 92 85 | 111
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Date of Ext-Day | 31 22 29 27 03 21 22 28 03 21 06 24 |
-Year| 2003 2002 2004 2004 2004 2008 2006 2005 2007 2003 2006 2005 |
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Extreme Min Temp| 16 22 27 27 33 41 43 43 39 34 26 21 | 16
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Date of Ext-Day | 17 22 21 10 10 08 25 15 25 29 14 24 |
-Year| 2007 2006 1999 1999 2003 2005 1999 1999 2005 2006 2000 1998 |
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Heating Degree Days | 470 405 374 288 132 32 1 0 18 108 283 475 | 2586
Cooling Degree Days | 1 0 0 5 23 85 245 262 162 47 5 0 | 835
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.2 0.8 2.4 5.7 14.2 16.9 11.4 5.4 0.5 0.0 | 57.5
Max Temp >= 75 | 4.9 4.6 6.6 8.8 15.8 24.5 31.0 30.6 26.7 19.7 11.2 5.1 | 189.5
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
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Min Temp <= 32 | 13.5 8.0 4.1 0.9 0.0 0.0 0.0 0.0 0.0 0.0 2.8 14.8 | 44.1
Min Temp <= 20 | 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.3
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 | 35.1 37.3 41.7 44.4 49.7 52.5 56.6 56.3 52.7 45.0 39.0 32.4 | 45.2
Avg Wet Bulb Temp | 43.2 44.6 47.2 49.5 54.5 58.0 62.4 62.5 59.3 52.9 47.4 41.3 | 51.9
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Avg Sea Level Pres | 30.09 30.06 30.01 29.99 29.93 29.89 29.90 29.89 29.87 29.94 30.03 30.09 | 29.97
(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 0.2 0.0 0.0 0.1 0.1 0.1 0.2 0.1 0.0 0.0 | 0.9
Heavy Fog | 7.2 6.2 9.0 6.8 8.7 8.5 7.4 6.0 6.5 7.5 7.3 6.5 | 87.4
Fog | 19.2 18.7 22.8 22.7 22.8 19.8 15.8 13.2 13.3 16.6 17.7 16.7 | 219.2
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 | 2.01 3.40 1.42 1.20 0.48 0.03 0.08 0.07 0.10 0.78 1.04 1.52 | 12.13
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Maximum Daily | 1.85 1.75 1.24 1.18 0.93 0.04 0.41 0.16 0.18 1.84 2.53 2.24 | 2.53
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Date of Ext-Day | 11 25 15 14 12 11 23 02 06 27 30 17 |
-Year| 2005 2003 2003 2003 1998 1998 2005 2000 2002 2004 2007 2008 |
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Avg Number of Days: | |
>= 0.01 | 7.1 9.5 7.8 7.2 3.5 2.4 2.4 3.1 4.4 4.2 5.4 7.6 | 64.5
>= 0.10 | 3.8 6.0 3.1 2.7 1.1 0.0 0.1 0.2 0.2 1.5 1.9 2.8 | 23.3
>= 0.25 | 2.1 3.8 1.9 1.4 0.6 0.0 0.1 0.0 0.0 0.8 1.2 1.5 | 13.5
>= 0.50 | 1.2 2.6 1.1 0.8 0.3 0.0 0.0 0.0 0.0 0.4 0.5 0.7 | 7.6
>= 1.00 | 0.5 0.9 0.1 0.2 0.0 0.0 0.0 0.0 0.0 0.2 0.3 0.5 | 2.6
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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| 4.7 5.0 5.0 5.1 5.0 5.1 5.0 4.9 4.5 4.6 4.3 4.5 | 4.8
Daily Avg Max 2-Min | 16.0 16.4 16.7 16.6 15.4 14.9 15.0 14.8 15.0 15.5 15.1 15.6 | 15.6
Daily Avg Peak Gust | 19.3 19.9 20.5 21.1 19.6 18.9 18.8 18.9 18.9 19.3 18.5 18.9 | 19.4
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Maximum Daily Avg | 17.7 22.2 18.8 14.1 10.7 9.6 6.9 7.1 9.5 18.6 15.4 21.2 | 22.2
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Maximum 2-Minute Avg| 40 41 36 66 36 41 33 37 24 39 33 40 | 66
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Date of Max 2min-Day| 07 10 31 25 10 30 08 01 27 21 28 16 |
-Year| 2003 2002 2005 2008 2008 2008 2008 2008 2002 2007 2002 2004 |
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Maximum Peak Gust | 48 48 54 81 69 45 44 45 30 55 41 47 | 81
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Date of Max Gust-Day| 07 10 03 25 10 30 18 01 30 22 28 16 |
-Year| 2003 2002 2008 2008 2008 2008 2008 2008 2001 2007 2002 2004 |
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Avg Number of Days: | |
Peak Gust >=30 | 3.1 2.0 3.0 2.2 0.6 0.2 0.8 0.3 0.2 1.4 1.7 2.7 | 18.2
Peak Gust >=40 | 0.3 0.7 0.7 0.5 0.1 0.1 0.2 0.2 0.0 0.2 0.1 0.8 | 3.9
Peak Gust >=50 | 0.0 0.0 0.2 0.3 0.1 0.0 0.0 0.0 0.0 0.2 0.0 0.0 | 0.8
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Max 2-Minute >=30| 0.5 0.7 0.9 0.6 0.1 0.2 0.6 0.2 0.0 0.3 0.2 0.0 | 4.2
Max 2-Minute >=40| 0.1 0.1 0.0 0.2 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 | 0.5
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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.