STATION: RIVERSIDE MUNICIPAL ARPT (KRAL), 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 | 67.8 67.4 71.1 73.1 81.0 86.5 93.5 94.1 90.3 81.6 73.4 67.3 | 78.9
Avg Min Temp | 40.6 42.2 44.2 46.4 53.2 57.0 62.3 62.0 58.8 52.4 45.0 39.9 | 50.3
Avg Temperature | 54.2 54.8 57.7 59.8 67.1 71.8 77.9 78.1 74.5 67.0 59.2 53.6 | 64.6
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Extremes: | |
Extreme Max Temp| 95 91 94 102 105 104 113 109 110 103 94 86 | 113
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Date of Ext-Day | 30 22 29 26 28 16 22 29 01 21 07 24 |
-Year| 2003 2002 2004 2004 2003 2006 2006 1998 2002 2003 2006 2005 |
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Extreme Min Temp| 24 30 30 32 39 43 52 53 49 41 27 25 | 24
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Date of Ext-Day | 14 02 04 02 10 05 24 31 25 29 30 24 |
-Year| 2007 2002 2002 1999 2003 1999 1999 1999 2005 2006 2004 1998 |
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Heating Degree Days | 338 290 237 178 34 4 0 0 1 45 190 355 | 1673
Cooling Degree Days | 3 2 10 20 98 208 401 405 287 106 17 2 | 1559
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Avg Number of Days: | |
Max Temp >= 90 | 0.3 0.1 0.9 1.8 5.2 12.9 23.8 24.5 16.7 8.4 0.9 0.0 | 95.6
Max Temp >= 75 | 7.6 5.9 10.9 11.7 23.3 27.8 31.0 30.9 29.0 21.7 12.8 6.7 | 219.2
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 | 1.8 1.1 0.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.8 | 6.9
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 | 31.6 34.0 38.0 40.6 45.6 49.2 51.5 52.3 49.8 43.1 36.0 30.2 | 41.8
Avg Wet Bulb Temp | 41.1 42.3 44.9 46.9 51.5 54.9 57.3 58.5 56.4 51.0 45.0 40.7 | 49.2
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Avg Sea Level Pres | 30.08 30.04 29.98 29.96 29.90 29.86 29.88 29.86 29.84 29.92 30.02 30.08 | 29.95
(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 | 0.7 1.7 0.7 0.6 0.4 0.0 0.8 0.2 0.3 0.9 0.8 1.2 | 8.3
Heavy Fog | 1.1 0.5 2.4 0.6 0.8 1.3 0.2 0.5 1.5 2.1 0.6 1.2 | 12.8
Fog | 15.6 15.9 19.5 17.0 18.2 18.6 14.2 14.4 13.9 17.2 16.2 13.0 | 193.6
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 | 1.14 2.43 0.81 0.81 0.08 0.04 0.03 0.00 0.01 0.40 0.50 0.87 | 7.12
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Maximum Daily | 2.39 1.43 1.99 1.34 0.31 0.32 0.15 0.04 0.05 1.48 0.76 1.45 | 2.39
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Date of Ext-Day | 09 21 15 14 22 02 16 31 20 27 24 15 |
-Year| 2005 2005 2003 2003 2006 1999 1999 1998 2005 2004 2001 2008 |
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Avg Number of Days: | |
>= 0.01 | 4.3 6.9 5.0 4.6 0.8 0.3 0.5 0.1 0.4 2.3 3.6 4.4 | 33.0
>= 0.10 | 2.3 4.7 1.9 1.9 0.3 0.1 0.1 0.0 0.0 0.8 1.5 2.0 | 15.6
>= 0.25 | 1.4 3.1 0.9 1.1 0.1 0.1 0.0 0.0 0.0 0.5 0.6 1.0 | 8.8
>= 0.50 | 0.6 2.0 0.3 0.3 0.0 0.0 0.0 0.0 0.0 0.3 0.2 0.5 | 4.2
>= 1.00 | 0.3 0.6 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.2 | 1.4
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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| 4.8 4.5 4.5 4.6 4.9 5.1 4.8 4.6 4.0 3.8 3.9 4.6 | 4.5
Daily Avg Max 2-Min | 15.6 15.4 15.9 16.3 16.5 16.5 16.6 16.4 15.5 14.4 14.0 15.0 | 15.7
Daily Avg Peak Gust | 19.4 19.2 20.0 20.8 21.1 21.2 21.5 21.1 19.8 18.2 17.7 18.7 | 19.9
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Maximum Daily Avg | 23.5 19.6 19.5 13.1 13.2 8.3 7.7 7.7 15.0 18.6 19.7 23.9 | 23.9
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Maximum 2-Minute Avg| 40 37 39 31 28 24 58 31 29 31 40 43 | 58
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Date of Max 2min-Day| 06 09 21 15 03 16 22 31 28 17 26 09 |
-Year| 2003 2002 2000 1999 2001 2006 2007 1998 2005 1999 2002 1998 |
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Maximum Peak Gust | 52 47 47 38 37 31 58 41 39 40 51 53 | 58
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Date of Max Gust-Day| 06 09 20 12 03 16 22 31 28 21 26 09 |
-Year| 2003 2002 2000 2007 2001 2006 2007 1998 2005 2007 2002 1998 |
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Avg Number of Days: | |
Peak Gust >=30 | 5.3 2.3 2.5 1.2 0.4 0.1 0.2 0.1 0.5 1.7 3.0 5.0 | 22.4
Peak Gust >=40 | 2.0 0.4 0.7 0.0 0.0 0.0 0.2 0.1 0.0 0.1 0.9 1.6 | 6.0
Peak Gust >=50 | 0.2 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.1 0.2 | 0.7
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Max 2-Minute >=30| 3.0 0.8 1.0 0.3 0.0 0.0 0.2 0.1 0.0 0.6 1.2 0.0 | 7.1
Max 2-Minute >=40| 0.1 0.0 0.0 0.0 0.0 0.0 0.2 0.0 0.0 0.0 0.1 0.0 | 0.4
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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.