STATION: ARCATA AIRPORT (KACV), CA
CLIMATOLOGICAL SUMMARY. Period of Record: Jul 1996 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 | 55.4 55.7 55.8 56.4 60.2 62.2 63.4 63.8 63.8 62.4 58.7 55.8 | 59.5
Avg Min Temp | 39.9 39.7 39.9 41.5 45.4 47.9 51.3 51.1 47.1 43.7 42.8 39.9 | 44.2
Avg Temperature | 47.7 47.7 47.8 48.9 52.8 55.1 57.3 57.5 55.5 53.1 50.7 47.8 | 51.8
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Extremes: | |
Extreme Max Temp| 75 75 76 79 94 83 82 86 88 91 79 78 | 94
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Date of Ext-Day | 06 02 31 01 15 14 08 28 18 25 26 20 |
-Year| 2003 2000 2000 2000 2008 2000 2008 2008 2000 2003 2002 1999 |
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Extreme Min Temp| 23 27 28 30 30 36 43 41 38 29 27 22 | 22
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Date of Ext-Day | 13 08 29 04 09 08 26 05 30 31 28 17 |
-Year| 2007 2001 2008 2001 1999 1999 2001 2002 2002 2002 2004 2005 |
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Heating Degree Days | 537 488 532 483 380 298 238 234 287 371 428 532 | 4807
Cooling Degree Days | 0 0 0 0 1 0 0 0 1 1 0 0 | 5
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Avg Number of Days: | |
Max Temp >= 90 | 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.1 0.0 0.0 | 0.2
Max Temp >= 75 | 0.2 0.2 0.1 0.4 0.8 0.5 0.3 0.4 1.7 1.8 0.4 0.1 | 6.9
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 | 4.9 3.3 2.7 1.0 0.2 0.0 0.0 0.0 0.0 0.3 1.6 4.4 | 18.4
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 | 41.4 41.7 43.0 43.7 47.6 49.8 52.5 52.6 49.8 47.2 44.9 42.4 | 46.4
Avg Wet Bulb Temp | 44.2 44.4 45.6 46.2 49.9 52.0 54.2 54.2 51.9 49.4 47.4 44.9 | 48.7
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Avg Sea Level Pres | 30.16 30.11 30.15 30.08 30.07 30.06 30.02 30.01 30.00 30.06 30.13 30.13 | 30.08
(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 | 0.9 0.6 0.2 0.1 0.2 0.0 0.0 0.1 0.2 0.2 0.4 0.5 | 3.2
Heavy Fog | 3.0 2.0 4.1 2.2 3.4 5.8 6.8 9.7 10.0 7.2 4.4 2.8 | 61.3
Fog | 14.2 14.6 18.1 16.1 14.0 16.8 17.8 18.2 16.8 18.5 16.4 15.2 | 196.7
Hail | 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 | 0.1
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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 | 6.25 7.02 4.86 4.26 1.78 0.76 0.13 0.26 0.34 2.54 6.52 8.69 | 43.41
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Maximum Daily | 1.89 2.71 2.12 1.72 1.12 1.01 0.69 0.47 0.59 2.67 4.73 6.29 | 6.29
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Date of Ext-Day | 14 19 24 08 08 17 17 04 30 19 21 27 |
-Year| 2000 2002 1999 2005 2005 2005 2007 2003 2007 2007 1998 2002 |
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Avg Number of Days: | |
>= 0.01 | 16.5 17.3 15.2 15.9 10.8 6.6 4.5 7.2 9.4 13.3 18.7 18.2 | 153.7
>= 0.10 | 10.8 11.2 9.7 9.2 4.5 1.6 0.2 0.6 0.9 4.6 10.7 11.8 | 75.8
>= 0.25 | 7.3 8.2 7.1 6.0 2.8 0.9 0.1 0.3 0.3 2.8 8.2 8.7 | 52.8
>= 0.50 | 5.0 5.3 4.0 2.7 1.1 0.4 0.1 0.0 0.1 2.0 4.6 6.5 | 31.9
>= 1.00 | 2.2 1.9 1.0 0.9 0.1 0.2 0.0 0.0 0.0 0.4 1.7 2.8 | 11.2
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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| 5.8 6.0 6.5 6.4 6.7 6.6 5.4 4.9 4.4 4.4 5.0 6.7 | 5.7
Daily Avg Max 2-Min | 16.1 16.3 17.9 17.1 17.4 17.1 14.6 13.8 13.7 14.1 15.0 18.0 | 15.9
Daily Avg Peak Gust | 20.4 20.3 22.1 20.9 21.4 21.4 18.3 17.3 16.9 17.4 19.0 23.2 | 19.9
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Maximum Daily Avg | 19.9 17.0 18.1 14.5 15.3 15.3 11.6 12.3 11.7 15.1 16.2 19.2 | 19.9
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Maximum 2-Minute Avg| 38 40 39 33 32 32 28 29 31 33 40 46 | 46
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Date of Max 2min-Day| 04 25 05 16 02 08 15 31 02 19 19 31 |
-Year| 2008 2004 2006 2001 2001 2002 2008 2008 2004 2004 2001 2005 |
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Maximum Peak Gust | 54 58 53 45 40 46 47 38 41 46 55 58 | 58
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Date of Max Gust-Day| 04 25 05 19 22 18 15 31 02 19 19 31 |
-Year| 2008 2004 2006 2004 2008 2007 2008 2008 2004 2004 2001 2005 |
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Avg Number of Days: | |
Peak Gust >=30 | 5.3 4.5 5.0 2.5 3.1 3.0 1.2 1.0 2.1 2.7 4.1 9.4 | 43.9
Peak Gust >=40 | 0.7 1.1 1.8 0.1 0.1 0.4 0.1 0.0 0.1 0.3 0.6 2.8 | 8.2
Peak Gust >=50 | 0.1 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.5 | 1.2
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Max 2-Minute >=30| 1.0 1.5 1.6 0.5 0.6 0.1 0.0 0.0 0.3 0.3 0.9 0.0 | 6.8
Max 2-Minute >=40| 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 | 0.3
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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.